Popsicle Stick Switch

A momentary contact Single Pole Single Throw (S.P.S.T.) switch that is based on a Popsicle Stick. It is easy to build and the builder learns how a switch works. Read more »

Sun Logger

A data logger is a device that is left to run for long periods of time, making regular measurements of external sensors. We’ll be using the Arduino microcontroller and a homemade “shield” (an Arduino accessory board) to create a device that gathers data on light-brightness in an area and how... Read more »

Solar Spinners for Your Windowsill!

This is an easy-to-build simple solar engine, also known as a Trimmet. We will construct a direct-drive type (as opposed to a voltage-triggered) spinner that will really go nowhere fast in direct sunlight. Perfect for windowsills and desktops that get a lot of old Sol’s rays. Many different styles are... Read more »

Arduino LED Fuel Gauge

Arduino Fuel Gauge: A few months ago, I hit a pot-hole while driving my 1974 Dodge Dart and my fuel gauge immediately went to “E.” For a split second I thought I lost all of my fuel! My father-in-law suggested I drive backwards over the pothole to fix the gauge.... Read more »