Geiger Counter

This DIY Geiger counter clicks and flashes an LED each time it detects a radioactive particle. It works with most common Geiger–Müller tubes, and easily connects to radiation rate meters, data loggers, true random number generators, and the Radiation Network’s GeigerGraph software. Share your radiation readings with the whole world! Read more »

Water Leak Detector

The average life expectancy of a hot water heater is about 10 years, so it’s not a question of if it will leak — it’s simply a matter of when. In my part of the country, homebuilders have been installing these tanks in the attic. This saves space, but also... Read more »

IC Wall Outlet Adapter

I like to build a lot of circuitry, but the voltage regulators that most IC’s require get annoying when you have to keep on buying them and putting them into each board you want to power. This is a very simple little device that will take the voltage coming from... Read more »