We spent eight months talking with electricians and testing seven models to find the best and safest non-contact voltage testers. Here’s what we discovered.

The tester features a pair of powerpole connectors, which are used quite often for connecting HAM gear. A PIC12F675 runs the show, acting as an adjustable comparator for detecting voltage levels.

This Simple Voltage and Current tester can be used to measure the forward Voltage drop and current through Semiconductor Diodes like LED, Infrared diode, Photo diodes, Silicon diodes etc. This is ...

To test passive components, the tester places a test voltage across the component under test and measures the current. For resistors, this is a DC voltage; for capacitors and inductors, it’s an AC ...