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Volt stick circuits and tests

A look inside a generic Volt Stick clone. I had one of the first Sagab versions with what I think was a metal body, and I recall the circuitry as being similar to this. They work by amplifying capacitively coupled current with reference to ambient ground (through you). These units are a handy extra test option for checking if an insulated cable may be live without breaking the insulation. They are not infallible, so all usual safety precautions should be taken. As with all tools you have to understand how they work and things that can influence their operation. That includes high voltage equipment in the vicinity like neon signs or overhead lines. They should also be tested before each use on a known live cable. This video features three circuit variants that can be built with discrete transistors. While fun to build, it's more practical to buy one for work use, as a significant part of the unit is the case. If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- http://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty. #ElectronicsCreators