I think I don’t have to explain what is H-Bridge circuit. Well it is mainly used to drive DC motors that they could be run forward and backwards. Circuit often used in robotics.
Usually there is a need to build small powerful and with good characteristics H-Bridge. One solution is to use IRF7105 p and n [...]

I found this circuit really simple and interesting. It is really simple to drive Nokia 3310 graphical LCD by using simple LPT cable and some PC software. Firs of all connect graphical LCD to LPT port according to following circuit:

Graphical display needs about 3.3V of supply voltage, while LPT gives about 4.5 -5V. This is [...]

This circuit is so simple and generated sound may look ugly, but from other hand this is good starting point for newbies with AVR projects. This circuit is made of one IC AT90S2313 (may be substituted by Attiny2313). Circuit is low power and reliable as it consists of very few parts (if SMD chip used, [...]

I found this wind direction measurement circuit simple and interesting. If you are doing some home automation project, this might be another sensor that can be included in you project.
For Wind direction measurement you will need a circle from some material (you might even use CD disc.) Then stick an arrow on top. One end [...]

Sometimes you just need to program I2C EEPROM chips and don want to invest any bucks to it, then you should consider I2C EPROM programmer from http://www.lancos.com site originally designed by Claudio Lanconelli. This is very easy to build and use circuit but it supports 24C01, 24C02, 24C04, 24C08, 24C16 24C32, 24C64, 24C65, 24C128, 24C256, [...]