Month: August 2007

HOW TO – Make an H-bridge

HOW TO – Make an H-bridge

Randofo writes – An H-bridge is a type of circuit that you can use to get a reversible DC motor to spin both clockwise and counterclockwise. In other words, this circuit allows you to quickly reverse the direction a motor is spinning by using a switch or controller chip to change its direction. I’m going […]

Building an embedded Asterisk PBX

Building an embedded Asterisk PBX

David writes in with his latest open source telephony project – The IP04 is an IP-PBX that runs Asterisk on a Blackfin processor in a tiny embedded form factor. It has been designed by an international team of telephony/DSP hackers using the “open hardware” philosophy. The IP04 has now gone into production – one of […]