In a world filled with high-tech robotics kits and programmable gadgets, one artist decided ...

No advanced motor modules. No complex control boards. Just magnets, copper wire, a transistor, and a 9-volt battery. Here is ...

Since I’m starting to use more 9V rechargeable batteries, I thought it would be a good idea to build a simple 9V rechargeable battery for my friendly guitarist instead of having to urge him to look ...