Chip with simple program for Toy

Rich,

Thanks for sending me to the right spot.

Your explanation may have helped a little, but it raises a question....

A search on Digikey for SOT23 PNP 3906 parts yields results for both
+V&I parts and -V&I parts. Are they different or is that the different
companies using holes vs electrons? (Confusing because Fairchild has
one of each.... different tech writers?)

Or simpler words a PNP 3906 part is a PNP 3906 part.

Thanks,

John

 

[Alan B]

On Fri, 04 Aug 2006 20:17:39 GMT, in message
<DXNAg.177$sH.45@newsfe1-win.ntli.net>, "Genome" <mrspamizgood@yahoo.co.uk>
scribed:

It's not as if life was any better when capacitors looked like liquorice
allsorts and I'm damned sure you couldn't claim anything about which way to
stick the buggers in since the stripes were horizontal!!!!!!

Zoloft prescription's run out, then?

 

[Michael A. Terrell]

Alan B wrote:

On Fri, 04 Aug 2006 20:17:39 GMT, in message
DXNAg.177$sH.45@newsfe1-win.ntli.net>, "Genome" <mrspamizgood@yahoo.co.uk
scribed:

It's not as if life was any better when capacitors looked like liquorice
allsorts and I'm damned sure you couldn't claim anything about which way to
stick the buggers in since the stripes were horizontal!!!!!!

Zoloft prescription's run out, then?

No, he's upset that his favorite lingerie store can't sell him what
he wants.

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Alan B]

On Wed, 02 Aug 2006 01:52:06 GMT, in message
<44D00514.F6DCB925@earthlink.net>, "Michael A. Terrell"
<mike.terrell@earthlink.net> scribed:

ragtag99 wrote:

Thanks for taking the time to look at this post. I am new to the field
but we all had to start at some point somewhere right.

I'm trying to study on my own and I came across this web page
http://library.thinkquest.org/10139/small/electro4.html and the very
last question, just scroll all the way to the end and theres a
'challenge question', I don't know where im going wrong. My answers
aren't the same as the answers given. Could someone instruct me on how
to solve that very very primative cirucit.

Also could someone give me a practical example of why you need to know
Ohms law, which i am studying on faith alone right now. Would it be
something along the lines of "I have X component which runs on Y amps
but I have 3Y amps running though, what resistance would i need" or
something like that? Or am i way off.

Thanks for any help.

Jesse


Jessie, newbie questions should be asked in
news:sci.electronics.basics

Don't know if Jesse made it over here or not, but here goes.

The "challenge question" is a combination series-parallel circuit. The
trick is to figure out which part is which, separate the parts, solve
separately, then recombine for the final calculation. This particular
problem requires a 3-step process. I won't give away more, so that you can
try to get it for yourself.

About Ohm's law: it's a fundamental. It's like learning scales so that you
can play and understand music. It's like learning what the parts of speech
are so that you can learn to speak a language. It's like learning
addition, subtraction, multiplication and division so that you can do your
own tax returns. Without knowing and understanding Ohm's law, you'll have
no idea how to get around in electronics.

 

[Alan B]

On Sat, 05 Aug 2006 01:48:11 GMT, in message
<44D3F8D2.27902769@earthlink.net>, "Michael A. Terrell"
<mike.terrell@earthlink.net> scribed:

Alan B wrote:

On Fri, 04 Aug 2006 20:17:39 GMT, in message
DXNAg.177$sH.45@newsfe1-win.ntli.net>, "Genome" <mrspamizgood@yahoo.co.uk
scribed:

It's not as if life was any better when capacitors looked like liquorice
allsorts and I'm damned sure you couldn't claim anything about which way to
stick the buggers in since the stripes were horizontal!!!!!!

Zoloft prescription's run out, then?

No, he's upset that his favorite lingerie store can't sell him what
he wants.

Ah, well then, Genome, just put in your favorite Eddie Izzard DVD, have a
good laugh, and all will be better with the world! And oh by the way, how
do you define horizontal and vertical on a cylinder that could be placed
any which-way? Did you perhaps mean "lengthwise?"

 

[Dr. Anton T. Squeegee]

In article <1154856361.566469.79490@h48g2000cwc.googlegroups.com>,
PeterSmith1954@googlemail.com (known to some as PeteS) scribed...

maTheMatic wrote:
Hi,guys
I am a little confused about definition of clock/oscillator
stability. it is x ppm over some temperature range in common spec and
there usally another aging spec in addion to stability, so I assume the
stability was not very related with the measuring duration. but
recently I am read some material about atom clock which used in gps,
and they specify the stability with a duration(short or long) and it
seemed they assuming some unchanged temperature. so can any one help
me clarify the concept or recommend some reference?

x-posted to and followups set to sci.electronics.basics

Oscillator specs and crystal specs (often used as the frequency setting
element) vary a little.

Crystal specs usually state their stability across temperature, loading
capacitance, cal tolerance (initial accuracy) and long term ageing.

<snippety>

Great description, but one minor nitpick: There's no 'e' in the
word 'aging.' ;-)

Keep the peace(es).


--
Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute
(Known to some as Bruce Lane, KC7GR)
http://www.bluefeathertech.com -- kyrrin a/t bluefeathertech d-o=t calm
"Salvadore Dali's computer has surreal ports..."

 

[Tom Biasi]

"Dr. Anton T. Squeegee" <SpammersBlow@dev.null> wrote in message
news:MPG.1f3fb1deed5299699896f0@news.drizzle.com...

snippety

Great description, but one minor nitpick: There's no 'e' in the
word 'aging.' ;-)

OK, deduct 2 points from his post.

 

[John Woodgate]

In message <pan.2006.08.08.17.54.11.361661@example.net>, dated Mon, 7
Aug 2006, Rich Grise <rich@example.net> writes

I am kind of wondering what it is you intend to accomplish here.

What he's liable to accomplish is suicide, if he doesn't use an
isolation transformer for the tube supply.
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

 

[Don Klipstein]

In article <pan.2006.08.08.17.54.11.361661@example.net>, Rich Grise wrote:

[crossposted: sci.electronics.design,sci.electronics.basics
followups-to: sci.electronics.basics]

On Mon, 07 Aug 2006 08:40:09 -0700, siliconmike wrote:

I'm a newbie on ballasts

However I'd like to play around with the voltage waveform after a tube
lits up.

For example providing a triangle wave (instead of sine) voltage to the
tube at various amplitudes etc.

So, how does a typical voltage waveform look across a typical tube?
And how does a current waveform look for current flowing into a typical
tube?

And next, how can I make / integrate a ballast that will shoot the
waveform immediately after the tube lits up?

Any hints/ advise / discussion / pointers would be greatly appreciated.

The voltage waveform will spike up to the ignition voltage of the plasma,
and then plummet to practically zero when the plasma starts to conduct.

Plasma has a negative resistance - when the current flow increases, the
voltage drop decreases.

Plasma does indeed usually have "negative resistance", but voltage drop
in response to a change in current is often positive initially and then
drops. Voltage waveforms actross a discharge lamp receiving AC can
indicate positive resistance or be just distorted as the discharge
responds to a current change. If the frequency is low enough, the
"negative resistance" characteristic will show up.

Sometimes this is a severe oversimplification, but the "negative
resistance" can be described as explainable by the plasma becoming more
conductive as its temperature increases.

- Don Klipstein (don@misty.com)

 

[siliconmike]

Rich Grise wrote:

[crossposted: sci.electronics.design,sci.electronics.basics
followups-to: sci.electronics.basics]

On Mon, 07 Aug 2006 08:40:09 -0700, siliconmike wrote:

I'm a newbie on ballasts

However I'd like to play around with the voltage waveform after a tube
lits up.

For example providing a triangle wave (instead of sine) voltage to the
tube at various amplitudes etc.

So, how does a typical voltage waveform look across a typical tube?
And how does a current waveform look for current flowing into a typical
tube?

And next, how can I make / integrate a ballast that will shoot the
waveform immediately after the tube lits up?

Any hints/ advise / discussion / pointers would be greatly appreciated.

The voltage waveform will spike up to the ignition voltage of the plasma,
and then plummet to practically zero when the plasma starts to conduct.

Plasma has a negative resistance - when the current flow increases, the
voltage drop decreases.

I am kind of wondering what it is you intend to accomplish here.

Good Luck!
RIch

So any reference to VI curve for a plasma?
Does it also store energy - in that case the V and I would have a time
dependence - is that so?

 

[Don Klipstein]

In article <1155020804.837092.41700@p79g2000cwp.googlegroups.com>,
siliconmike wrote:

Rich Grise wrote:
[crossposted: sci.electronics.design,sci.electronics.basics
followups-to: sci.electronics.basics]

On Mon, 07 Aug 2006 08:40:09 -0700, siliconmike wrote:

I'm a newbie on ballasts

However I'd like to play around with the voltage waveform after a tube
lits up.

For example providing a triangle wave (instead of sine) voltage to the
tube at various amplitudes etc.

So, how does a typical voltage waveform look across a typical tube?
And how does a current waveform look for current flowing into a typical
tube?

And next, how can I make / integrate a ballast that will shoot the
waveform immediately after the tube lits up?

Any hints/ advise / discussion / pointers would be greatly appreciated.

The voltage waveform will spike up to the ignition voltage of the plasma,
and then plummet to practically zero when the plasma starts to conduct.

Plasma has a negative resistance - when the current flow increases, the
voltage drop decreases.

I am kind of wondering what it is you intend to accomplish here.

Good Luck!
RIch

So any reference to VI curve for a plasma?
Does it also store energy - in that case the V and I would have a time
dependence - is that so?

The plasma stores heat energy to some extent and its resistance has a
bigtime negative temperature coefficient. As a result, discharge lamps
easily have significant time dependence in V-I characteristics.

- Don Klipstein (Jr) (don@misty.com)

 

I am kind of wondering what it is you intend to accomplish here.

well if you convert an ac ballast to dc it makes nicer 'un flickered' photos
when you taking a few for high times mag. so maybe its something to adjust
growth patterns a little?

 

[KC]

Hi,

In the Netherlands there is a manufacturer with very good power
supplies

Take a look at: http://www.deltapowersupplies.com/

A 30V / 5A PSU will cost more than your friends budget. The Delta
30V/5A (ES 030-5) price about EUR.450

We are using over 10 Delta PSU without any major problems. Some of them
are over 10 years old.

Regards, Kees

 

[Alan B]

On 15 Aug 2006 10:32:26 -0700, in message
<1155663146.428371.85930@74g2000cwt.googlegroups.com>, "The Flavored Coffee
Guy" <elgersmad@rock.com> scribed:

Dell's Laptop Battery violates either the first or second laws of
thermodynamics.

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

http://news.com.com/2061-11199_3-6105653.html

Stupendous news! Will you be posting your hypothesis soon?

 

[Michael A. Terrell]

Alan B wrote:

On 15 Aug 2006 10:32:26 -0700, in message
1155663146.428371.85930@74g2000cwt.googlegroups.com>, "The Flavored Coffee
Guy" <elgersmad@rock.com> scribed:

Dell's Laptop Battery violates either the first or second laws of
thermodynamics.

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

http://news.com.com/2061-11199_3-6105653.html

Stupendous news! Will you be posting your hypothesis soon?

Where have you been? he has posted his drivel on the electronics
newsgroups for years.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Alan B]

On 17 Aug 2006 10:57:04 -0700, in message
<1155837424.506504.9260@i3g2000cwc.googlegroups.com>, "The Flavored Coffee
Guy" <elgersmad@rock.com> scribed:

Mark Fortune wrote:
The Flavored Coffee Guy wrote:
Dell's Laptop Battery violates either the first or second laws of
thermodynamics.

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

http://news.com.com/2061-11199_3-6105653.html


Just where exactly does it suggest that?

Just follow this link:
http://www.theinquirer.net/default.aspx?article=32550

So, you're suggesting travelers avoid synthetic fiber blends in their
clothing? Good idea, Dell laptops or no.

 

[MikeA]

darkreality wrote:
<snip>

THIS IS ABSOLUTELY LEGAL! You are requesting a legitimate

service and you are paying for it! Like most of us I was a little
skeptical and a little worried about the legal aspects of it all. So I
checked it out with the U.S. Post Office (1-800-725-2161) and they
confirmed that it is indeed legal.

I was a little skeptical too so I printed your message and sent it to
the FBI for their opinion. I'll let you know what I found out.

 

[JeffM]

I have a home irrigation controller
Imran Khan

Yes, I seem to have read that before:
http://groups.google.com/groups/search?filter=0&q=insubject:transistor&enc_author=hSmEcR4AAAAJBV5fu91W81q55jVVANXFAG1snRRmtkc2-Zuq7Zp-kA&scoring=d

Here's how you should have done it:
http://groups.google.com/group/sci.electronics.basics/browse_frm/thread/7b7c0624331012bb/3958f18673b5f374?q=EVERY-group-*-*-*-*-*-*-*-*-appear+*-proper-answer-*-*-*-given+much-easier-*-*-*-*-what's-going-on+*-frowned-on+*-correcting+*-polite-*-mention-*-*-*-*-*-*-*+*-*-_perfect_-*-*-*-*+*-Followup-To-*+*-*-*-too-lazy-*-*-*-*-*-appropriate-*+Just-because-*-*-*-*-*-*-*-*-does-not-mean-*-*-*-*-*-*+*-*-*-*-two-groups-*-*-aren't-*-different

 

[jasen]

On 2006-08-21, Imran <messenger_boy_2005@hotmail.com> wrote:

I have a home irrigation controller hat has gone faulty on one of the zones,
I have opened it up and have found one of the transistors to be faulty there
is a number on the transistor but it looks like its a part number from the
manufacturer of the irrigation unit rather then the actual part number of
the transistor.

The number written on it is 1401ES or 1401E5 cant make out if its a 5 or an
S but looks like an S to me and sound like it might be an NPN transistor.

those things are often AC, are you certain it's not a triac?

The purpose of this transiston from what I can tell from the board is to
turn a solenoid on and off.

If you can tell the current and voltage the solenoid operates at that would
help. (or the current output of the power supply for the irigation unit...)

The Irrigation unit is made by Holman Distributors.

that's a novel name for a manufacturer.

Bye.
Jasen

 

[Michael A. Terrell]

ineedyourhelpp wrote:

Respected Sir/Madam,
I am Disable Person right from the beginning of my childhood from Polio
attack which affected my both legs. I need yours only 1 CLICK on my
URL/link who have on this web page
http://ready.5u.com/typeinternatonal.htm . This is yours help with me
and for this I will be very Thankful to you.

Regards

Gee, you can afford broadband, and you're begging for money. What's
wrong with this picture?


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida