Electronic and others...

TL431 and LM431 are relatively low-noise, stable and low-cost shunt regulators. These can be used to build all sorts of power supplies inclu...

Circuit diagram of the light-sensitive fire alarm is shown in Fig. 1. It is built around L14F1 photo transistor (T1), BC547 transistor (T2) ...

Presented here is an LCD power-saving backlight-control circuit. An LCD is used in many projects for indication or information display since...

Last week Google introduced a radical new mail app, built on top of Gmail, that promises to cut through the pain of managing your inbox. Cou...

So…which domain name extension should you use? .COM, .NET, .ORG, .INFO or .US? The answer depends on your business model. If you want to le...

Here's how to build your own mini FM transmitter. It transmits FM waves so you could easily receive the signals on your mobile phone...

This is a low voltage 12V fluorescent inverter for powering two 20W or single 40W fluorescent tube. It's a circuit you can put together...

It's always handy to have a little amp kicking around to trace audio signals, test mics, CD tape and TV audio outputs. You know, so...

Curious C-Beeper is a fun to build little probe that can be used to quickly detect the capacity of capacitors in pF nF range, test their ...

With the maker faire this month I decided to make some bling to bring. Having made 80 of these necklaces in august that I brought with me t...