Automatic Pet Feeder

I am going to teach you how to properly set up an Arduino for this configuration and explain some basic programming. I am also going to explain to people how to build the system in a few simple steps. Read more »

Pop-Pop Steamboat

When you picture a steam engine, you likely imagine a giant cast-iron contraption festooned with knobs, valves, gauges, linkages, and wheels. This steam-powered toy boat has no moving parts and needs only a flame and the surrounding water to zip around and make its distinctively happy sound. My interest in... Read more »

Magnetic iPad Holster

When I got my new iPad, I immediately came up against a few problems. I don’t have a lot of horizontal space in my office because my desk is always cluttered. I also needed a safe place to leave the iPad while I charged it. Leaving this expensive piece of... Read more »

Make: Compressed Air Rockets Kit

Building this rocket launcher is a breeze, and folks are always amazed at how it shoots reusable paper rockets 200–300 feet high. The launcher is made from PVC pipe. You pressurize its chamber to 75psi with about 18 strokes of a bicycle pump, then release all the pressure in a... Read more »