Tuesday, April 10, 2012

Radiation detector

Had a bunch of empty coffie cans that i wanted to use for something. I found this article about using coffiee cans for ion chamber radiation detectors.
I did not have the parts they suggested so i used whateve i had:

The detector turned out to be extremely sensitive and should be able to pick up small changes in the background radiation. I plan to make a solar powered version that will sit in the window and keep a watch on things.

Monday, April 9, 2012

Say hello to my little (old) friend..



A couple of years ago I built this prototype power supply for a large CO2 laser. The interesting thing about it is that it completely microcontroller driven and uses a rare series resonant topology. It deliveres up to 30KV and an adjustable constant current of up to 25mA.
After considering it lost I was pleased to find it again.
I was able to get it running and decided to show some fruits who is the boss...
video

As the picture from inside the power supply shows it is really simple consisting of only a few parts:

The power supply was originally inspired by this article