Huh? Since When--?

Chiron · Jan 19, 2012

On Thu, 19 Jan 2012 15:47:23 -0500, Phil Hobbs wrote:

Chiron wrote:

On Thu, 19 Jan 2012 09:01:40 -0500, Phil Hobbs wrote:

Ron Hubbard wrote:

On Jan 13, 9:06 am, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
On 01/12/2012 03:07 PM, Ron Hubbard wrote:

On Jan 12, 11:32 am, Michael Black<et...@ncf.ca> wrote:
On Thu, 12 Jan 2012, Ron Hubbard wrote:
On Jan 12, 4:25 am, "Michael A.
Terrell"<mike.terr...@earthlink.net> wrote:
Ron Hubbard wrote:

I use the Exar XR2206 function generator in a lot of my
projects but now I see-- at least according to Mouser-- that
the IC has become obsolete? Since when? Why? How can such a
useful chip become discontinued? This not right!

What's not right about dropping obsolete parts?

Well, it'd be kind of like killing off the 555/7555. Think
about all those thousands?-- millions?--- of circuits that use
the 555 IC. While not so ubiquitous, the 2206 is an incredibly
useful little IC. I don't know of any other chip where you get
a sine wave past 1 MHz with so few parts let alone triangle
waves. I know there other function generator chips, but if you
need to pack it into a small space--- say, you were making
something really funky like a sonic screwdriver--- the 2206
and its associated parts can easily be put on a very narrow
piece of perfboard; ya can't do that with the 8038 or the
other similar chips.

I would never consider using a 2206 at 1Mhz. It really is
stretching the device, while some other device more suitable
for "rf" makes it simple again.

No, we're saying the whole concept of an analog function
generator on an IC is in the past, not that one device is
obsolete and others aren't.

I have no idea what you mean by a "sonic screwdriver", but if
you don't need frequency range, there are lots of other
solutions.

Not a Doctor Who fan I take it... A sonic screwdriver in
fiction is a multi-purpose pocket-sized tool that does just
about everything but make coffee. Most people say it can't be
done in the real world but like so many things, most people are
wrong.

While it's not much more than a hi-tech toy. my circuit can
produce a whopping 143 dB of 13 kHz ultrasound that *will* turn
screws (some of them anyway), turn keys in locks, spin dinner
plates, drive your neighbor mad, and do other silly but cool
tricks. while not exactly the tool of choice on many occasions,
a lot of people have expressed interest in making one and the
XR2206 is a very critical part to frquency modulate the main
ultrasonic beam fro 1 Hz to 100 Hz.

Doctor Who, I presume. A couple of questions:

143 dB compared to what? 143 dB SPL A-weighted? 143 dBm?

143 dB at 4" to 6" which is not bad considering it comes from a
handheld battery (2 sub-C cells) powered device that drives a piezo-
transducer less than 1" in diameter. But like I said, just a hi-tech
toy to amaze friends and sometimes annoy neighbors heh heh. ;-)

At what range? A hearing aid can do that inside the ear--not so
whopping at all, though it would certainly hurt. Annoying people,
that I believe. Tightening screws? Not so much.

Annoying, people, that I believe. Tightening screws? You're making
that up.

Cheers

Phil Hobbs

He said "turning" screws, not tightening them. I might possibly
believe that the vibrations might loosen screws...

That's why I specified tightening. He claimed that it was a 'sonic
screwdriver', whereas it's just an oscillator driving a resonant piezo.
Probably you want a screwdriver to turn both ways....

Cheers

Phil Hobbs

Ah, he didn't specify that this was a *bidirectional* sonic
screwdriver... big difference there, you know? With a bidirectional
sonic screwdriver, sure you'd get tightening as well as loosening.

But yeah, I wouldn't buy that it could tighten screws, even if it was
bidirectional.

--
The absence of labels [in ECL] is probably a good thing.
-- T. Cheatham

Phil Hobbs · Jan 19, 2012

Ron Hubbard wrote:

On Jan 16, 6:23 pm, George Herold <gher...@teachspin.com> wrote:
On Jan 16, 6:30 pm, Ron Hubbard <or...@dslnorthwest.net> wrote:

On Jan 12, 6:31 pm, George Herold <gher...@teachspin.com> wrote:

On Jan 12, 3:07 pm, Ron Hubbard <or...@dslnorthwest.net> wrote:

On Jan 12, 11:32 am, Michael Black <et...@ncf.ca> wrote:

On Thu, 12 Jan 2012, Ron Hubbard wrote:
On Jan 12, 4:25 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:
Ron Hubbard wrote:

I use the Exar XR2206 function generator in a lot of my projects but
now I see-- at least according to Mouser-- that the IC has become
obsolete? Since when? Why? How can such a useful chip become
discontinued? This not right!

What's not right about dropping obsolete parts?

Well, it'd be kind of like killing off the 555/7555. Think about all
those thousands?-- millions?--- of circuits that use the 555 IC. While
not so ubiquitous, the 2206 is an incredibly useful little IC. I don't
know of any other chip where you get a sine wave past 1 MHz with so
few parts let alone triangle waves. I know there other function
generator chips, but if you need to pack it into a small space--- say,
you were making something really funky like a sonic screwdriver--- the
2206 and its associated parts can easily be put on a very narrow piece
of perfboard; ya can't do that with the 8038 or the other similar
chips.

I would never consider using a 2206 at 1Mhz. It really is stretching the
device, while some other device more suitable for "rf" makes it simple
again.

No, we're saying the whole concept of an analog function generator on an
IC is in the past, not that one device is obsolete and others aren't.

I have no idea what you mean by a "sonic screwdriver", but if you don't
need frequency range, there are lots of other solutions.

Not a Doctor Who fan I take it... A sonic screwdriver in fiction is a
multi-purpose pocket-sized tool that does just about everything but
make coffee. Most people say it can't be done in the real world but
like so many things, most people are wrong.

While it's not much more than a hi-tech toy. my circuit can produce a
whopping 143 dB of 13 kHz ultrasound that *will* turn screws (some of
them anyway), turn keys in locks, spin dinner plates, drive your
neighbor mad, and do other silly but cool tricks. while not exactly
the tool of choice on many occasions, a lot of people
have expressed interest in making one and the XR2206 is a very
critical part to frquency modulate the main ultrasonic beam fro 1 Hz
to 100 Hz.

http://www.physicsforums.com/showthread.php?p=3702452&posted=1#post37...

If you only need
one type of waveform, there are other solutions, especially if it's not a
sinewave you need

Ahh, but that's why the 2206 is such a beautiful chip: it does produce
nice sine waves with a minimum of support parts and the harmonic
distortion can be reduced if anyone wants to take the trouble of
putting in a small pot instead of a fixed resistor and checking the
output on a 'scope but why bother.

Ron

.
________
"Care for a jelly baby?"

-- the 4th Doctor --- Hide quoted text -

- Show quoted text -

Ron have you checked out the VCO on the CD4046? (The price is right!)
If you coddled it I think you can get a triangle wave output.

George H.- Hide quoted text -

- Show quoted text -

I wish I could get a sine wave from the 4046 but it has the
advantage-- at least for me anyway-- is that it's VCO can be easily
made to have a variable delay when frequency modulated. Makes a nice
siren if someone needed it or a sound effect generator.

Ron- Hide quoted text -

- Show quoted text -

Phil H. has this tanh converter circuit he posted on his web site.
That should make it at least as good as the exar part... A dual
transistor and an opamp I think.

Then you've got a circuit that will do more than 2MHz.

George H.- Hide quoted text -

- Show quoted text -

That only works for a specific frequency and doesn't work if the input
frequency is being frequency modulated.

Sure it does. Why wouldn't it?

Besides, why add more
complications to an already sophisticated circuit that fits in a
barely pocket-sized (9 to 11 in.) device? Who wants a foot-long
screwdriver?

I have several. But yours isn't one.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot net
http://electrooptical.net

Phil Hobbs · Jan 19, 2012

Ron Hubbard wrote:

On Jan 19, 12:47 pm, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
Chiron wrote:

On Thu, 19 Jan 2012 09:01:40 -0500, Phil Hobbs wrote:

Ron Hubbard wrote:

On Jan 13, 9:06 am, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
On 01/12/2012 03:07 PM, Ron Hubbard wrote:

On Jan 12, 11:32 am, Michael Black<et...@ncf.ca> wrote:
On Thu, 12 Jan 2012, Ron Hubbard wrote:
On Jan 12, 4:25 am, "Michael A.
Terrell"<mike.terr...@earthlink.net> wrote:
Ron Hubbard wrote:

I use the Exar XR2206 function generator in a lot of my
projects but now I see-- at least according to Mouser-- that
the IC has become obsolete? Since when? Why? How can such a
useful chip become discontinued? This not right!

What's not right about dropping obsolete parts?

Well, it'd be kind of like killing off the 555/7555. Think about
all those thousands?-- millions?--- of circuits that use the 555
IC. While not so ubiquitous, the 2206 is an incredibly useful
little IC. I don't know of any other chip where you get a sine
wave past 1 MHz with so few parts let alone triangle waves. I
know there other function generator chips, but if you need to
pack it into a small space--- say, you were making something
really funky like a sonic screwdriver--- the 2206 and its
associated parts can easily be put on a very narrow piece of
perfboard; ya can't do that with the 8038 or the other similar
chips.

I would never consider using a 2206 at 1Mhz. It really is
stretching the device, while some other device more suitable for
"rf" makes it simple again.

No, we're saying the whole concept of an analog function generator
on an IC is in the past, not that one device is obsolete and
others aren't.

I have no idea what you mean by a "sonic screwdriver", but if you
don't need frequency range, there are lots of other solutions.

Not a Doctor Who fan I take it... A sonic screwdriver in fiction
is a multi-purpose pocket-sized tool that does just about
everything but make coffee. Most people say it can't be done in the
real world but like so many things, most people are wrong.

While it's not much more than a hi-tech toy. my circuit can produce
a whopping 143 dB of 13 kHz ultrasound that *will* turn screws
(some of them anyway), turn keys in locks, spin dinner plates,
drive your neighbor mad, and do other silly but cool tricks. while
not exactly the tool of choice on many occasions, a lot of people
have expressed interest in making one and the XR2206 is a very
critical part to frquency modulate the main ultrasonic beam fro 1
Hz to 100 Hz.

Doctor Who, I presume. A couple of questions:

143 dB compared to what? 143 dB SPL A-weighted? 143 dBm?

143 dB at 4" to 6" which is not bad considering it comes from a
handheld battery (2 sub-C cells) powered device that drives a piezo-
transducer less than 1" in diameter. But like I said, just a hi-tech
toy to amaze friends and sometimes annoy neighbors heh heh. ;-)

At what range? A hearing aid can do that inside the ear--not so
whopping at all, though it would certainly hurt. Annoying people, that
I believe. Tightening screws? Not so much.

Annoying, people, that I believe. Tightening screws? You're making that
up.

Cheers

Phil Hobbs

He said "turning" screws, not tightening them. I might possibly believe
that the vibrations might loosen screws...

That's why I specified tightening. He claimed that it was a 'sonic
screwdriver', whereas it's just an oscillator driving a resonant piezo.
Probably you want a screwdriver to turn both ways....

You want proof of concept, take a speaker box (if you can find one)
with two screws on it. Place on the box a spaker connected to a
frequency generataor and tune up the frequency; at one point-- if the
sound is intense enough (i.e "loud") the screws will start to turn
upwards. And of course, if the screws are at their top/terminal
position to begin with, getting the right freq and the screws will go
down-- this of course is easier as you don't hav gravity to contend
with.

Ron

Everybody knows that vibration can loosen screws--that's what lock
washers and torque wrenches are there to prevent.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot net
http://electrooptical.net

Ron Hubbard · Jan 19, 2012

On Jan 19, 12:47 pm, Phil Hobbs
<pcdhSpamMeSensel...@electrooptical.net> wrote:

Chiron wrote:

On Thu, 19 Jan 2012 09:01:40 -0500, Phil Hobbs wrote:

Ron Hubbard wrote:

On Jan 13, 9:06 am, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
On 01/12/2012 03:07 PM, Ron Hubbard wrote:

On Jan 12, 11:32 am, Michael Black<et...@ncf.ca> wrote:
On Thu, 12 Jan 2012, Ron Hubbard wrote:
On Jan 12, 4:25 am, "Michael A.
Terrell"<mike.terr...@earthlink.net> wrote:
Ron Hubbard wrote:

I use the Exar XR2206 function generator in a lot of my
projects but now I see-- at least according to Mouser-- that
the IC has become obsolete? Since when? Why? How can such a
useful chip become discontinued? This not right!

What's not right about dropping obsolete parts?

Well, it'd be kind of like killing off the 555/7555. Think about
all those thousands?-- millions?--- of circuits that use the 555
IC. While not so ubiquitous, the 2206 is an incredibly useful
little IC. I don't know of any other chip where you get a sine
wave past 1 MHz with so few parts let alone triangle waves. I
know there other function generator chips, but if you need to
pack it into a small space--- say, you were making something
really funky like a sonic screwdriver--- the 2206 and its
associated parts can easily be put on a very narrow piece of
perfboard; ya can't do that with the 8038 or the other similar
chips.

I would never consider using a 2206 at 1Mhz. It really is
stretching the device, while some other device more suitable for
"rf" makes it simple again.

No, we're saying the whole concept of an analog function generator
on an IC is in the past, not that one device is obsolete and
others aren't.

I have no idea what you mean by a "sonic screwdriver", but if you
don't need frequency range, there are lots of other solutions.

Not a Doctor Who fan I take it... A sonic screwdriver in fiction
is a multi-purpose pocket-sized tool that does just about
everything but make coffee. Most people say it can't be done in the
real world but like so many things, most people are wrong.

While it's not much more than a hi-tech toy. my circuit can produce
a whopping 143 dB of 13 kHz ultrasound that *will* turn screws
(some of them anyway), turn keys in locks, spin dinner plates,
drive your neighbor mad, and do other silly but cool tricks. while
not exactly the tool of choice on many occasions, a lot of people
have expressed interest in making one and the XR2206 is a very
critical part to frquency modulate the main ultrasonic beam fro 1
Hz to 100 Hz.

Doctor Who, I presume. A couple of questions:

143 dB compared to what? 143 dB SPL A-weighted? 143 dBm?

143 dB at 4" to 6" which is not bad considering it comes from a
handheld battery (2 sub-C cells) powered device that drives a piezo-
transducer less than 1" in diameter. But like I said, just a hi-tech
toy to amaze friends and sometimes annoy neighbors heh heh. ;-)

At what range? A hearing aid can do that inside the ear--not so
whopping at all, though it would certainly hurt. Annoying people, that
I believe. Tightening screws? Not so much.

Annoying, people, that I believe. Tightening screws? You're making that
up.

Cheers

Phil Hobbs

He said "turning" screws, not tightening them. I might possibly believe
that the vibrations might loosen screws...

That's why I specified tightening. He claimed that it was a 'sonic
screwdriver', whereas it's just an oscillator driving a resonant piezo.
Probably you want a screwdriver to turn both ways....

You want proof of concept, take a speaker box (if you can find one)
with two screws on it. Place on the box a spaker connected to a
frequency generataor and tune up the frequency; at one point-- if the
sound is intense enough (i.e "loud") the screws will start to turn
upwards. And of course, if the screws are at their top/terminal
position to begin with, getting the right freq and the screws will go
down-- this of course is easier as you don't hav gravity to contend
with.

Ron

Ron Hubbard · Jan 19, 2012

On Jan 16, 6:23 pm, George Herold <gher...@teachspin.com> wrote:

On Jan 16, 6:30 pm, Ron Hubbard <or...@dslnorthwest.net> wrote:

On Jan 12, 6:31 pm, George Herold <gher...@teachspin.com> wrote:

On Jan 12, 3:07 pm, Ron Hubbard <or...@dslnorthwest.net> wrote:

On Jan 12, 11:32 am, Michael Black <et...@ncf.ca> wrote:

On Thu, 12 Jan 2012, Ron Hubbard wrote:
On Jan 12, 4:25 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:
Ron Hubbard wrote:

I use the Exar XR2206 function generator in a lot of my projects but
now I see-- at least according to Mouser-- that the IC has become
obsolete? Since when? Why? How can such a useful chip become
discontinued? This not right!

What's not right about dropping obsolete parts?

Well, it'd be kind of like killing off the 555/7555. Think about all
those thousands?-- millions?--- of circuits that use the 555 IC.. While
not so ubiquitous, the 2206 is an incredibly useful little IC. I don't
know of any other chip where you get a sine wave past 1 MHz with so
few parts let alone triangle waves. I know there other function
generator chips, but if you need to pack it into a small space--- say,
you were making something really funky like a sonic screwdriver--- the
2206 and its associated parts can easily be put on a very narrow piece
of perfboard; ya can't do that with the 8038 or the other similar
chips.

I would never consider using a 2206 at 1Mhz. It really is stretching the
device, while some other device more suitable for "rf" makes it simple
again.

No, we're saying the whole concept of an analog function generator on an
IC is in the past, not that one device is obsolete and others aren't.

I have no idea what you mean by a "sonic screwdriver", but if you don't
need frequency range, there are lots of other solutions.

Not a Doctor Who fan I take it... A sonic screwdriver in fiction is a
multi-purpose pocket-sized tool that does just about everything but
make coffee. Most people say it can't be done in the real world but
like so many things, most people are wrong.

While it's not much more than a hi-tech toy. my circuit can produce a
whopping 143 dB of 13 kHz ultrasound that *will* turn screws (some of
them anyway), turn keys in locks, spin dinner plates, drive your
neighbor mad, and do other silly but cool tricks. while not exactly
the tool of choice on many occasions, a lot of people
have expressed interest in making one and the XR2206 is a very
critical part to frquency modulate the main ultrasonic beam fro 1 Hz
to 100 Hz.

http://www.physicsforums.com/showthread.php?p=3702452&posted=1#post37...

If you only need
one type of waveform, there are other solutions, especially if it's not a
sinewave you need

Ahh, but that's why the 2206 is such a beautiful chip: it does produce
nice sine waves with a minimum of support parts and the harmonic
distortion can be reduced if anyone wants to take the trouble of
putting in a small pot instead of a fixed resistor and checking the
output on a 'scope but why bother.

Ron

.
________
"Care for a jelly baby?"

-- the 4th Doctor --- Hide quoted text -

- Show quoted text -

Ron have you checked out the VCO on the CD4046? (The price is right!)
If you coddled it I think you can get a triangle wave output.

George H.- Hide quoted text -

- Show quoted text -

I wish I could get a sine wave from the 4046 but it has the
advantage-- at least for me anyway-- is that it's VCO can be easily
made to have a variable delay when frequency modulated. Makes a nice
siren if someone needed it or a sound effect generator.

Ron- Hide quoted text -

- Show quoted text -

Phil H. has this tanh converter circuit he posted on his web site.
That should make it at least as good as the exar part... A dual
transistor and an opamp I think.

Then you've got a circuit that will do more than 2MHz.

George H.- Hide quoted text -

- Show quoted text -

That only works for a specific frequency and doesn't work if the input
frequency is being frequency modulated. Besides, why add more
complications to an already sophisticated circuit that fits in a
barely pocket-sized (9 to 11 in.) device? Who wants a foot-long
screwdriver?

Ron

George Herold · Jan 20, 2012

On Jan 19, 3:47 pm, Phil Hobbs
<pcdhSpamMeSensel...@electrooptical.net> wrote:

Chiron wrote:

On Thu, 19 Jan 2012 09:01:40 -0500, Phil Hobbs wrote:

Ron Hubbard wrote:

On Jan 13, 9:06 am, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
On 01/12/2012 03:07 PM, Ron Hubbard wrote:

On Jan 12, 11:32 am, Michael Black<et...@ncf.ca> wrote:
On Thu, 12 Jan 2012, Ron Hubbard wrote:
On Jan 12, 4:25 am, "Michael A.
Terrell"<mike.terr...@earthlink.net> wrote:
Ron Hubbard wrote:

I use the Exar XR2206 function generator in a lot of my
projects but now I see-- at least according to Mouser-- that
the IC has become obsolete? Since when? Why? How can such a
useful chip become discontinued? This not right!

What's not right about dropping obsolete parts?

Well, it'd be kind of like killing off the 555/7555. Think about
all those thousands?-- millions?--- of circuits that use the 555
IC. While not so ubiquitous, the 2206 is an incredibly useful
little IC. I don't know of any other chip where you get a sine
wave past 1 MHz with so few parts let alone triangle waves. I
know there other function generator chips, but if you need to
pack it into a small space--- say, you were making something
really funky like a sonic screwdriver--- the 2206 and its
associated parts can easily be put on a very narrow piece of
perfboard; ya can't do that with the 8038 or the other similar
chips.

I would never consider using a 2206 at 1Mhz. It really is
stretching the device, while some other device more suitable for
"rf" makes it simple again.

No, we're saying the whole concept of an analog function generator
on an IC is in the past, not that one device is obsolete and
others aren't.

I have no idea what you mean by a "sonic screwdriver", but if you
don't need frequency range, there are lots of other solutions.

Not a Doctor Who fan I take it... A sonic screwdriver in fiction
is a multi-purpose pocket-sized tool that does just about
everything but make coffee. Most people say it can't be done in the
real world but like so many things, most people are wrong.

While it's not much more than a hi-tech toy. my circuit can produce
a whopping 143 dB of 13 kHz ultrasound that *will* turn screws
(some of them anyway), turn keys in locks, spin dinner plates,
drive your neighbor mad, and do other silly but cool tricks. while
not exactly the tool of choice on many occasions, a lot of people
have expressed interest in making one and the XR2206 is a very
critical part to frquency modulate the main ultrasonic beam fro 1
Hz to 100 Hz.

Doctor Who, I presume. A couple of questions:

143 dB compared to what? 143 dB SPL A-weighted? 143 dBm?

143 dB at 4" to 6" which is not bad considering it comes from a
handheld battery (2 sub-C cells) powered device that drives a piezo-
transducer less than 1" in diameter. But like I said, just a hi-tech
toy to amaze friends and sometimes annoy neighbors heh heh. ;-)

At what range? A hearing aid can do that inside the ear--not so
whopping at all, though it would certainly hurt. Annoying people, that
I believe. Tightening screws? Not so much.

Annoying, people, that I believe. Tightening screws? You're making that
up.

Cheers

Phil Hobbs

He said "turning" screws, not tightening them. I might possibly believe
that the vibrations might loosen screws...

That's why I specified tightening. He claimed that it was a 'sonic
screwdriver', whereas it's just an oscillator driving a resonant piezo.
Probably you want a screwdriver to turn both ways....

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot nethttp://electrooptical.net- Hide quoted text -

- Show quoted text -

Hmm not to nit pick... (OK I am nit picking :^) But I as far as I can
remember Dr. Who never used his sonic screwdriver for tightening
screws.

George H.

George Herold · Jan 20, 2012

On Jan 19, 6:14 pm, Phil Hobbs
<pcdhSpamMeSensel...@electrooptical.net> wrote:

Ron Hubbard wrote:

On Jan 16, 6:23 pm, George Herold <gher...@teachspin.com> wrote:
On Jan 16, 6:30 pm, Ron Hubbard <or...@dslnorthwest.net> wrote:

On Jan 12, 6:31 pm, George Herold <gher...@teachspin.com> wrote:

On Jan 12, 3:07 pm, Ron Hubbard <or...@dslnorthwest.net> wrote:

On Jan 12, 11:32 am, Michael Black <et...@ncf.ca> wrote:

On Thu, 12 Jan 2012, Ron Hubbard wrote:
On Jan 12, 4:25 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:
Ron Hubbard wrote:

I use the Exar XR2206 function generator in a lot of my projects but
now I see-- at least according to Mouser-- that the IC has become
obsolete? Since when? Why? How can such a useful chip become
discontinued? This not right!

What's not right about dropping obsolete parts?

Well, it'd be kind of like killing off the 555/7555. Think about all
those thousands?-- millions?--- of circuits that use the 555 IC. While
not so ubiquitous, the 2206 is an incredibly useful little IC. I don't
know of any other chip where you get a sine wave past 1 MHz with so
few parts let alone triangle waves. I know there other function
generator chips, but if you need to pack it into a small space--- say,
you were making something really funky like a sonic screwdriver--- the
2206 and its associated parts can easily be put on a very narrow piece
of perfboard; ya can't do that with the 8038 or the other similar
chips.

I would never consider using a 2206 at 1Mhz. It really is stretching the
device, while some other device more suitable for "rf" makes it simple
again.

No, we're saying the whole concept of an analog function generator on an
IC is in the past, not that one device is obsolete and others aren't.

I have no idea what you mean by a "sonic screwdriver", but if you don't
need frequency range, there are lots of other solutions.

Not a Doctor Who fan I take it... A sonic screwdriver in fiction is a
multi-purpose pocket-sized tool that does just about everything but
make coffee. Most people say it can't be done in the real world but
like so many things, most people are wrong.

While it's not much more than a hi-tech toy. my circuit can produce a
whopping 143 dB of 13 kHz ultrasound that *will* turn screws (some of
them anyway), turn keys in locks, spin dinner plates, drive your
neighbor mad, and do other silly but cool tricks. while not exactly
the tool of choice on many occasions, a lot of people
have expressed interest in making one and the XR2206 is a very
critical part to frquency modulate the main ultrasonic beam fro 1 Hz
to 100 Hz.

http://www.physicsforums.com/showthread.php?p=3702452&posted=1#post37...

If you only need
one type of waveform, there are other solutions, especially if it's not a
sinewave you need

Ahh, but that's why the 2206 is such a beautiful chip: it does produce
nice sine waves with a minimum of support parts and the harmonic
distortion can be reduced if anyone wants to take the trouble of
putting in a small pot instead of a fixed resistor and checking the
output on a 'scope but why bother.

Ron

.
________
"Care for a jelly baby?"

-- the 4th Doctor --- Hide quoted text -

- Show quoted text -

Ron have you checked out the VCO on the CD4046? (The price is right!)
If you coddled it I think you can get a triangle wave output.

George H.- Hide quoted text -

- Show quoted text -

I wish I could get a sine wave from the 4046 but it has the
advantage-- at least for me anyway-- is that it's VCO can be easily
made to have a variable delay when frequency modulated. Makes a nice
siren if someone needed it or a sound effect generator.

Ron- Hide quoted text -

- Show quoted text -

Phil H. has this tanh converter circuit he posted on his web site.
That should make it at least as good as the exar part... A dual
transistor and an opamp I think.

Then you've got a circuit that will do more than 2MHz.

George H.- Hide quoted text -

- Show quoted text -

That only works for a specific frequency and doesn't work if the input
frequency is being frequency modulated.

Sure it does. Why wouldn't it?

Yeah it works on the voltage. (not the frequency.) You have to feed
it a known amplitude triangle wave. (I'm reply to the OP and not to
you Phil... And please correct me if I'm wrong.) The exar does
something similar inside.

George H.

Besides, why add more
complications to an already sophisticated circuit that fits in a
barely pocket-sized (9 to 11 in.) device? Who wants a foot-long
screwdriver?

I have several. But yours isn't one.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot nethttp://electrooptical.net- Hide quoted text -

- Show quoted text -

Phil Hobbs · Jan 20, 2012

George Herold wrote:

On Jan 19, 3:47 pm, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
Chiron wrote:

On Thu, 19 Jan 2012 09:01:40 -0500, Phil Hobbs wrote:

Ron Hubbard wrote:

On Jan 13, 9:06 am, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
On 01/12/2012 03:07 PM, Ron Hubbard wrote:

On Jan 12, 11:32 am, Michael Black<et...@ncf.ca> wrote:
On Thu, 12 Jan 2012, Ron Hubbard wrote:
On Jan 12, 4:25 am, "Michael A.
Terrell"<mike.terr...@earthlink.net> wrote:
Ron Hubbard wrote:

I use the Exar XR2206 function generator in a lot of my
projects but now I see-- at least according to Mouser-- that
the IC has become obsolete? Since when? Why? How can such a
useful chip become discontinued? This not right!

What's not right about dropping obsolete parts?

Well, it'd be kind of like killing off the 555/7555. Think about
all those thousands?-- millions?--- of circuits that use the 555
IC. While not so ubiquitous, the 2206 is an incredibly useful
little IC. I don't know of any other chip where you get a sine
wave past 1 MHz with so few parts let alone triangle waves. I
know there other function generator chips, but if you need to
pack it into a small space--- say, you were making something
really funky like a sonic screwdriver--- the 2206 and its
associated parts can easily be put on a very narrow piece of
perfboard; ya can't do that with the 8038 or the other similar
chips.

I would never consider using a 2206 at 1Mhz. It really is
stretching the device, while some other device more suitable for
"rf" makes it simple again.

No, we're saying the whole concept of an analog function generator
on an IC is in the past, not that one device is obsolete and
others aren't.

I have no idea what you mean by a "sonic screwdriver", but if you
don't need frequency range, there are lots of other solutions.

Not a Doctor Who fan I take it... A sonic screwdriver in fiction
is a multi-purpose pocket-sized tool that does just about
everything but make coffee. Most people say it can't be done in the
real world but like so many things, most people are wrong.

While it's not much more than a hi-tech toy. my circuit can produce
a whopping 143 dB of 13 kHz ultrasound that *will* turn screws
(some of them anyway), turn keys in locks, spin dinner plates,
drive your neighbor mad, and do other silly but cool tricks. while
not exactly the tool of choice on many occasions, a lot of people
have expressed interest in making one and the XR2206 is a very
critical part to frquency modulate the main ultrasonic beam fro 1
Hz to 100 Hz.

Doctor Who, I presume. A couple of questions:

143 dB compared to what? 143 dB SPL A-weighted? 143 dBm?

143 dB at 4" to 6" which is not bad considering it comes from a
handheld battery (2 sub-C cells) powered device that drives a piezo-
transducer less than 1" in diameter. But like I said, just a hi-tech
toy to amaze friends and sometimes annoy neighbors heh heh. ;-)

At what range? A hearing aid can do that inside the ear--not so
whopping at all, though it would certainly hurt. Annoying people, that
I believe. Tightening screws? Not so much.

Annoying, people, that I believe. Tightening screws? You're making that
up.

Cheers

Phil Hobbs

He said "turning" screws, not tightening them. I might possibly believe
that the vibrations might loosen screws...

That's why I specified tightening. He claimed that it was a 'sonic
screwdriver', whereas it's just an oscillator driving a resonant piezo.
Probably you want a screwdriver to turn both ways....

Cheers

Phil Hobbs

Hmm not to nit pick... (OK I am nit picking :^) But I as far as I can
remember Dr. Who never used his sonic screwdriver for tightening
screws.

George H.

His maintenance guy had one too.

(I haven't watched a Dr. Who episode since I was a kid. I never watch
TV unless I'm stuck in some hotel without a good book, and even then I
just find some documentary or in a pinch the weather report. TV is both
boring and depressing.)

Cheers

Phil Hobbs

Chiron · Jan 20, 2012

On Thu, 19 Jan 2012 17:10:19 -0800, George Herold wrote:

On Jan 19, 3:47Â pm, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
Chiron wrote:

On Thu, 19 Jan 2012 09:01:40 -0500, Phil Hobbs wrote:

Ron Hubbard wrote:

On Jan 13, 9:06 am, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
On 01/12/2012 03:07 PM, Ron Hubbard wrote:

On Jan 12, 11:32 am, Michael Black<et...@ncf.ca> Â wrote:
On Thu, 12 Jan 2012, Ron Hubbard wrote:
On Jan 12, 4:25 am, "Michael A.
Terrell"<mike.terr...@earthlink.net> wrote:
Ron Hubbard wrote:

I use the Exar XR2206 function generator in a lot of my
projects but now I see-- at least according to Mouser--
that the IC has become obsolete? Since when? Why? How can
such a useful chip become discontinued? This not right!

Â Â What's not right about dropping obsolete parts?

Well, it'd be kind of like killing off the 555/7555. Think
about all those thousands?-- millions?--- of circuits that
use the 555 IC. While not so ubiquitous, the 2206 is an
incredibly useful little IC. I don't know of any other chip
where you get a sine wave past 1 MHz with so few parts let
alone triangle waves. I know there other function generator
chips, but if you need to pack it into a small space--- say,
you were making something really funky like a sonic
screwdriver--- the 2206 and its associated parts can easily
be put on a very narrow piece of perfboard; ya can't do that
with the 8038 or the other similar chips.

I would never consider using a 2206 at 1Mhz. Â It really is
stretching the device, while some other device more suitable
for "rf" makes it simple again.

No, we're saying the whole concept of an analog function
generator on an IC is in the past, not that one device is
obsolete and others aren't.

I have no idea what you mean by a "sonic screwdriver", but if
you don't need frequency range, there are lots of other
solutions.

Not a Doctor Who fan I take it... Â A sonic screwdriver in
fiction is a multi-purpose pocket-sized tool that does just
about everything but make coffee. Most people say it can't be
done in the real world but like so many things, most people
are wrong.

While it's not much more than a hi-tech toy. my circuit can
produce a whopping 143 dB of 13 kHz ultrasound that *will*
turn screws (some of them anyway), turn keys in locks, spin
dinner plates, drive your neighbor mad, and do other silly but
cool tricks. while not exactly the tool of choice on many
occasions, a lot of people have expressed interest in making
one and the XR2206 is a very critical part to frquency
modulate the main ultrasonic beam fro 1 Hz to 100 Hz.

Doctor Who, I presume. Â A couple of questions:

143 dB compared to what? 143 dB SPL A-weighted? Â 143 dBm?

143 dB at 4" to 6" which is not bad considering it comes from a
handheld battery (2 sub-C cells) powered device that drives a
piezo- transducer less than 1" in diameter. But like I said, just
a hi-tech toy to amaze friends and sometimes annoy neighbors heh
heh. Â ;-)

At what range? Â A hearing aid can do that inside the ear--not so
whopping at all, though it would certainly hurt. Annoying people,
that I believe. Â Tightening screws? Â Not so much.

Annoying, people, that I believe. Â Tightening screws? You're making
that up.

Cheers

Phil Hobbs

He said "turning" screws, not tightening them. Â I might possibly
believe that the vibrations might loosen screws...

That's why I specified tightening. Â He claimed that it was a 'sonic
screwdriver', whereas it's just an oscillator driving a resonant piezo.
Probably you want a screwdriver to turn both ways....

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot nethttp://electrooptical.net- Hide quoted
text -

- Show quoted text -

Hmm not to nit pick... (OK I am nit picking :^) But I as far as I can
remember Dr. Who never used his sonic screwdriver for tightening screws.

George H.

Must not have had the bidirectional model... just my guess, I've never
even seen a Dr. Who episode.

--
How many Zen Buddhist does it take to change a light bulb?

Two. One to change it and one not to change it.

fungus · Jan 20, 2012

On Jan 19, 11:47 pm, Ron Hubbard <or...@dslnorthwest.net> wrote:

That only works for a specific frequency and doesn't work if the input
frequency is being frequency modulated. Besides, why add more
complications to an already sophisticated circuit that fits in a
barely pocket-sized (9 to 11 in.) device? Who wants a foot-long
screwdriver?

The original sonic screwdriver was made
with vacuum tubes and had space left over.
Then again, it was much bigger on the inside
than on the outside.

George Herold · Jan 20, 2012

On Jan 19, 11:22 pm, Phil Hobbs
<pcdhSpamMeSensel...@electrooptical.net> wrote:

George Herold wrote:

On Jan 19, 3:47 pm, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
Chiron wrote:

On Thu, 19 Jan 2012 09:01:40 -0500, Phil Hobbs wrote:

Ron Hubbard wrote:

On Jan 13, 9:06 am, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
On 01/12/2012 03:07 PM, Ron Hubbard wrote:

On Jan 12, 11:32 am, Michael Black<et...@ncf.ca> wrote:
On Thu, 12 Jan 2012, Ron Hubbard wrote:
On Jan 12, 4:25 am, "Michael A.
Terrell"<mike.terr...@earthlink.net> wrote:
Ron Hubbard wrote:

I use the Exar XR2206 function generator in a lot of my
projects but now I see-- at least according to Mouser-- that
the IC has become obsolete? Since when? Why? How can such a
useful chip become discontinued? This not right!

What's not right about dropping obsolete parts?

Well, it'd be kind of like killing off the 555/7555. Think about
all those thousands?-- millions?--- of circuits that use the 555
IC. While not so ubiquitous, the 2206 is an incredibly useful
little IC. I don't know of any other chip where you get a sine
wave past 1 MHz with so few parts let alone triangle waves.. I
know there other function generator chips, but if you need to
pack it into a small space--- say, you were making something
really funky like a sonic screwdriver--- the 2206 and its
associated parts can easily be put on a very narrow piece of
perfboard; ya can't do that with the 8038 or the other similar
chips.

I would never consider using a 2206 at 1Mhz. It really is
stretching the device, while some other device more suitable for
"rf" makes it simple again.

No, we're saying the whole concept of an analog function generator
on an IC is in the past, not that one device is obsolete and
others aren't.

I have no idea what you mean by a "sonic screwdriver", but if you
don't need frequency range, there are lots of other solutions.

Not a Doctor Who fan I take it... A sonic screwdriver in fiction
is a multi-purpose pocket-sized tool that does just about
everything but make coffee. Most people say it can't be done in the
real world but like so many things, most people are wrong.

While it's not much more than a hi-tech toy. my circuit can produce
a whopping 143 dB of 13 kHz ultrasound that *will* turn screws
(some of them anyway), turn keys in locks, spin dinner plates,
drive your neighbor mad, and do other silly but cool tricks. while
not exactly the tool of choice on many occasions, a lot of people
have expressed interest in making one and the XR2206 is a very
critical part to frquency modulate the main ultrasonic beam fro 1
Hz to 100 Hz.

Doctor Who, I presume. A couple of questions:

143 dB compared to what? 143 dB SPL A-weighted? 143 dBm?

143 dB at 4" to 6" which is not bad considering it comes from a
handheld battery (2 sub-C cells) powered device that drives a piezo-
transducer less than 1" in diameter. But like I said, just a hi-tech
toy to amaze friends and sometimes annoy neighbors heh heh. ;-)

At what range? A hearing aid can do that inside the ear--not so
whopping at all, though it would certainly hurt. Annoying people, that
I believe. Tightening screws? Not so much.

Annoying, people, that I believe. Tightening screws? You're making that
up.

Cheers

Phil Hobbs

He said "turning" screws, not tightening them. I might possibly believe
that the vibrations might loosen screws...

That's why I specified tightening. He claimed that it was a 'sonic
screwdriver', whereas it's just an oscillator driving a resonant piezo.
Probably you want a screwdriver to turn both ways....

Cheers

Phil Hobbs

Hmm not to nit pick... (OK I am nit picking :^) But I as far as I can
remember Dr. Who never used his sonic screwdriver for tightening
screws.

George H.

His maintenance guy had one too.

(I haven't watched a Dr. Who episode since I was a kid. I never watch
TV unless I'm stuck in some hotel without a good book, and even then I
just find some documentary or in a pinch the weather report. TV is both
boring and depressing.)

Cheers

Phil Hobbs- Hide quoted text -

- Show quoted text -

Yeah Dr. Who was on some afternoon when I was an undergrad.
A crowd would gather to watch... which made it fun.

All I watch on TV these days is occasional sports, (corrupted by my
Dad, so Im a Buffalo fan) and nature/ science shows on PBS with the
kids.

I never go anywhere without a book in my possession. With my nose
tucked into some trashy novel long lines become enjoyable.

George H.

Michael A. Terrell · Jan 26, 2012

Ron Hubbard wrote:

Who wants a foot-long screwdriver?

Anyone who needs the proper hand tools. Some of mine are 36", and I
have a custom flexible stainless steel 1/8" blade that is 42 inches to
reach into equipment to adjust hidden controls. I also have a lot of
1/4" hex extensions and can make any length I need. Have you ever used
a 24 foot long drill bit to run wire? I have.

--
You can't have a sense of humor, if you have no sense.

Michael A. Terrell · Jan 26, 2012

fungus wrote:

The original sonic screwdriver was made
with vacuum tubes and had space left over.
Then again, it was much bigger on the inside
than on the outside.

Like the empty policies of the current administration.

--
You can't have a sense of humor, if you have no sense.

Michael A. Terrell · Jan 26, 2012

Ron Hubbard wrote:

143 dB at 4" to 6" which is not bad considering it comes from a
handheld battery (2 sub-C cells) powered device that drives a piezo-
transducer less than 1" in diameter. But like I said, just a hi-tech
toy to amaze friends and sometimes annoy neighbors heh heh. ;-)

Just more 'grade F' science fiction.

--
You can't have a sense of humor, if you have no sense.

Jim Thompson · Jan 26, 2012

On Thu, 26 Jan 2012 11:10:14 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Thu, 26 Jan 2012 12:49:15 -0500, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

Ron Hubbard wrote:

Who wants a foot-long screwdriver?

Anyone who needs the proper hand tools. Some of mine are 36", and I
have a custom flexible stainless steel 1/8" blade that is 42 inches to
reach into equipment to adjust hidden controls. I also have a lot of
1/4" hex extensions and can make any length I need. Have you ever used
a 24 foot long drill bit to run wire? I have.

I've got a 6 footer, absolutely necessary to get thru fire-breaks. But
I've never seen a 24 footer ;-)

...Jim Thompson

But that reminds me, I've used 20' sections of PVC pipe to thread wire
(and coax and CAT-5) thru my old flat-roofed house... pre-thread the
pipe sections with the wire, then shove the PVC from a roof side vent
under the insulation to a ceiling cut-out... great fun :-(

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice

Michael A. Terrell · Jan 27, 2012

Jim Thompson wrote:

On Thu, 26 Jan 2012 11:10:14 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Thu, 26 Jan 2012 12:49:15 -0500, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

Ron Hubbard wrote:

Who wants a foot-long screwdriver?

Anyone who needs the proper hand tools. Some of mine are 36", and I
have a custom flexible stainless steel 1/8" blade that is 42 inches to
reach into equipment to adjust hidden controls. I also have a lot of
1/4" hex extensions and can make any length I need. Have you ever used
a 24 foot long drill bit to run wire? I have.

I've got a 6 footer, absolutely necessary to get thru fire-breaks. But
I've never seen a 24 footer ;-)

...Jim Thompson

But that reminds me, I've used 20' sections of PVC pipe to thread wire
(and coax and CAT-5) thru my old flat-roofed house... pre-thread the
pipe sections with the wire, then shove the PVC from a roof side vent
under the insulation to a ceiling cut-out... great fun :-(

Not as much as running wire in a department store, over a drop tile
celing that's 30 feet off the floor. We had to use rolling scaffolding,
and remove some tiles, then the cable was tied to a full roll of Scotch
66 tape, and thrown from hole to hole.

--
You can't have a sense of humor, if you have no sense.

Jim Thompson · Jan 27, 2012

On Fri, 27 Jan 2012 00:02:21 -0500, "Michael A. Terrell"
<mike.terrell@earthlink.net> wrote:

Jim Thompson wrote:

On Thu, 26 Jan 2012 11:10:14 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Thu, 26 Jan 2012 12:49:15 -0500, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

Ron Hubbard wrote:

Who wants a foot-long screwdriver?

Anyone who needs the proper hand tools. Some of mine are 36", and I
have a custom flexible stainless steel 1/8" blade that is 42 inches to
reach into equipment to adjust hidden controls. I also have a lot of
1/4" hex extensions and can make any length I need. Have you ever used
a 24 foot long drill bit to run wire? I have.

I've got a 6 footer, absolutely necessary to get thru fire-breaks. But
I've never seen a 24 footer ;-)

...Jim Thompson

But that reminds me, I've used 20' sections of PVC pipe to thread wire
(and coax and CAT-5) thru my old flat-roofed house... pre-thread the
pipe sections with the wire, then shove the PVC from a roof side vent
under the insulation to a ceiling cut-out... great fun :-(

Not as much as running wire in a department store, over a drop tile
celing that's 30 feet off the floor. We had to use rolling scaffolding,
and remove some tiles, then the cable was tied to a full roll of Scotch
66 tape, and thrown from hole to hole.

I've done that too

Michael A. Terrell · Jan 28, 2012

Jim Thompson wrote:

Michael A. Terrell wrote:

Not as much as running wire in a department store, over a drop tile
celing that's 30 feet off the floor. We had to use rolling scaffolding,
and remove some tiles, then the cable was tied to a full roll of Scotch
66 tape, and thrown from hole to hole.

I've done that too

While some idiot decides the scaffolding is in their way, and gives it
a shove while you're up in the grid?

--
You can't have a sense of humor, if you have no sense.

fungus · Jan 28, 2012

On Jan 28, 12:14 pm, "Michael A. Terrell" <mike.terr...@earthlink.net>
wrote:

Jim Thompson wrote:

Michael A. Terrell wrote:

...30 feet off the floor. We had to use rolling scaffolding,

While some idiot decides the scaffolding is in their way,
and gives it a shove while you're up in the grid?

We're electronics guys. We know how to hook
up a 7000 volt tickler for people like that...

Ron Hubbard · Jan 31, 2012

On Jan 19, 5:10 pm, George Herold <gher...@teachspin.com> wrote:

On Jan 19, 3:47 pm, Phil Hobbs

pcdhSpamMeSensel...@electrooptical.net> wrote:
Chiron wrote:

On Thu, 19 Jan 2012 09:01:40 -0500, Phil Hobbs wrote:

Ron Hubbard wrote:

On Jan 13, 9:06 am, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
On 01/12/2012 03:07 PM, Ron Hubbard wrote:

On Jan 12, 11:32 am, Michael Black<et...@ncf.ca> wrote:
On Thu, 12 Jan 2012, Ron Hubbard wrote:
On Jan 12, 4:25 am, "Michael A.
Terrell"<mike.terr...@earthlink.net> wrote:
Ron Hubbard wrote:

I use the Exar XR2206 function generator in a lot of my
projects but now I see-- at least according to Mouser-- that
the IC has become obsolete? Since when? Why? How can such a
useful chip become discontinued? This not right!

What's not right about dropping obsolete parts?

Well, it'd be kind of like killing off the 555/7555. Think about
all those thousands?-- millions?--- of circuits that use the 555
IC. While not so ubiquitous, the 2206 is an incredibly useful
little IC. I don't know of any other chip where you get a sine
wave past 1 MHz with so few parts let alone triangle waves. I
know there other function generator chips, but if you need to
pack it into a small space--- say, you were making something
really funky like a sonic screwdriver--- the 2206 and its
associated parts can easily be put on a very narrow piece of
perfboard; ya can't do that with the 8038 or the other similar
chips.

I would never consider using a 2206 at 1Mhz. It really is
stretching the device, while some other device more suitable for
"rf" makes it simple again.

No, we're saying the whole concept of an analog function generator
on an IC is in the past, not that one device is obsolete and
others aren't.

I have no idea what you mean by a "sonic screwdriver", but if you
don't need frequency range, there are lots of other solutions..

Not a Doctor Who fan I take it... A sonic screwdriver in fiction
is a multi-purpose pocket-sized tool that does just about
everything but make coffee. Most people say it can't be done in the
real world but like so many things, most people are wrong.

While it's not much more than a hi-tech toy. my circuit can produce
a whopping 143 dB of 13 kHz ultrasound that *will* turn screws
(some of them anyway), turn keys in locks, spin dinner plates,
drive your neighbor mad, and do other silly but cool tricks. while
not exactly the tool of choice on many occasions, a lot of people
have expressed interest in making one and the XR2206 is a very
critical part to frquency modulate the main ultrasonic beam fro 1
Hz to 100 Hz.

Doctor Who, I presume. A couple of questions:

143 dB compared to what? 143 dB SPL A-weighted? 143 dBm?

143 dB at 4" to 6" which is not bad considering it comes from a
handheld battery (2 sub-C cells) powered device that drives a piezo-
transducer less than 1" in diameter. But like I said, just a hi-tech
toy to amaze friends and sometimes annoy neighbors heh heh. ;-)

At what range? A hearing aid can do that inside the ear--not so
whopping at all, though it would certainly hurt. Annoying people, that
I believe. Tightening screws? Not so much.

Annoying, people, that I believe. Tightening screws? You're making that
up.

Cheers

Phil Hobbs

He said "turning" screws, not tightening them. I might possibly believe
that the vibrations might loosen screws...

That's why I specified tightening. He claimed that it was a 'sonic
screwdriver', whereas it's just an oscillator driving a resonant piezo.
Probably you want a screwdriver to turn both ways....

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot nethttp://electrooptical.net-Hide quoted text -

- Show quoted text -

Hmm not to nit pick... (OK I am nit picking :^) But I as far as I can
remember Dr. Who never used his sonic screwdriver for tightening
screws.

George H.- Hide quoted text -

- Show quoted text -

Yeah, the screwdriver can't produce true torque-- it works mostly on a
resonance effect. Or rather, it would in the real world; in the Doctor
Who world it does medical scans, welds wire, cut out locks, and
everything else but make a proper cuppa tea.

Mine works at 13 kHz, a compromise frequency that I can hear but most
people have a problem hearing (I don't care *what* they say about the
upper limit for human hearing being 20 kHz, that's BS) but when
frequency modulated, they can hear the lowr secondary frequency.

Ron

Huh? Since When--?

Chiron

Guest

Phil Hobbs

Guest

Phil Hobbs

Guest

Ron Hubbard

Guest

Ron Hubbard

Guest

George Herold

Guest

George Herold

Guest

Phil Hobbs

Guest

Chiron

Guest

fungus

Guest

George Herold

Guest

Michael A. Terrell

Guest

Michael A. Terrell

Guest

Michael A. Terrell

Guest

Jim Thompson

Guest

Michael A. Terrell

Guest

Jim Thompson

Guest

Michael A. Terrell

Guest

fungus

Guest

Ron Hubbard

Guest

Log in

Welcome to EDABoard.com

Sponsor