A DIY geiger counter that uses a PIN photodiode as a substitute for an expensive Geiger-Mueller tube. It detects alpha and beta radiation particles. The circuit is soldered onto a small protoboard and everything is placed in an aluminum enclosure. Copper tubing and a piece of aluminum foil is used to help filter out noise and RF interference. Be sure to check out what others are saying about the Pocket Photodiode Geiger Counter project build!
Soldering iron and solder
Step drill bit
3 CR1620 coin-cell batteries, or any coin-cell batteries to add up to 9V
2 pieces of 1/2" diameter x 2"L copper tubing available at Home Depot