Chip with simple program for Toy

[Rod Speed]

Eeyore <rabbitsfriendsandrelations@hotmail.com> wrote

Rod Speed wrote
Eeyore <rabbitsfriendsandrelations@hotmail.com> wrote
John Fields wrote

"It's rewarding to have an idea, make it actually work, and sell
it to people who appreciate it. Call it insecurity, but seeing the
ideas out there working, for serious people, is awfully validating."

I have to say that (for example) when I see my high power audio amps
sitting in an amp rack - at least 10 yrs old in my local venue and still performing
flawlesslessly day in, day out - it does give me some satisfaction.

Thats not an idea, thats just routine engineering.

You haven't a clue what you're talking about.

Guess which pathetic little prat has just got egg all over its pathetic little face, yet again ?

No prized for the answer.

The designs were totally original,

Easy to claim. Hell of a lot harder to actually substantiate that claim.

although obviously drawing on some aspects of prior art.

Funny that. So nothing like 'totally original' in fact.

I'd like to see YOU design one ready for production in the tens of thousands !

Routine engineering, stupid.

 

[Phil Allison]

"H. Dixon"

I've finished the standard "build yourself a adjustable power supply"
project and some small others. I was looking at this:
http://www.electronics-lab.com/projects/test/014/index.html

I'd like to try this and was wondering about actually adding it to the
power supply. The PS has two 24V center tapped transformers with the
primaries in parallel and the secondaries in series. Right now the
center taps are not used. Could I make use of the centers, couple of
resistors, add another bridge rectifier and supply the input for the
above voltmeter? It does require +-5 volts so I guess it would have to
resemble the schematic at the bottom where they use the 7805/7905 to
get the +-5V.

** Beware - the " Sample Power supply 1 " schem will simply not work.

The other schems look OK.



...... Phil

 

[Rod Speed]

Eeyore <rabbitsfriendsandrelations@hotmail.com> wrote

Rod Speed wrote
Eeyore wrote
Rod Speed wrote
Eeyore wrote
John Fields wrote

"It's rewarding to have an idea, make it actually work, and sell
it to people who appreciate it. Call it insecurity, but seeing the
ideas out there working, for serious people, is awfully validating."

I have to say that (for example) when I see my high power
audioamps sitting in an amp rack - at least 10 yrs old in my
local venue and still performing flawlesslessly day in, day
out - it does give me some satisfaction.

Thats not an idea, thats just routine engineering.

You haven't a clue what you're talking about.

Guess which pathetic little prat has just got egg all over its pathetic little face, yet again ?

No prizes for the answer.

The designs were totally original,

Easy to claim. Hell of a lot harder to actually substantiate that claim.

Until not long ago the schematics were online.

And that proved that it is nothing like 'totally original'

although obviously drawing on some aspects of prior art.

Funny that. So nothing like 'totally original' in fact.

NOTHING is TOTALLY original.

Then why did you lie when you claimed it was, liar ?

I'd like to see YOU design one ready for production in the tens of thousands !

Routine engineering, stupid.

Clearly you're no engineer.

Guess which pathetic little prat has just got egg all over its pathetic little face, yet again ?

Even someone as stupid as you should have noticed that thats no
feat, and in fact happens every single day right thruout the world, liar.

Even the chinese can do that, liar.

 

[Phil Allison]

"John Popelish"

I'm pretty sure you will need an isolated supply for this kit,

** Not true.

The kit gives few detail,s, but the data sheet for the chip:
http://www.intersil.com/data/fn/fn3082.pdf
Gives more. It appears that the input common of the chip (pin 32)

** The 7107 is the one used here ( LED drive) and that needs +/- 5 volts
supplies with the common on pin 21.

Usually, one just connects the minus input to the PSU common.

The 7106 has a floating ( ie battery ) supply.



...... Phil

 

[Phil Allison]

"John Popelish"
Phil Allison wrote:

** Beware - the " Sample Power supply 1 " schem will simply not work.

It might, if the positive and negative supply currents vary
only a small fraction of the total current if the LED
current passes through both regulators. But I can't see how
the LED current returns to the negative supply at all.

The data sheet:
http://www.intersil.com/data/fn/fn3082.pdf
shows the digital ground (the negative rail for the LED
switches) connecting to pin 27 but the schematic shows pin
27 connected only to a capacitor. And this is what is shown
on the data sheet as a typical ICL7107 design. WTF?


** Looks like misprint in figure 8, pin 27 should be labelled as pin 21.

The -5 volt supply needs only small current, hence the simple inverter schem
to derive it from the +5 volt one.



....... Phil

 

[Rod Speed]

BretCahill@peoplepc.com wrote:

InnoCentive found that “the further the problem was from
the solver’s expertise, the more likely they were to solve
it,” often by applying specialized knowledge or instruments
developed for another purpose.

Maybe it would be better to say the more stunning
the breakthrough the more dissimilar the fields.

Or maybe thats mindlessly silly. Didnt happen with the stunning
breakthrus of the industrial revolution, discovery of electricity,
evolution, working out what DNA is about, the invention of the
transistor, or the integrated circuit, or radio, or TV or
photography or movies or the PC or the net either.

A chemist came up with the MRI.

A PHYSICAL chemist.

Which ain't no physicist.

It does however involved other similar technologys like NMR etc.

Einstein came up with the Freon based cooling system which
is considered more mechanical engineering that atomic physics.

Hardly surprising given that he was initially employed in the patent office.

How does that make Einstein a ME?

Pathetic.

There are endless other examples

We need to get some stats on how often

on how often developments comes from those outside their fields.

Pity neither of those you waved around qualifys.

 

[Rod Speed]

BretCahill@peoplepc.com wrote:

InnoCentive found that “the further the problem was from
the solver’s expertise, the more likely they were to solve
it,” often by applying specialized knowledge or instruments
developed for another purpose.

Maybe it would be better to say the more stunning
the breakthrough the more dissimilar the fields.

Or maybe thats mindlessly silly. Didnt happen with the
stunning breakthrus of the industrial revolution, discovery
of electricity, evolution, working out what DNA is about, the
invention of the transistor, or the integrated circuit, or radio,
or TV or photography or movies or the PC or the net either.

A chemist came up with the MRI.

You fucked that up completely too
http://en.wikipedia.org/wiki/Peter_Mansfield

Einstein came up with the Freon based cooling system which
is considered more mechanical engineering that atomic physics.

Hardly surprising given that he was initially employed in the patent office.

How does that make Einstein a ME?

Pathetic.

You have no calculations or reasoning.

You in spades, child.

There are endless other examples
We need to get some stats on how often
on how often developments comes from those outside their fields.

Pity

You cannot disprove that you are pitiful, as worthless as Al Gore in a dust devil.

Never ever could bullshit its way out of a wet paper bag.

 

[Rod Speed]

BretCahill@peoplepc.com wrote:

InnoCentive found that “the further the problem was from
the solver’s expertise, the more likely they were to solve
it,” often by applying specialized knowledge or instruments
developed for another purpose.

Maybe it would be better to say the more stunning
the breakthrough the more dissimilar the fields.

Or maybe thats mindlessly silly. Didnt happen with the
stunning breakthrus of the industrial revolution, discovery
of electricity, evolution, working out what DNA is about, the
invention of the transistor, or the integrated circuit, or radio,
or TV or photography or movies or the PC or the net either.

A chemist came up with the MRI.

You fucked that up completely too
http://en.wikipedia.org/wiki/Peter_Mansfield

It does however involved other similar technologys like NMR etc.

Nope. Nothing close.

You fucked that up completely too
http://en.wikipedia.org/wiki/Peter_Mansfield

Einstein came up with the Freon based cooling system which
is considered more mechanical engineering that atomic physics.

Hardly surprising given that he was initially employed in the patent office.

How does that make Einstein a ME?

Pathetic.

You have no calculations or reasoning.

You in spades, child.

There are endless other examples
We need to get some stats on how often
on how often developments comes from those outside their fields.

Pity

You cannot disprove that you are pitiful, as worthless as Al Gore in a dust devil.

Never ever could bullshit its way out of a wet paper bag.

 

[Rod Speed]

BretCahill@peoplepc.com wrote:

OK, no flaming on my threads.

You get to wear asbestos threads, fuckwit.

Hope you get mesothelioma.

 

[Bob Masta]

On Sun, 3 Aug 2008 11:35:17 -0700 (PDT), "Dave, I can't do that"
<davenpete@gmail.com> wrote:

Hi,

I have a circuit that calls for TLC555 and I have about a zillion
NE555.

Why couldn't I use the NE in place of the CMOS version?

Thanks

Dave

Besides what others have posted, another reason (depending on your
circuit) may be what it does to your power rails. I know everyone
loves 555s because they can be quite stable, but the older ones at
least drew a hell of a current spike when they fired. Added to the
fact that they need so many parts, I gave up on them "way back when".
But they may have fixed the current spikes in the later versions.

(See Don Lancaster's "CMOS Cookbook" for simple 2-gate circuits
if you don't need 555 stability. In fact, with some tweaks you can
even make these amazingly stable as well. They don't trash the power
rails, and they are a good fit for CMOS or op-amp circuits.)

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!

 

[Rod Speed]

BretCahill@peoplepc.com wrote:

InnoCentive found that “the further the problem was
from the solver’s expertise, the more likely they were
to solve it,” often by applying specialized knowledge
or instruments developed for another purpose.

Maybe it would be better to say the more stunning
the breakthrough the more dissimilar the fields.

Or maybe thats mindlessly silly. Didnt happen with the
stunning breakthrus of the industrial revolution, discovery
of electricity, evolution, working out what DNA is about, the
invention of the transistor, or the integrated circuit, or radio,
or TV or photography or movies or the PC or the net either.

A chemist came up with the MRI.

http://en.wikipedia.org/wiki/Peter_Mansfield

Nope.

http://en.wikipedia.org/wiki/Paul_Lauterbur

Which says

The Nobel Prize in Physics in 1952, which went to Felix Bloch and Edward
Purcell, was for the development of nuclear magnetic resonance (NMR), the
scientific principle behind MRI. However, for decades magnetic resonance
was used mainly for studying the chemical structure of substances. It
wasn't until the 1970s with Lauterbur's and Mansfield's developments
that NMR could be used to produce images of the body.

Thanks for that spectacular footshot of yours. You can fall over now.

Einstein came up with the Freon based cooling system which
is considered more mechanical engineering that atomic physics.

Hardly surprising given that he was initially employed in the patent office.

How does that make Einstein a ME?

Pathetic.

You have no calculations or reasoning.

You in spades, child.

Every time you dodge I'll pop the same question:

And I'll respond precisely the same way, child.

How does working at the PO make Einstein a ME?

Pathetic.

And even if the correllation is weak or nonexistent, don't you think
that interdisciplinarity should be researched and properly debunked?

Dont need any research to debunk that stupid claim you made thats still second from the top, child.

 

[pimpom]

"Viel Spass" <andy77017@yahoo.com> wrote in message
news:799fb6e7-2f35-4454-9781-a15ed2f792ff@p25g2000hsf.googlegroups.com...

I am looking for some ideas. I have an answering machine
runnning off
a 12 VDC transformer.

Whenever power goes out, I have to turn it back on. (Recording
is
still kept)

It draws 200 ma of current which I calculate to be V x A = 6
watts.

Could I use 8 D size 1.5 V batteries?
Do they make a 12 volt UPS ?

Yes, subject to some conditions.

1) That your answering machine does not require a stable
regulated supply that stays very close to 12V..
2) That you have some form of automatic switchover. Connecting
the D batteries and the output of the 12V supply together will
not do. Connecting one diode each (say 1N4001) in series with the
"12 VDC transformer" and the battery stack should work, provided
that the machine does not mind the slight drop in voltage (the
diode will drop close to 1V on load).
3) That power does not remain off for too long. D cells won't
last very long at a continuous drain of 200mA. OTOH, if 200mA is
the nameplate rating on the machine, it's probably the maximum
and does not draw that much current all the time.

 

[Rod Speed]

BretCahill@peoplepc.com wrote:

OK, no flaming on my threads.

You get to wear asbestos threads,

Nope. Illegal.

Your problem.

Hope you get mesothelioma.

Ain't gonna happen. You must inhale asbestos to get mesothelioma

And that will happen when you're wearing asbestos, child.

and even then the disease is rare.

Wrong, as always.

 

[Tom Biasi]

"Viel Spass" <andy77017@yahoo.com> wrote in message
news:799fb6e7-2f35-4454-9781-a15ed2f792ff@p25g2000hsf.googlegroups.com...

I am looking for some ideas. I have an answering machine runnning off
a 12 VDC transformer.

Whenever power goes out, I have to turn it back on. (Recording is
still kept)

It draws 200 ma of current which I calculate to be V x A = 6 watts.

Could I use 8 D size 1.5 V batteries?
Do they make a 12 volt UPS ?

Thanks.

Get a 12 volt rechargeable battery pack with a charger.
Run your device from a battery that is being charged at a greater rate than
you are using.
In event of a power failure the device doesn't know the difference.

BTW check your power calculation.

 

[Paul E. Schoen]

"Tim Wescott" <tim@seemywebsite.com> wrote in message
news:JMCdnfRlvZCk2QrVnZ2dnUVZ_t7inZ2d@web-ster.com...

Dave, I can't do that wrote:
On Aug 4, 6:00 am, NoS...@daqarta.com (Bob Masta) wrote:

Thanks Bob and everyone else who replied. OK, so no breaking news here
about me being a newbie. <grin> I didn't think the circuit would have
much bearing on the case other than lower power needed by the CMOS
version.

I didn't bother with a link to the circuit since low power is not an
issue with my application.

However I do need an operating frequency of 5KHz and 1-uS pulse width
at the lowest setting.

Here's the schematic...
http://www.discovercircuits.com/DJ-Circuits/simplepwm2.htm

Thanks

Dave

That circuit uses the output voltage to feed the threshold and trigger
pins. My (ancient) TI data book lists the NE555 as having a guaranteed
maximum output voltage of 3.3V with VCC = 5V, and a threshold voltage
that can go as high as 4.2V -- which means that if you get this
combination you'll never get there from here.

OTOH, CMOS pretty much goes to the power rail.

I wouldn't do this with a TTL part. I would either use a circuit that
works off of the 'official' discharge output, or I would use one 555 as
an astable multivibrator to establish the frequency, and another one as a
monostable multivibrator to establish the on (or off) time.

You can get around the limited output voltage swing by adding a 1k resistor
from pin 3 to +5V. Also, the supply voltage needs to be bypassed near the
IC with a small 100nF or so capacitor in addition to the 100 uF shown. And
a similar bypass capacitor from pin 5 to GND is recommended for control
voltage stability, and you can add a resistor to GND to lower the threshold
and trigger to work better with the reduced output swing.

An even better circuit for motor control is the H-bridge, an example of
which is referenced in a link on the website you listed:
http://library.solarbotics.net/circuits/driver_4varHbridge.html

I have a DC motor control demo board from Microchip that uses an H-bridge
with PWM to accomplish forward and reverse motor operation and dynamic
braking (which the 555 circuit does not have). It uses four MOSFETs and a
PIC16F684, and can even be controlled via a PC serial port and a simple
Windows GUI:
http://ww1.microchip.com/downloads/en/AppNotes/00893a.pdf
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2125&param=en026704

Good luck,

Paul

 

[Phil Allison]

<mrdarrett@gmail.com>

The one I'm looking at right now says 100-240V @ 1.6A input (160W
in?), and 65W output (19V @ 3.42A)

(Are they really only 40% efficient?)

** So you are still bamboozled by the difference between VA and watts.




...... Phil

 

[Phil Allison]

"Joerg"

mrdarrett@gmail.com wrote:

The one I'm looking at right now says 100-240V @ 1.6A input (160W
in?), and 65W output (19V @ 3.42A)

(Are they really only 40% efficient?)


It's higher, just means that the power factor must be quite ghastly.

** Not at all.

Just the usual rms to average ratio current of a rectifier and capacitor
filter - has a PF of about 0.5

While a good meter may measure 1.6A input current a watt meter won't
measure as high as 160W.

** Often, the amp draw rating refers to the size of the AC fuse.

Eg, my PC monitor is rated at 240 volts and 2 amps, but in fact draws only
0.6 amps rms and 56 watts.


...... Phil

 

[Phil Allison]

<mrdarrett@gmail.com
"Phil Allison"

The one I'm looking at right now says 100-240V @ 1.6A input (160W
in?), and 65W output (19V @ 3.42A)

(Are they really only 40% efficient?)

** So you are still bamboozled by the difference between VA and watts.



If the device employs power factor correction, the difference between
VA and Watts goes to zero, right?

** Completely irrelevant reply.

Try again sometime, pal.



....... Phil

 

[Fleetie]

From a quick look, I make it:

R = Sigma (n=1 -> n=(N-1)) { 1/n }

N is the number of nodes along a length of the square.

So for N=4 (a 4 x 4 grid):

R = 1 + 1/2 + 1/3 = 11/6 ohms.

For N=5:

R = 1 + 1/2 + 1/3 + 1/4 = 25/12 ohms.

I got that by drawing diagonal lines; I think all points on each
diagonal line are at the same potential, so all points on a line can
be treated as one node.

So from the first corner to the first diagonal line (which links 2
nodes), there are 2 resistors in parallel, so the resistance is 1/2 ohm.

That is in series with the resistance between the 1st diagonal line (2 nodes)
and the second diagonal line (3 nodes), so there are 4 paralleled resistors
between those 2 diagonal lines, so another 1/4 ohm.

Continue and you get the expression above.

I think.


Martin

 

[christofire]

"The Phantom" <phantom@aol.com> wrote in message
newsanf941hg6o7jdktb2bo7vknvpi5agk6jr@4ax.com...

Imagine a rectangular grid of 1 ohm resistors, 3 on a side like this:

A ___ ___ ___
|-|___|-|-|___|-|-|___|-|
.-. .-. .-. .-.
| | | | | | | |
| | | | | | | |
'-' ___ '-' ___ '-' ___ '-'
|-|___|-|-|___|-|-|___|-|
.-. .-. .-. .-.
| | | | | | | |
| | | | | | | |
'-' ___ '-' ___ '-' ___ '-'
|-|___|-|-|___|-|-|___|-|
.-. .-. .-. .-.
| | | | | | | |
| | | | | | | |
'-' ___ '-' ___ '-' ___ '-'
|-|___|-|-|___|-|-|___|-|
B


Now expand the grid so it's 20 resistors on a side. What is the
resistance
between diagonally opposite corners A and B?

Does anyone see a shortcut method?

The infinite grid is the one often posed and solutions are to be found on
the web, for example http://www.geocities.com/frooha/grid/node2.html. A
finite rather than infinite grid can be worked in by setting limits
appropriately. I don't know if that leads to a short-cut - give it a go!

The one we were given at Uni was to take an infinite grid of squares of 1
ohm resistors, remove one resistor and calculate the resistance between the
two points to which that resistor would have been connected. Again, the
solution can be found on the web, for example
http://stevensholland.com/challenge-problem-solution-from-jan-19th-2007/.

Chris