The Solar Bottle Lamp is a solar-powered light that reuses a waste plastic bottle by attaching a 3D-printed solar lamp in place of the old plastic cap.
Backyard Wind Power
Convert Any Bike to Electric with an Easy Front Wheel Motor Kit
Sunlight may be free, but transforming it into usable electricity is not. Build some small-scale solar power by transforming a 25-watt semi-flexible panel into a practical battery charger.
Transform a 25-Watt Semi-Flexible Panel into a Practical Battery Charger
Generate Electricity from Bacteria in Mud
Air conditioning is simpler than you'd think. Build a simple battery-powered portable cooler to stay fresh in the summer.
Keep Cool Anywhere with a Battery-Powered Air Conditioner
Crush Cans Effortlessly with an Arduino-Powered Arm
An IV Swinger can be used to track the efficiency of solar panels. Learn how one maker made his own.
Collect Solar Panel Data with an IV Swinger Curve Tracer
Measure Sunlight with a DIY Solar Radiometer
You'd think there'd be something like a dual set point thermostat on the market already, but it doesn't look like there is. Guess you'll just have to make one.
Build a Dual Thermostat for Precise Preset Temperatures
Build this mint tin backpacking stove that can boil 1-2 cups of water and is made with commonly available parts.
DIY Mint Tin Backpacking Stove
Build the Perfect Backyard Wood-Fired Pizza Oven
Build a Delay Timer that Doesn’t Suck (Energy)
Make a High Voltage Plasma Arc Speaker
In this project, I am going to show you how to make a tripod mount for your small solar panels.
Make a Solar Panel Tripod Mount
Make a simple tin-can stove that costs 99 cents, runs for free, and sequesters carbon as you cook.
Wood Gas Camp Stove
Whether it’s the “Fukushima plume” or giant monsters on your mind, the classic Civil Defense CDV-715 Geiger counter has a perfect retro-style case to house a modern, sensitive digital Geiger counter. Replace its guts and add a new ana...
Godzilla Detector: A Retro Digital Geiger Counter