General Electronics

Capacitor/Condenser Microphones

Didn't some old capacitor/condenser microphones use RF oscillation? I seem to vaguely recall such schemes, but my surfi...

45 comments posted 21yrs

posted by thegreatone

45 comments posted 21yrs posted by thegreatone

thermal conductive glue ?

I've seen those heatsinks which stick on ram sticks with double sided conductive tape, but has anyone seen this stuff a...

3 comments posted 21yrs

posted by exxos

3 comments posted 21yrs posted by exxos

Question: Building a Bi-Polar AC adapter

I'm about to build a bi polar power supply to power some electronic effects for electric guitar that I've built that I'...

2 comments posted 21yrs

posted by rufustf

2 comments posted 21yrs posted by rufustf

HELP!! Motorola or Systron Donner Part

I'm looking for a custom IC marked 528 55178 it's used in a motorola S1344AAB Frequency Counter/Auto Tune Deviation Met...

1 comments posted 21yrs

posted by willco788

1 comments posted 21yrs posted by willco788

AM modulator

Hi all, Im trying ot build a very simple AM modulator with a small op-amp, bascially the carrier is fed into the amp in...

5 comments posted 21yrs

posted by exxos

5 comments posted 21yrs posted by exxos

Canadian suppliers of short-run PCBs?

Are there any suppliers of short-run (approx. 50 boards) PCBs?. The board that I require will be approx 3x3in, with hole...

4 comments posted 21yrs

posted by ksleep

4 comments posted 21yrs posted by ksleep

IEC Graphical Symbols for Electronics

Does anyone know where I would be able to get IEC Graphical symbols for electronics? IEC wants a few hundred bucks, but...

1 comments posted 21yrs

posted by devodragon29

1 comments posted 21yrs posted by devodragon29

Fox News Reports Arafat Dead

Fox News Reports Arafat Dead Let us hope that his successor is peace-thinking. ...Jim Thompson -- | James E.Thompson, P...

31 comments posted 21yrs

posted by thegreatone

31 comments posted 21yrs posted by thegreatone

Anyone want soem Lithium cells?

Two remaining Lithium AAA cells are still in the package and since I wont be needing them (do not have a digital camera...

5 comments posted 21yrs

posted by crucifyself03

5 comments posted 21yrs posted by crucifyself03

1-wire waveforms and details

There is a multitude of stuff on the Dallas website on this but I can't find any waveform diagrams which include basic...

4 comments posted 21yrs

posted by Fred

4 comments posted 21yrs posted by Fred

Matrix Converters

I've just started to learn about matrix converters as part of my university course, and I've been asked to decide which...

0 comments posted 21yrs

posted by p.r.bradbrook

0 comments posted 21yrs posted by p.r.bradbrook

HDD -Motor ---> LEDs

I pulled a spindle motor out of an old HDD, and it has four gold plated spots on a piece of flexible PC Bd glued to the...

6 comments posted 21yrs

posted by NOSPAM

6 comments posted 21yrs posted by NOSPAM

Battery question

I hear that in Japan there is a Lithium Ion battery that does not discharge (at least it takes many years). How is this...

3 comments posted 21yrs

posted by crucifyself03

3 comments posted 21yrs posted by crucifyself03

DVD R/W

I am with problem in the installation of a new DVD recorder (LG). If somebody can to help me, I thank. I installed DVD...

2 comments posted 21yrs

posted by carvalho

2 comments posted 21yrs posted by carvalho

newbie question on variable transformer

hi, im currently doing research on fuses. my research basically involve of single phase variable transformer and it is...

5 comments posted 21yrs

posted by lazy_daisy79

5 comments posted 21yrs posted by lazy_daisy79