How Does A Contact Voltage Tester Work

In this video I am going to talk about an electrical tester that is capable of replacing many of the testers we all use on a regular. Homemade non contact voltage tester Wireless AC line detector using BC547 Simple AC detector This is a wireless AC line.

Non Contact Voltage Pen Tester Teardown. Demonstrating the difference between Schottky diodes and PN junction silicon diodes and how your multimeter can influence.

Video ini menerangkan cara penggunaan test pen yang betul dan selamat untuk memeriksa arus elektrik di rumah.