Subscribe to Make Magazine Today!

Android Geiger Counter


Use the camera in your Android smartphone to detect radiation with the Radioactivity Counter app from Rolf-Dieter Klein. Just place a small piece of black tape over the camera lens, calibrate for ambient noise, and you’ll be ready to take readings in no time. The app uses the device’s built-in... Read more »

iPhone Cord-On-Board Case

Image (2) ST-10.jpg for post 123043

Don't you just hate it when your smartphone runs out of juice? If you're like me, you're probably not far from an open USB port, so you're set if you're the type that always carries around a spare cord. But that rarely happens, right? Not if makers Lucky, Nate, and... Read more »

Mobile Charging Choices

This year's hurricanes, earthquakes, and tornadoes definitely inspired me to dust off the emergency gear in my basement, such as the battery-powered lanterns, the shortwave radio, the first aid kit, the dynamo flashlight, and the like. It also made me realize, after going several days without power, my online lifeline... Read more »


Get every new post delivered to your Inbox.

Join 28,830 other followers