Chip with simple program for Toy

stan <smoore@exis.net> wrote:
Rod Speed wrote:
stan <smoore@exis.net> wrote
Rod Speed wrote
stan <smoore@exis.net> wrote
Rod Speed wrote
stan <smoore@exis.net> wrote
<reams of your puerile attempts at insults any 2 year old could leave for dead flushed where they belong>

Whoops, nothing left.
 
"lerameur" <lerameur@yahoo.com> wrote in message
news:7c26537a-1b34-4669-bcad-56455227eee3@k13g2000hse.googlegroups.com...
Hello,

I would need some help determining an inductor in spec sheet:
http://www.datasheetcatalog.org/datasheet2/e/0zzedjw7xujcg6616563932el47y.pdf

In the diagram 'Voltage boosted boost Converter' on page 10.
WHAT does the inductor refer to. A transformer? there is three legs
and this is confusing me.
Is this a part I can buy, if so, any part number at digikey ?
It's drawn as a tapped inductor; but the caption makes clear that it's a
transformer with interleaved windings. The end of one winding is connected
to the start of the other. The secondary has 5 times as many turns as the
primary and the total inductance is 4mH. That means the primary is 110nH
and the secondary is 2.8mH because inductance is proportional to number of
turns squared. You must buy a suitable pot core and wind this yourself.
 
stan <smoore@exis.net> wrote:
Rod Speed wrote:
stan <smoore@exis.net> wrote
Rod Speed wrote
stan <smoore@exis.net> wrote
Rod Speed wrote
stan <smoore@exis.net> wrote
<reams of your puerile attempts at insults any 2 year old could leave for dead flushed where they belong>

Whoops, nothing left.
 
"lerameur" <lerameur@yahoo.com> wrote in message
news:7c26537a-1b34-4669-bcad-56455227eee3@k13g2000hse.googlegroups.com...
Hello,

I would need some help determining an inductor in spec sheet:
http://www.datasheetcatalog.org/datasheet2/e/0zzedjw7xujcg6616563932el47y.pdf

In the diagram 'Voltage boosted boost Converter' on page 10.
WHAT does the inductor refer to. A transformer? there is three legs
and this is confusing me.
Is this a part I can buy, if so, any part number at digikey ?
It's drawn as a tapped inductor; but the caption makes clear that it's a
transformer with interleaved windings. The end of one winding is connected
to the start of the other. The secondary has 5 times as many turns as the
primary and the total inductance is 4mH. That means the primary is 110nH
and the secondary is 2.8mH because inductance is proportional to number of
turns squared. You must buy a suitable pot core and wind this yourself.
 
stan <smoore@exis.net> wrote:
Rod Speed wrote:
stan <smoore@exis.net> wrote
Rod Speed wrote
stan <smoore@exis.net> wrote
Rod Speed wrote
stan <smoore@exis.net> wrote
<reams of your puerile attempts at insults any 2 year old could leave for dead flushed where they belong>

Whoops, nothing left.
 
"lerameur" <lerameur@yahoo.com> wrote in message
news:7c26537a-1b34-4669-bcad-56455227eee3@k13g2000hse.googlegroups.com...
Hello,

I would need some help determining an inductor in spec sheet:
http://www.datasheetcatalog.org/datasheet2/e/0zzedjw7xujcg6616563932el47y.pdf

In the diagram 'Voltage boosted boost Converter' on page 10.
WHAT does the inductor refer to. A transformer? there is three legs
and this is confusing me.
Is this a part I can buy, if so, any part number at digikey ?
It's drawn as a tapped inductor; but the caption makes clear that it's a
transformer with interleaved windings. The end of one winding is connected
to the start of the other. The secondary has 5 times as many turns as the
primary and the total inductance is 4mH. That means the primary is 110nH
and the secondary is 2.8mH because inductance is proportional to number of
turns squared. You must buy a suitable pot core and wind this yourself.
 
stan <smoore@exis.net> wrote:
Rod Speed wrote:
stan <smoore@exis.net> wrote
Rod Speed wrote
stan <smoore@exis.net> wrote
Rod Speed wrote
stan <smoore@exis.net> wrote
<reams of your puerile attempts at insults any 2 year old could leave for dead flushed where they belong>

Whoops, nothing left.
 
"lerameur" <lerameur@yahoo.com> wrote in message
news:7c26537a-1b34-4669-bcad-56455227eee3@k13g2000hse.googlegroups.com...
Hello,

I would need some help determining an inductor in spec sheet:
http://www.datasheetcatalog.org/datasheet2/e/0zzedjw7xujcg6616563932el47y.pdf

In the diagram 'Voltage boosted boost Converter' on page 10.
WHAT does the inductor refer to. A transformer? there is three legs
and this is confusing me.
Is this a part I can buy, if so, any part number at digikey ?
It's drawn as a tapped inductor; but the caption makes clear that it's a
transformer with interleaved windings. The end of one winding is connected
to the start of the other. The secondary has 5 times as many turns as the
primary and the total inductance is 4mH. That means the primary is 110nH
and the secondary is 2.8mH because inductance is proportional to number of
turns squared. You must buy a suitable pot core and wind this yourself.
 
stan <smoore@exis.net> wrote:
Rod Speed wrote:
stan <smoore@exis.net> wrote
Rod Speed wrote
stan <smoore@exis.net> wrote
Rod Speed wrote
stan <smoore@exis.net> wrote
<reams of your puerile attempts at insults any 2 year old could leave for dead flushed where they belong>

Whoops, nothing left.
 
On Tue, 9 Sep 2008 08:08:30 -0700 (PDT),
"jalbers@bsu.edu" <jalbers@bsu.edu> wrote:

I have a few questions about the design of the circuit in Figure 1
page 71 located at https://ilocker.bsu.edu/users/jalbers/WORLD_SHARED/WireTracer.PDF

The gain of the first op amp stage is 10 and the gain fo the second op
amp stage is 33 for a total net gain of 330. Why not just use one op
amp and set the gain to 330?

When designing a circuit like this, why use a low gain of 330, why not
a higher value? How did the author arrive at 300?

Is it better to have multiple stages in an amplifier rather than just
using one op amp to get the job done? If so, why?

Any help would be greatly appreciated. Thanks
The main reason for separate stages has to do with
an op-amp parameter called Gain Bandwidth Product.
The available gain of the chip falls with
frequency, so if you need a wide bandwidth you
must use a lower gain.

The designer chooses the gain according to the
task required... more isn't better, and can easily
be much worse. (Like if the output is drivern
into clipping.)

Best regards,


Bob Masta

DAQARTA v4.00
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
FREE Signal Generator
Science with your sound card!
 
<jalbers@bsu.edu> wrote in message
news:446bddd9-58f0-4096-8bc7-59b8fdc68618@j22g2000hsf.googlegroups.com...
I have a few questions about the design of the circuit in Figure 1
page 71 located at
https://ilocker.bsu.edu/users/jalbers/WORLD_SHARED/WireTracer.PDF

The gain of the first op amp stage is 10 and the gain fo the second op
amp stage is 33 for a total net gain of 330. Why not just use one op
amp and set the gain to 330?

When designing a circuit like this, why use a low gain of 330, why not
a higher value? How did the author arrive at 300?

Is it better to have multiple stages in an amplifier rather than just
using one op amp to get the job done? If so, why?

Any help would be greatly appreciated. Thanks
There is no reason this circuit would not operate perfectly well with a
single op-amp with a gain of 330 times. The discussion about gain bandwidth
product, while true, is a nonsequitur in this application. There is
sufficient gain-bandwidth to amplify mid range audio signals for your
purposes.

However, high gain implies a wide spread of resistance values. Finding a
suitable gain control pot might be an issue.

This thing has a low frequency cutoff of 1590Hz. What frequencies is it
supposed to amplify? It would be very poor at 50 or 60 Hz.

One poster mentioned DC characteristics such as drift and offset as a reason
for keeping the gain low per stage, but this circuit has a DC gain of unity
in both stages. A single stage version would be the same, meaning the DC
characteristics are immaterial.

Someone also mentioned noise. The more stages and the more TOTAL gain the
more noise. Spreading the gain amongst more stage adds noise it does not
reduce it. The total gain is the same.

These guys used two amplifiers because they felt like it not because of any
technical reason. They had a dual amplifier so that's what they used. A
better circuit would use one amplifier to establish the battery center
voltage with high resistance and the other amplifier as a single gain stage.
In this way the battery drain could be minimized to microamps in the quiet
state.
 
"Eeysore"
Bob Masta wrote:


The main reason for separate stages has to do with
an op-amp parameter called Gain Bandwidth Product.
The available gain of the chip falls with
frequency, so if you need a wide bandwidth you
must use a lower gain.

Yes, but for best noise performance the first stage should have the higher
gain (making
certain assumptions about source impedance and op-amps used but almost
invariably the
case).

** Nonsense.

Once the first stage has a gain of a few times, then its ouput noise will
swamp the input noise of the following stage - no matter what gain it has.


...... Phil
 
"steve" <kvsteve@gmail.com> wrote in message
news:a6b6ad71-8653-4bcc-9a04-f722da1667e2@b38g2000prf.googlegroups.com...
For the 555 timer, a transformer is used to run the circuit, instead
of the usual battery supply.

Although the transformer supplied the required 8-18 volts after
regulation, the circuit will not work with it.

However, the circuit works ok with the 9v battery only.

Since the ac supply is necessary, I would appreciate some answers
here.

Yours sincerely

Steve
I'll give this a go for you.
Your AC needs to be rectified into DC to supply the 555, and smoothing the
ripple with caps is a very good idea too. (its a timing chip)
Then a regulator for a constant voltage, to say, 12 volts will also help
greatly.
If you need AC in your design too, then tap it from the transformer before
the rectifier.
Do further research!!

Mark
 
"Eeysore"
Phil Allison wrote:
"Eeysore"


Yes, but for best noise performance the first stage should have the
higher
gain (making certain assumptions about source impedance and op-amps
used but
almost invariably the case).

** Nonsense.

Once the first stage has a gain of a few times, then its output noise
will
swamp the input noise of the following stage - no matter what gain it
has.

** Nonsence.

What I say is true at ALL times.

** Nope - it is just more of your inexhaustible supply

of RIDICULOUS & FALSE INFORMATION !





...... Phil
 
jalbers@bsu.edu wrote:
I would like to know how to modify the diode equation: I = Io (Exp(eV/
NkT)-1) to work for a germanium diode. Using Io=10E-12, e=1.602E-19,
T=295, N=1, and k=1.380E-23 has the correct knee 0.6 for a silicon
diode. What needs to be changed (or is there a new equation) to move
the knee back to around 0.3 to model a germanium diode?

Any help would be greatly appreciated. Thanks
Adjust N, which is a constant that depends upon the manufacturing
process and semiconductor material. A value somewhere in the
neighborhood of 0.5 will probably do the trick.
 
<cforu4@gmail.com> wrote in message
news:3df5d453-7ff0-4ce8-9ef7-c58ab9a8ca40@v16g2000prc.googlegroups.com...
i am student in graduate degree so, i am interested in knowing about
sensors
so,i am requesting you members to help in my doughts
Maybe you shouldn't have skipped undergrad? Or did you get your bachelors in
pottery making?
 
<extremesoundandlight@yahoo.com> wrote in message
news:71f6f20a-68a8-49a8-869c-30b3cc35263a@c22g2000prc.googlegroups.com...
This is a new design for Gyroscopic Inductance circuit for DC current
production using the gyroscope itself as the induction circuit for
long term space flight. It will produce Direct current from a
gyroscope functioning in a zero gravitational field as an inductance
circuit. The two non-permeable gimbals’ armatures rotate around a
permanent inner magnet 180 degrees out of phase from one another
giving 360 degrees of a full rotation that allow a 100% duty cycle
when precession occurs. A north and south alignment on the spherical
inner permanent magnet rotates around the central centrifugal spin
axis witch doubles as a rotor flywheel. I have been working on the
proto type for 15 years now utilizing nano carbon fiber as the coils
in the inductor circuit; they are imbedded into the gyro’s non-
permeable gimbals in a zigzag pattern un-like the coils in an
induction circuit. Magnetic couplers between the gyroscopes parts
reduce further fatigue on the motor parts and reduce friction. There
are strategically placed permeable alloys in the gimbal armatures when
pulsed with DC current create magnetic field areas that interact with
the rotor for start, stop and homing of the gimbals. if gravitational
interference occurs in space flight a dc pulsed circuit 90 degrees
adjacent from the rotor flywheel controlled with small pulses of
current to control initial spin and braking on the central rotor while
motor functions are restored as needed, This design has several viable
applications for aro space industry. If solar panel deployment fails
or damages to solar panels this is a solid backup for running the
system operations of satellites and communication and instrumentation,
imaging instrumentation devices for space flight.

Does anybody use mechanical gyros anymore? I don't think so, especially for
space applications.
 
<extremesoundandlight@yahoo.com> wrote in message
news:5823b196-f46a-4c6f-aac5-b8cfcf4f7ad6@r15g2000prh.googlegroups.com...
On Sep 11, 9:47 am, "Bob Eld" <nsmontas...@yahoo.com> wrote:
extremesoundandli...@yahoo.com> wrote in message

news:71f6f20a-68a8-49a8-869c-30b3cc35263a@c22g2000prc.googlegroups.com...
This is a new design for Gyroscopic Inductance circuit for DC current
production using the gyroscope itself as the induction circuit for
long term space flight. It will produce Direct current from a
gyroscope functioning in a zero gravitational field as an inductance
circuit. The two non-permeable gimbals’ armatures rotate around a
permanent inner magnet 180 degrees out of phase from one another
giving 360 degrees of a full rotation that allow a 100% duty cycle
when precession occurs. A north and south alignment on the spherical
inner permanent magnet rotates around the central centrifugal spin
axis witch doubles as a rotor flywheel. I have been working on the
proto type for 15 years now utilizing nano carbon fiber as the coils
in the inductor circuit; they are imbedded into the gyro’s non-
permeable gimbals in a zigzag pattern un-like the coils in an
induction circuit. Magnetic couplers between the gyroscopes parts
reduce further fatigue on the motor parts and reduce friction. There
are strategically placed permeable alloys in the gimbal armatures when
pulsed with DC current create magnetic field areas that interact with
the rotor for start, stop and homing of the gimbals. if gravitational
interference occurs in space flight a dc pulsed circuit 90 degrees
adjacent from the rotor flywheel controlled with small pulses of
current to control initial spin and braking on the central rotor while
motor functions are restored as needed, This design has several viable
applications for aro space industry. If solar panel deployment fails
or damages to solar panels this is a solid backup for running the
system operations of satellites and communication and instrumentation,
imaging instrumentation devices for space flight.

Does anybody use mechanical gyros anymore? I don't think so, especially
for
space applications.
The RIFCA Trihex provides the primary guidance, flight control, and
mission sequencing functions for the Delta launch vehicles, guiding
the rocket into precise space orbit. It has routinely achieved
guidance accuracies at least three times better than mission
requirements. L-3's Trihex is a triple-redundant, six Ring Laser
Gyroscopes and six accelerometer guidance package that, in the course
of over 60 launches, has flown with 100% success and never triggered a
single redundancy back up during normal flight operations but Gyro's
dont keep generating low voltage dc current while their spinning in
zero gravity

Help me out here. Laser gyro's aren't mechanical are they? I thought they
operated by sending laser light around a fiber optic ring and measuring the
interference caused by motion of the ring relative to the absolute velocity
of light. Possible because of the special theory of relativity, if you will.
Nothing moves but photons. No spinning masses or other 19th century
accoutrements.
 
"Bill"


Technical: if each of the stages has a bandwidth that includes the
audio bandwidth and a response that is sufficiently flat, which is the
usual case, the stages do not amplify the input distortion, because
distortion is a ratio, and each stage amplifies both wanted and
unwanted components in more or less equal amounts.

** Simply stated, the distortion (as a percentage) will not change - it
just gets amplified along with everything else that is presented to the
input.


Of course it will
slightly favor one or the others, but it is hard to tell which ones,
and the "average" of the "gain factor" applied to the input distortion
is closer to 1 than to G (the gain of that stage). Another thing is
that that stage will also create and add new distortion products.

** In a chain of audio op-amp stages, the one operating with the highest
output level will usually be the one producing the most non-linear
distortion. So that makes it the last one.

In practice however, the THD produced is so low it is negligible - even
using old types like the 301A or 741.


...... Phil
 
"John Fields" <jfields@austininstruments.com> wrote in message
news:q5cjc49jkrkjokn2jnbtui2n6qjlp2itf3@4ax.com...
[snip]
In practice however, the THD produced is so low it is negligible - even
using old types like the 301A or 741.


..... Phil

---
Can't argue with that. ;-)

I've got an old Radio Shack stereo receiver which lost a 1458 early on
and, after replacing it, it still works and I can still jam with Hot
Tuna.

JF
Hot Tuna! Jack and Jorma would be proud of you.

Bob
--
== All google group posts are automatically deleted due to spam ==
 

Welcome to EDABoard.com

Sponsor

Back
Top