It’s a project called snapVCC, and it turns a 9 volt battery into a regulated 3.3 or 5 volt supply. The idea behind snapVCC is simple enough; just add a circuit board to the top of a nine volt ...
A 9-volt battery is an ideal battery for magnetising a small screwdriver. It's small and easy to move around; you can even tape the battery to the handle of the screwdriver. Importantly, no other ...
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