Testing relays and their circuits in vehicles doesn’t always require a trip to the bench. With a few simple tools and ...

An uncomplicated circuit application of a ZD is the common shunt voltage regulator. If you have a Zener diode (ZD) of unknown characteristics or if you want to use reverse-biased transistor junctions ...

Sure, it won’t replace a $12,000 cable tester, but it doesn’t have to. Another simple circuit (if you don’t count the scope) that is useful for cable testing is a time domain reflectometer.

Why is that you always test 48 bulbs before you find the bad one in a 50-light string? This simple circuit allows you to divide and conquer, greatly ...