Chip with simple program for Toy

Look pinhead, "AC" stands for "alternating current" not "alternating".
"DC" stands for "direct current" not "constant".....Don't blame me that
both include the word "current".....don't blame me that "AC" and "DC"
have been bastardized to mean "with frequency" and "zero
frequency".....now go climb back under than rock and go back to
alternating your wrist action.....

 

[John Larkin]

On Sat, 11 Jun 2005 23:02:05 GMT, Rich The Newsgroup Wacko
<wacko@example.com> wrote:

No, but it might educate some of the self-proclaimed "engineers" who
claim that the two opposite poles of the 240 center-tapped are "180
degrees out of phase." They are not "out of phase" - they are simply
opposite polarity! It's a significant difference, in the realm of
phasors and imaginary power and stuff.

OK, what would a pair of sine waves look like if they *were* 180
degrees out of phase? How would they be different from a pair of sine
waves that were "simply opposite polarity"? [1]

John [2]

[1] there's a relevant trig identity somewhere, I think

[2] self-proclaimed "engineer" [3]

[3] except for the BSEE, which makes me an
other-proclaimed "engineer"

 

[John Doe]

"Michael A. Terrell" <mike.terrell earthlink.net> wrote:

John Doe wrote:

Apparently, consumer demand for greater capacity does not figure
into your equation. In fact, demand for greater capacity
increases.


Consumer demand has nothing to do with it. You can demand
anything you want but until its feasible to build at a
reasonable price, it won't exist. All any consumer can do is
chose the an item somewhere in the range of what is offered.
I'd love to have a 100 million terabyte data storage system with
a 1024 bit wide buss and under a pico second access time, but it
isn't going to happen in my lifetime. I'll be lucky if I live
long enough to see really good OCR software.


Snip a lot of nonsense.


... the electronics is always much faster than the hardware, so
multiple platters means faster data transfer.


Really? It takes time to switch between heads, verify the head
location, synchronize the servo and collect the data. It would be like
reading more books at the same time, rather than finishing one before
starting another.

More heads slows it down unless you are reading each entire platter
at once, one side at a time. I have never seen this, even in the old 5
MB hard drives that I started with. If you want more speed you use RAID
arrays where you have multiple drives synched, and switch data access
between them.

--
Link to my "Computers for disabled Veterans" project website deleted
after threats were telephoned to my church.

Michael A. Terrell
Central Florida

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[ahonda55]

i have just got some info about voltage devider and i think it i
exactly what i want , i will try it :

sorry for annoying ;

 

[John Beardmore]

In message <1130490715.159698.124860@f14g2000cwb.googlegroups.com>,
lucasjensen@gmail.com writes

I have a crazy idea:

1. On my self suppored bicycle trips around the world I want to use a
digital camera.
2. I have faced reality and accepted that most digital cameras use
Li-Ion batteries, which makes them very small and handy.
3. Currently I'm interested in a Sony DSC-T7 which uses a Li-Ion
battery. The battery specs can be found here:
http://www.calcellular.com/np-fe1.html
4. I don't want to carry a regular charger but I want to use either a
regular bike generator (the ones powering for front and rear light on a
bicycle), solar cells or a home-built mini wind mill which can be
mounted on the bicycle and produce electricity during the night.

You might find this site vaguely interesting.

http://www.innertuba.org.uk/Technologies.htm#solar


Cheers, J/.
--
John Beardmore

 

[DBLEXPOSURE]

I do as I please. You, on the other hand, can fuck right off and die.

"fuck right off and die." Well that is original. Came up with that all on
your own?

You guys

There's more than one of me?

Unfortunately, yes.

k0oKsign!!!!1!

Don't know what the fuck that is.. lol, A sign all unto it's own.

And by the way the second post was done only after I found that you had
cross posted this thread in alt.photography and 5 other NG's where it is
completely irrelevant. A troll sing of the largest magnitude. You should
go in those NG's a write a formal apology for trolling them.

You can keep the thread alive if you wish to amuse yourself further but from
this end you are plonked out of the picture.






"Kadaitcha Man" <nospam@fuck-off-and-die.com> wrote in message
news:38b8abaea5704662b8d7a76fe57e5308@news.admin.gumming.idler...

DBLEXPOSURE, <celstuff@hotmail.com>, the bulbous, tuberculate goggle-eye,
and needle and pin sharpener, griped:
Oh Great, a buttinski...

look, I post a completely relevant reply to a question and this guy
comes along and whines about my post without offering up any relevant
points that pertain to the question asked and then has the gall to
tell me that my post is not relevant and does as he is God's gift to
the NG, He gets both barrels.

That's a very long sentence. k0oKsign!!!!1!

a dose of his own crap. I do not enjoy
having to flame a troll but I will always stand my ground. If you
don't want endless threads of tit for tat insults then don't troll
the NG.

I do as I please. You, on the other hand, can fuck right off and die.

You guys

There's more than one of me?

remind me of the guy with two black eyes, you cant tell him
anything cause you already told him twice.

Did you think that one up all by yourself?

--
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Fnflfezvnmlibdxmiffvixfezmxmirflfczftiztqfizxwblbplfmhqbti.Rfqfvvmptmv
Zvcemnatksmtamskitvrvcwdckncfmkcrrvucaprvmms,zchtncadfmk,wkmtms.Tvrvpk

 

[Rich, Under the Affluence]

On Fri, 04 Nov 2005 06:14:35 -0800, hrhofmann wrote:
....

picks up the EMI and does not respond to sound. That is just the
opposite of what most people want, but having done EMI work for many
years, the sounds of something working are very interesting. If you
have an old LED display pocket calculator, try using that as a noise
source, Listen to the difference between adding two numbers and
getting the logarithm of a number, for example. You can hear EMI noise
also from almost anything electronic.

Oh, talk about reminiscence time! Back in the salad days of 8008s and
8080s and 6500s, BYTE magazine, or one of the wannabes, published a
program that would play music through your transistor radio. It was
based on the 8080 instruction cycle time, I think. At the time, I only
had an 8008, so I wrote and hand-assembled a program to play tunes
through a speaker - I was chicken to try to figure out how to do it
by EMI. I _was_ awfully proud of my interleaved loops, however.

Cheers!
Rich

 

[Rich, Under the Affluence]

On Fri, 04 Nov 2005 17:03:09 -0500, jh top-posted:

Thanks for everyone for your ideas. I'll try some stuff (when I get a
chance; it might be a while) and post anything interesting. I'm hoping
to eventually (maybe after I learn more about electronics) build a
reasonably sensitive EMI-only "microphone" to use as a sort of computer
stethoscope.

Here's my idea: could a computer technician, with this tool and some
practice, hear and immediately recognize the EMI signature of a dying
power supply or other bad component, the same way an expert pilot can
instantly diagnose engine troubles just from their noises? Certainly,
many technicians can recognize the distinctive sound made by some dying
hard drives; but most components don't make any noise that we can hear
naturally.

If it were me and my resources, in this day and age, I wouldn't bother.
It's fun to probe around, and maybe play the sounds for your friends and
stuff, but I seriously doubt if today's micro-stuff could actually be
diagnosed by the sounds in the EMI. Well, you could hear an obviously
dead component, but there have been trouble-shooting methods for that
for decades.

For fun and education, yes definitely.

For a _real_ diagnostic tool, if you could pull it off, you could win
a Nobel prize. ;-P

Have Fun!
Rich

 

[Bob Agnew]

one more that I can think of :

In order to comply with FCC regulations Part 15 and other regualtions.

"Howard Long" <howard@howardlongxxx.com> wrote in message
news:dkg3eu$la6$1@nwrdmz02.dmz.ncs.ea.ibs-infra.bt.com...

"Jack// ani" <nospam4u_jack@yahoo.com> wrote in message
news:1131121871.161103.192160@g47g2000cwa.googlegroups.com...
Hi all,

Why is RF circuit shielded inside a metal case...like a cell phone,
where whole of the pcb and its components are shielded.

Five reasons I can think of:

1. To stop unwanted radiation exiting the device, possibly interfering
with
other devices (eg, local oscillators, unwanted mixing products,
harmonics);

2. To prevent unwanted radiation from external devices affecting the
device
(eg mixing products and image rejection, and for devices using external
antennas almost any digital device, and some analogue ones, in your
domicile);

3. To stop subsytems within the device interfering with each other (eg,
self-oscillation, unwanted mixing products).

4. Increased surface area decreasing the resistance due to skin effect.

5. Maintaining correct impedance in transmission lines.

Cheers, Howard

 

[Jeffrey]

I'm not too familiar with this stuff. Is there a specific chip you
suggest?

 

[Bob Monsen]

On Sun, 01 Jan 2006 08:30:23 -0800, Winfield Hill wrote:

A nice simple experiment. It should be noted that the LEDs are
effectively better than the diodes as a reference, because they
have a much higher voltage drop, and hence a much lower % change
with temperature. Also, some people use an LED as the reference
for a current source, using a transistor and resistor, wherein
the transistor's tempco nearly cancels the LED's tempco. Cool.

Well, I of course rush off to simulate this, and run into a problem: The
LED models I have all exhibit a positive Vf tempco. I tried the standard
ltspice LED models, plus some other models I picked up from the ltspice
group on yahoo.

Here is one of the models (although they all exhibit the same symptom.)

*Typ RED GaAs LED: Vf=1.7V Vr=4V If=40mA trr=3uS
..MODEL RED_LED D (IS=93.2P RS=42M N=3.73 BV=4 IBV=10U
+ CJO=2.97P VJ=.75 M=.333 TT=4.32U
+ Vpk=1.7V Iave=40mA type=LED)

I wonder if there is some simple correction I can make to the model?

--
Regards,
Bob Monsen

Zero is the number of objects that satisfy a condition that is never
satisfied. But as never means "in no case", I do not see that any progress
has been made.
- Poincare

 

[Rich Grise]

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

On Tue, 17 Jan 2006 08:44:25 -0800, kolev wrote:

Hello everyone!

I need to connect in series about 10 LED and supply them with a
constant current for a life test, but would not like to interrupt the
circuit if one breaks down...

Could you please give a hint if there could be a simple circuit to do
this, I was thinking of connection an appropriate Zener diode in
parallel of each LED?

Any help is greatly appreciated!

Put an appropriate resistor in series with each. The resistor should
be (Vsupply - Vled) / Iled so, for example, with a 12V supply, a
forward voltage of 1.2V, and 10 mA target current, you'd use a
((12 - 1.2)/.01) ohm resistor.

Doing the actual arithmetic, of course, is left as an exercise for
the reader. ;-)

Cheers!
Rich

 

[Ken Smith]

In article <43DFA734.A8D7015B@hotmail.com>,
Pooh Bear <rabbitsfriendsandrelations@hotmail.com> wrote:

placing them !

Graham

--
--
kensmith@rahul.net forging knowledge

 

[William at MyBlueRoom]

uuuuu!!! gosh thanks (I think)

Bill

 

[William at MyBlueRoom]

I appreciate all your feedback and suggestions on posting schematics. I
use B&W for the .png images and colour for the .pdf files.

Bill
Electronic PIC projects
www.myblueroom.com

 

[Ken]

Here is an LC meter that uses a comparator to produce the negative
resistance to keep an arbitrary LC tank oscillating.

http://my.integritynet.com.au/purdic/lc-meter-project.htm#circuit-osc

Looks good, thanks
here is a link with my circuit so far and my problem:
http://www3.sympatico.ca/lerameur/

 

[John Larkin]

On Fri, 3 Mar 2006 19:35:42 +0100, "Ken" <leram@hotmail.com> wrote:

Hi,

I am looking for a method to keep an oscillation going in a tank circuit (
inductor parallel to a capacitor). Therefore I would just like inject into
the circuit the power loss created by the natural resistance everyone so
cycle or a percentage of the peak value..
Yes I tried google and nothing comes close to what I m lookign for.

thanks
Ken

Google "lc oscillator"

John

 

[John Larkin]

On Fri, 3 Mar 2006 21:12:16 +0100, "Ken" <leram@hotmail.com> wrote:

Google "lc oscillator"

John

Liek I said, I tried Google= nothing
I am NOT lookign for theory on it. I want a schematic.

Ken

You must be using a different Google than the one I use.

John

 

[John Popelish]

Ken wrote:

Here is an LC meter that uses a comparator to produce the negative
resistance to keep an arbitrary LC tank oscillating.

http://my.integritynet.com.au/purdic/lc-meter-project.htm#circuit-osc


Looks good, thanks
here is a link with my circuit so far and my problem:
http://www3.sympatico.ca/lerameur/

As I understand your problem (correct my errors) you want to cause an
LC tank to oscillate. But you don't want it to be driven into
oscillation, continuously, but given a blast of energy only when the
oscillation has damped down to some minimum amplitude. I don't
understand if the blast is to be a single pulse, of a negative
resistance that feeds energy in, slowly, till the amplitude gets to a
second, larger amplitude. Then there is some other feature about
operating only when the supply voltage is larger than some value.

 

[Brian]

"Ken" <leram@hotmail.com> wrote in message
news:hs7Of.7236$RM2.748874@news20.bellglobal.com...

Here is an LC meter that uses a comparator to produce the negative
resistance to keep an arbitrary LC tank oscillating.

http://my.integritynet.com.au/purdic/lc-meter-project.htm#circuit-osc

Looks good, thanks
here is a link with my circuit so far and my problem:
http://www3.sympatico.ca/lerameur/

When VComp's output goes low, does that turn the simple switch off. If not,
that is your problem. Have you checked to make sure that VSen1 is turning
on, when capacitor C3 has the positive charge on it? If VSen1 does turn on,
does VComp turn off, when VSen1 turns on? The only thing that can discharge
C3, is the input of VSen1. If VSen1 has a CMOS input, that current could be
very small. Also, have you tried using another VSen1 device (in case the one
you are using is bad)?

Brian