It’s been a while since I made a post here as I’ve been a little busy working on my new venture http://www.expertinternetsecurity.com/ but I’m going to try and get back to it again. I’ve been messing around with some cool projects from the Pololu robot, to wireless power, to a wireless network exploit station built around the raspberry pi.
Anyway, some time ago, I became interested in wireless power. I don’t know a huge amount about electronic theory, but thought I’d give it a go. The circuit is really simple and really really REALLY inefficient. I use a signal generator to drive a high power transistor at about 10kHz square wave and then have 24VDC pulsed through the coil. The receiver is just a coil with a noisy weak AC current and some LEDs. I can increase efficiency slightly using a capacitor.
Of course, there are some far better circuits out there like http://iteadstudio.com/application-note/wireless-power-transmission-or-charge-module/ or http://www.youtube.com/watch?v=2ODW-ntPHSU but this was just a quick hacked together test without going too much into the electronic theory of it. Here’s some pics..