Portable battery-powered adjustable power supply
thingiverse
This is pocket power-bank with adjustable buck-boost converter.Uses XY-SK80 CNC Buck boost power modulehttps://aliexpress.ru/item/1005005133709806.html4S power bank boardhttps://aliexpress.ru/item/1005005269642447.html4*18650 cells with holder, 2 power terminals and switch.Very useful thing, for test, repair, diagnosis electronics outdoor, output 0.6-36V up to 5A, constant voltage-constant current modes. And also can work as power bank with USB PD.M4 screw used to attach any safety ropes, when it uses on roofs or highs.
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