Ever since my consultant days, I have believed that you should not scrimp when it comes to test equipment. Accordingly, when it came time to buy a DVM (digital voltmeter) I spent over $400 on a ...

A lithium-ion battery tester seems like a simple project, at least electrically. But when you start thinking about the physical problem of dealing with a huge range of battery sizes, things get a ...

Isn’t it always the way? There’s a circuit right out of the textbooks, or even a chip designed to do exactly what you want — almost exactly. It’s 80% perfect for your application, and rather than ...