Uploaded July 2026 | Updated September 2026, 1 week ago

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Building two more neon test screwdrivers with super bright high voltage LEDs. One can, besides AC, also indicate DC and its polarity and also test diodes. It uses about 280V peak voltage for the test, so unlike a multimeter diode test, it can test high voltage diodes and also reveal leakage currents at a high reverse voltage. The other tester uses 3 LEDs to be visible from all directions, eliminating the downside of the previous LED indicators.

The green tester episode:
youtu.be/vkBPdwa0ONg

The special HV LEDs come from this RGB + white LED lamp:
youtu.be/X4Zn0QI0pr8

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patreon.com/DiodeGoneWild