Discover how to craft a simple electric motor using everyday household items in this detailed, step-by-step tutorial. Follow ...

Discover how to create a simple electric motor using everyday materials in this step-by-step tutorial. Learn how to build a ...

The worst thing about a volume knob is that, having connected it to a computer, it might be wrong: if you’ve manually altered the volume settings somewhere else, the knob’s reading won’t be correct.