Inside a 22mm digital panel indicator/voltmeter.
Science & Technologybigclivedotcom•51.2K Views
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Editorial Analysis
This is neat, and surprisingly cheap too. Instead of just being a panel indicator light it also displays the supply voltage. That's a very nice solution for quick diagnostics. The quality of construction seems OK. Very simple and well rated components for standard mains voltages, although the sense resistor may not be rated for the higher phase to phase voltages.\nPower dissipation is low at about half a watt with predictably poor power factor (0.07) because of the simple capacitive dropper and low circuit voltage. There's no significant heat being dissipated on the PCB.\n\nThe music track referenced is an old fairground classic called Dominator:-\nhttps://www.youtube.com/watch?v=-dohzrXT09w\nCarl Cox mix:-\nhttps://www.youtube.com/watch?v=iYvrXtmrLSY\n\nHere's a universal ebay search link for the meters:-\nhttps://www.ebay.com/sch/i.html?_from=R40&_sacat=0&LH_BIN=1&_nkw=22mm+voltmeter&_sop=15\n\nIf you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-\nhttp://www.bigclive.com/coffee.htm\nThis also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
