Chip with simple program for Toy

[Patrick Leonard]

Well, as the OP, I certainly don't want to incite any flame wars. Ultimately
what I wanted was indeed a theoretical explanation on why my idea wouldn't
work.

I didn't really want a "black box" explanation - I don't know how ICs work
so the idea was that I'd build an oscillator using something that I was
familiar with - transistors. Of course, I tried my circuit out, saw that it
didn't work, and realized my transistor understanding was incomplete. It was
explained that since transistors conduct linearly, it ends up reaching
equillibrium. Okay, cool, thanks.

- Patrick

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message
news:3F077501.A03FAC25@earthlink.net...

Roger Johansson wrote:

Kevin is a bitch, who likes to show off his superior knowledge in the
electronics field, and his talent for a friendly and constructive
cooperation with beginners is close to non-existent.

--
Roger J.

Roger, Kevin is only here to push his Spice software. Remember all
his attacks on Mike, when he was on the electronics newsgroups answering
questions about the free Switchercad software? Rather than offer help,
he spent all his time ranting that only his GUI for Spice was usable,
and you had to be a moron to use anything else. A lot of people have
him kill filed for this. On the design groups he routinely attacks
people with years of practical design experience, rather that discuss
differences in design philosophies.
--


Michael A. Terrell
Central Florida

 

[Michael A. Terrell]

Patrick Leonard wrote:

Well, as the OP, I certainly don't want to incite any flame wars. Ultimately
what I wanted was indeed a theoretical explanation on why my idea wouldn't
work.

I didn't really want a "black box" explanation - I don't know how ICs work
so the idea was that I'd build an oscillator using something that I was
familiar with - transistors. Of course, I tried my circuit out, saw that it
didn't work, and realized my transistor understanding was incomplete. It was
explained that since transistors conduct linearly, it ends up reaching
equillibrium. Okay, cool, thanks.

- Patrick

Don't worry about it. There are a few people here with a hair
trigger, but if you want to learn electronics, ask queestions and read
electronics books. Start with a copy of the ARRL handbook. It is
intended for ham radio operators but it has some basic electronics in
it, and should be available in you local school or public library.

--


Michael A. Terrell
Central Florida

 

[Patrick Leonard]

Well, actually, in the fall I will be beginning my 2nd year of electrical
engineering.

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message
news:3F07BDCB.A55A8A45@earthlink.net...

Patrick Leonard wrote:

Well, as the OP, I certainly don't want to incite any flame wars.
Ultimately
what I wanted was indeed a theoretical explanation on why my idea
wouldn't
work.

I didn't really want a "black box" explanation - I don't know how ICs
work
so the idea was that I'd build an oscillator using something that I was
familiar with - transistors. Of course, I tried my circuit out, saw that
it
didn't work, and realized my transistor understanding was incomplete. It
was
explained that since transistors conduct linearly, it ends up reaching
equillibrium. Okay, cool, thanks.

- Patrick

Don't worry about it. There are a few people here with a hair
trigger, but if you want to learn electronics, ask queestions and read
electronics books. Start with a copy of the ARRL handbook. It is
intended for ham radio operators but it has some basic electronics in
it, and should be available in you local school or public library.

--


Michael A. Terrell
Central Florida

 

[Kasper]

Hey

Tjeck elektor, i mean they have a schematic on a fine Cap meassure...
building with a pic and a display.. auto range and so on...

let me know if you are interastead, then i can mail you the article, i mean
i still haved it

--
Mvh Kasper

Tjek Elektronik Chatten pĺ -> http://www.angelfire.com/alt/elektronik/
"tempus fugit" <tocatta.no.spam@ciaccess.com> skrev i en meddelelse
news:rwGNa.51417$hr3.27020@news.primus.ca...

Hey all;

I'm thinking of buying either an ESR meter or capacitance meter, but am
not
sure which is more useful. I would be using it mostly for troubleshooting,
so I was thinking ESR meter, since it is my understanding that a cap is
more
likely to fail or cause problems because of high ESR rather than incorrect
capacitance.

Any advice?

Thanks

 

[Michael Black]

Larry Hatch (lhatch@flite.net) writes:

My son wants a robot and I have a remote I would like to use a couple
buttons to tell it forward, back, left, right, stop.

My thought was build a IR detector, drop a AVR mega8 (microcontroller)
in and get 0 and 5 to it from the IR signal. Have the input on the uC
learn the buttons and turn on drivers to the motors. I doubt RadioShack
has that type stuff now. Any simple IR detector ideas. I have IT
receiver LED in my box somewhere, and photo diodes as well.

Find a VCR or a cable converter, and pull the IR interface out of it.

On Jerrold cable converters, they are a couple of dollars at garage sales
here and I've even found them in the garbage, the IR detector and amplifier
IC are pretty much a module that you can pull out and use by itself.
The one I pulled out used an IC that I could find in the ECG replacement
guide, so it was real easy to find where to attach power and ground, and
take the output signal. In that particular case, it's not a tuned amplifier,
which may not be the best situation for some uses. For mine, testing
remotes, it worked out fine since I didn't have to worry about whether the
carrier frequency was the same.

I haven't paid much attention to the IR interface in VCRs, but likely it's
a similar situation, if it isn't as easy to extract.

Michael

 

[happyhobit]

Hi Larry,

Your remote is probably a 38kHZ. (no guarantees)

For Infrared detectors you can use TSOP48xx, GB1U52X or PNA46xx. Rat Shack
has the GB1U52X they call it a 276-640.

They contain a photo pin diode, an input amp, Automatic Gain Control (AGC),
a bandpass filter, a demodulator and an output driver.

Jay

"Larry Hatch" <lhatch@flite.net> wrote in message
news:vgga5622m7c8c2@corp.supernews.com...

My son wants a robot and I have a remote I would like to use a couple
buttons to tell it forward, back, left, right, stop.

My thought was build a IR detector, drop a AVR mega8 (microcontroller)
in and get 0 and 5 to it from the IR signal. Have the input on the uC
learn the buttons and turn on drivers to the motors. I doubt RadioShack
has that type stuff now. Any simple IR detector ideas. I have IT
receiver LED in my box somewhere, and photo diodes as well.

 

[Mike]

On Sun, 6 Jul 2003 05:57:27 -0700, JohanWagener wrote:

What can be used as an element in a simple homemade kettle running off
220V?

The simplest approach would be to add salt to the water. Then, just put the
wires in the water, and adjust the salt content until the desired heating
time is achieved. Make sure you use a glass kettle. When the water is
heated, simply remove the salt and make your tea. The salt is reusable.

I suppose you could use a resistor, but that wouldn't be nearly as
interesting.

-- Mike --

 

[JohanWagener]

You mean electrolysis? I don't want the H and O and Cl that might be formed
but thanks anyway. I also thought about that one.

 

[Larry Hatch]

happyhobit wrote:

Hi Larry,

Your remote is probably a 38kHZ. (no guarantees)

For Infrared detectors you can use TSOP48xx, GB1U52X or PNA46xx. Rat Shack
has the GB1U52X they call it a 276-640.

They contain a photo pin diode, an input amp, Automatic Gain Control (AGC),
a bandpass filter, a demodulator and an output driver.

Jay

"Larry Hatch" <lhatch@flite.net> wrote in message
news:vgga5622m7c8c2@corp.supernews.com...


My son wants a robot and I have a remote I would like to use a couple
buttons to tell it forward, back, left, right, stop.

My thought was build a IR detector, drop a AVR mega8 (microcontroller)
in and get 0 and 5 to it from the IR signal. Have the input on the uC
learn the buttons and turn on drivers to the motors. I doubt RadioShack
has that type stuff now. Any simple IR detector ideas. I have IT
receiver LED in my box somewhere, and photo diodes as well.




Thanks for your help. I will head to Rat Shack after I attempt to

remove one from an old VCR. I have photo diode. Maybe I will try that
into a 2n2222 and see what comes out and a 5.1V zener also, my son love
to tinker, or watch me.. Thanks again

 

[The Ronney's]

rgb <rgb@blahblah.blah> wrote in message
news:3F009A3C.3000208@blahblah.blah...

Hi,

I got a stepping motor and I need somme help to figure out wiring.

http://pages.infinit.net/blipblip/smotor.jpg


gray to yellow 14 MegO
gray to blue 19 MegO
gray to white 19 MegO
gray to orange 14 MegO

green and black and red 2 Ohm between all of them.

I used some bipolar motors but this one ... I don't know ...

Hi RGB,
I'm guessing that it is a three phase brushless DC motor. The
green/black/red leads are the three phase windings and the remainder are the
Hall Effect sensors. For the Hall Effect sensors, there will be one
positive power, one return and three signal wires. You are reading the
MegOhm readings because the Hall Effect sensors are not powered up.

Mind you, I'm only guessing it is a three phase brushless DC motor. I am
not familiar with the motor you have. You say that it is a stepper motor.
If you rotate the motor, do you feel detent "stops" or does it turn
smoothly? If you feel stops, I may well be wrong about my guess.

Martin Ronney

 

[JohanWagener]

HAHAHAHA BOOOOM! HAHAHA

"Keith R. Williams" <krw@attglobal.net> wrote in message
news:MPG.19720e123aee345498a51e@enews.newsguy.com...

In article <be9eij$rfc$1@ctb-nnrp2.saix.net>,
rebeldog@webmail.co.za says...
You mean electrolysis? I don't want the H and O and Cl that might be
formed
but thanks anyway. I also thought about that one.

Light a match.

--
Keith

 

[Henry Kolesnik]

So far calculation is OK but what is temp of water to start, what kind of
container, insulation, altitude and barometric pressure. Is the pot open
or closed, will the resistors be in the water or under the pot. Lots of
details. Why don't you just emerse the resistors in a beaker of ditilled
water and tell us?
73
hank wd5jfr
"JohanWagener" <rebeldog@webmail.co.za> wrote in message
news:be9kvh$1c3$1@ctb-nnrp2.saix.net...

Please comment on my calculations

If I take two 10W resistors of 1k each and put them in parallel I would
get
a 500ohm resistor right? Now if I apply 220V over it there would be about
0.44A flowing through it. That is power of about 98.6W. How long will it
take to boil 500ml of water?

 

[John Larkin]

On Sun, 06 Jul 2003 06:33:34 GMT, "Patrick Leonard"
<transactoid@rogers.com> wrote:

Well, actually, in the fall I will be beginning my 2nd year of electrical
engineering.

Then they will probably introduce you to semiconductor theory and
transistor action. In my experience, a bit of private experimenting
with transistors, before and during the formal stuff, can be a
wonderful catalyst to really understanding things.

But you seem to be something of a throwback, what with using
capitalization and punctuation and manners. Keep it up!


John

 

[Patrick Leonard]

I may be in engineering, but I disagree strongly with the addage that we
must be an illiterate bunch

And I'm probably the only student who actually has an oscope at home and who
actually attempts to reproduce what the theories say. I get such a better
understanding when I correlate the math with the hands-on.


"John Larkin" <jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> wrote in
message news:rtoggvsmktcd1pqio08voiubraqva0tvso@4ax.com...

On Sun, 06 Jul 2003 06:33:34 GMT, "Patrick Leonard"
transactoid@rogers.com> wrote:

Well, actually, in the fall I will be beginning my 2nd year of electrical
engineering.


Then they will probably introduce you to semiconductor theory and
transistor action. In my experience, a bit of private experimenting
with transistors, before and during the formal stuff, can be a
wonderful catalyst to really understanding things.

But you seem to be something of a throwback, what with using
capitalization and punctuation and manners. Keep it up!

 

[Chuck]

Sounds like a homework problem if I've ever heard one!

"JohanWagener" <rebeldog@webmail.co.za> wrote in message
news:be9kvh$1c3$1@ctb-nnrp2.saix.net...

Please comment on my calculations

If I take two 10W resistors of 1k each and put them in parallel I would
get
a 500ohm resistor right? Now if I apply 220V over it there would be about
0.44A flowing through it. That is power of about 98.6W. How long will it
take to boil 500ml of water?

 

[DarkMatter]

On Sun, 06 Jul 2003 09:46:58 -0400, Larry Hatch <lhatch@flite.net>
Gave us:

My son wants a robot and I have a remote I would like to use a couple
buttons to tell it forward, back, left, right, stop.

My thought was build a IR detector, drop a AVR mega8 (microcontroller)
in and get 0 and 5 to it from the IR signal. Have the input on the uC
learn the buttons and turn on drivers to the motors. I doubt RadioShack
has that type stuff now. Any simple IR detector ideas. I have IT
receiver LED in my box somewhere, and photo diodes as well.

Rat Shack has a yard light switch that is IR, and has a fresnel
lens. The whole thing is cheap, and contains circuitry that you
probably want to use. You have to find out what it get powered by
locally (at the PCB) as it is an AC device. You don't need all that
AC stuff in there.

Aside from that, the device you want for doing it yourself is called
a resistor bolometer. and comes in several canned transistor packages.

Some have FET front ends on them already. Not cheap, those.

Then, you need the proper IR window, for the type of work you are
doing. You can determine what you need, and usually just by the right
pre-windowed bolometer.

Your IR led device may work, depending on the wavelength you are
interested in. It would be strictly binary in nature though,
providing no difference in output for different temperatures. A
simple yes/no, is it there, is it not there switch.

 

[John Larkin]

On Sun, 06 Jul 2003 19:30:09 GMT, "Patrick Leonard"
<transactoid@rogers.com> wrote:

I may be in engineering, but I disagree strongly with the addage that we
must be an illiterate bunch

And I'm probably the only student who actually has an oscope at home and who
actually attempts to reproduce what the theories say. I get such a better
understanding when I correlate the math with the hands-on.

Alas, your promising career... dashed! by the evil of top-posting.

John

 

[DarkMatter]

On Tue, 01 Jul 2003 23:58:44 -0700, DarkMatter
<DarkMatter@thebarattheendoftheuniverse.org> Gave us:

There is now an updated version posted.

Reposted due to request.

alt.binaries.pictures.misc

alt.binaries.schematics.electronic

alt.binaries.schematics.electronics

 

[Howard Henry Schlunder]

"JohanWagener" wrote in message news:be9kvh$1c3$1@ctb-nnrp2.saix.net...

Please comment on my calculations

Ok.

If I take two 10W resistors of 1k each and put them in parallel I would
get
a 500ohm resistor right?

Yes. The combination will be designed to dissipate 20W as well. Submerged
in water, however, it probably still last a long time.

Now if I apply 220V over it there would be about
0.44A flowing through it. That is power of about 98.6W.

Yes and yes.

How long will it take to boil 500ml of water?

Assuming the water starts at 25 degrees Celcius, you are at 1 atmosphere of
pressure, and no energy will get lost to the surrounding air/containers/or
otherwise, it will take:

(100Degrees - 25Degrees)*(500cm^3)*(4.19Jewels/Degree/cm^3)/(98.6
Jewels/Second) = 1594 Seconds.

Note that this is the time it will take to reach boiling point. The heat of
vaporization of water is way higher than it's specific heat in the liquid
phase. Therefore, if by "boil" you mean, "completely boil away" my
calculation would be an extreme underestimate. Unfortunately, I don't
remeber the heat of vaporization right off hand, so I can't provide you with
any calculations there.

Howard Henry Schlunder




-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 80,000 Newsgroups - 16 Different Servers! =-----

 

[John Larkin]

On Sun, 06 Jul 2003 22:53:30 +0100, Terry Pinnell
<terrypinDELETE@dial.pipexTHIS.com> wrote:

"Kevin Aylward" <kevin@anasoft.co.uk> wrote:

A relaxation oscillator of this sort is not possible with a normal
transistor in a normal circuit, to my knowledge. You can do this with a
unijunction one. Well, actually, you might get one to work in avalanche
mode. You drive the CE through a resister, with a cap across the CE, and
^^^^^^^^

let it break down, which discharges the cap. I have never tried this, so
there may be some catch.

I would move on to solving some more usefull problems.
^^^^^^^
I would move on to learning either how to spell or to use your spell
checker.

Oh, relax. This isn't an English Composition class.

John