In an earlier blog post I did a teardown analysis of the XL4015 DC-DC Buck Converter module. I recently received an improved version of the same module. I

Frequency to voltage converter is an electrical system that transforms the frequency of sinusoidal input into an equivalent current

The LM317 linear voltage regulator is the top pick for a variable DC power supply. See its pinouts, circuit calculator, and example circuits.

DIY Mini Lab Power Supply: A bench power supply is extremely useful for electronics hobbyists, but they can be expensive when purchased from the market. In this Instructable, I will show you, how to make a mini-lab power supply with a limited budget. It is a great DIY project…