General Electronics

Back to the IR light source concept...

This message crossed over into RPEM as an "in case anybody is interested in my progress" update. Primarily aimed at the...

22 comments posted 22yrs

posted by dakidd

22 comments posted 22yrs posted by dakidd

13.2V Ni-Mh smart battery charger

Hi all, I am looking for schematics of a smart Ni-Mh battery charger. it should be able to normal or fast charge this b...

0 comments posted 22yrs

posted by yalonbh

0 comments posted 22yrs posted by yalonbh

help with Rotary Phone

Hi, hoping someone can help me out here. I have a rotary phone from the 70s or 80s, and it doesn't seem to work with ds...

1 comments posted 22yrs

posted by kurtolios

1 comments posted 22yrs posted by kurtolios

Re: Using a single resistor with several LEDs

>When using an LED from a power source whose voltage is higher than the >rating of the LED, a resistor is typically use...

2 comments posted 22yrs

posted by byron

2 comments posted 22yrs posted by byron

Dual trace on single trace oscilloscope?

Sometime in the dim and distant past I remember seeing a DIY circuit that would allow two channels to be displayed, pre...

4 comments posted 22yrs

posted by ham.g0wll

4 comments posted 22yrs posted by ham.g0wll

An affordable USB development tool

The Tracker 110 is a USB bus analyser which can record low-speed (1.5Mbps), full-speed (12Mbps) and mixed transactions....

0 comments posted 22yrs

posted by sales

0 comments posted 22yrs posted by sales

Overstocked components SALE %%%%%

Hello everybody! See our inventory : http://www.dgtronik.com.pl/sprzedaz.php?lang=en and press CLEARANCE SELL Many comp...

0 comments posted 22yrs

posted by szostek

0 comments posted 22yrs posted by szostek

heatsink paste

Hi all, I have small heatsink problem where I need to "fill" a small gap with something heat conductive, I could fill t...

3 comments posted 22yrs

posted by exxos

3 comments posted 22yrs posted by exxos

Low-priced Gerber editing tools?

I've never seen any. Just wondered if they exist. Of course I know about some of the excellent free viewers available,...

0 comments posted 22yrs

posted by sporkedUNDERLINEagainMUNGE

0 comments posted 22yrs posted by sporkedUNDERLINEagainMUNGE

AM Demodulation Using an MC1496 4-Quadrant Multiplier

Per a request to post a "real" circuit rather than a behavioral one, I have added "AM-Demodulator-MC1496.pdf" to the S....

0 comments posted 22yrs

posted by thegreatone

0 comments posted 22yrs posted by thegreatone

Always -On Calculators

Does anyone know of a handheld calculator (compact) these days that stays always on? Is there a way of tweaking calcula...

2 comments posted 22yrs

posted by locato

2 comments posted 22yrs posted by locato

voice pitch control

Hi all, Does anyone know where I can buy a MSM6722 made by oki, Even E-mailing Oki wasn't that helpfull :( Thanks, Chris

0 comments posted 22yrs

posted by exxos

0 comments posted 22yrs posted by exxos

Cheap FM transciever mod?

I recently purchased a cheap FM transceiver for a project I'm working on. I'm Tylerunhappy with the performance on the...

1 comments posted 22yrs

posted by fark

1 comments posted 22yrs posted by fark

FS: lots of parts & manuals for pro audio/video/test equipment

Follow the link below, then click on the appropriate category. Thanks! http://stores.ebay.com/advancedmedia

0 comments posted 22yrs

posted by glarsonjr

0 comments posted 22yrs posted by glarsonjr

Strange noise from alarm clock

We recently replaced an alarm clock because it would throughout the day make this noise (dah duh -- dah duh -- -- dah d...

8 comments posted 22yrs

posted by edavid3001

8 comments posted 22yrs posted by edavid3001