Check the listing for details. Pocket Photodiode Geiger Counter. Condition: New. Listed at 26.95 USD. Pocket Photodiode Geiger Counter KitExperience Level: Intermediate 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. Required Tools:Soldering iron and solderAluminum foilElectrical tapeDrillStep drill bitHand toolsJumper wiring3 CR1620 coin-cell batteries, or any coin-cell batteries to add up to 9V2 pieces of 1/2" diameter x 2"L copper tubing available at Home DepotKit Includes: Part No. Qty. Description 11957 1 Aluminum Enclosure 15229 10 0.01uF Capacitor 23966 1 LM358N IC 597450 1 100uF Capacitor 178669 10 2N7000 Transistor 178597 10 2N3904 Transistor 234704 10 0.100" Housing Connector 234923 10 Crimp Connectors 38543 1 Battery Holder 333973 10 Red LED 108338 1 2-Pin Male Header 335557 1 Piezo Buzzer 72161 1 Toggle Switch 264990 1 Potentiometer Knob 15270 10 0.1uF Capacitor 255565 1 250k Potentiometer 332487 1 0.02uF Capacitor 691286 10 56k Resistor 691382 10 150k Resistor 691622 10 1.5M Resistor 691817 10 10M Resistor 1621132 1 PIN Photodiode 2157159 10 1k Resistor 51626 1 8-Pin IC Socket 105102 1 Prototyping Board 2156156 1 Fliptop Box Enclosure --- 1 Instructions Check out more fun and exciting electronic projects