MarkusB of Lets Make robots designed this simple Geiger counter. If you've somehow come across a Geiger counter tube and want to make a detector out of it, this could be just the thing you need. His design uses only commonly available parts, and is powered by a 5v power supply. He plans to make a radiation-seeking robot out of it, perhaps as an atomic version to Natalie Jeremijenko's feral robotic dogs?
This is all well and good, but how does the circuit work? Let's take a look:
Read more | Permalink | Comments | Read more articles in Electronics | Digg this!