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Refugee · 1st May 2019, 10:43 pm

That circuit in post #17 would most likely work with a single MOSFET salvaged from an old computer power supply. Just connect the fan in the source where the base of the PNP is in that circuit.

1st May 2019, 10:43 pm	#18
Refugee Dekatron Join Date: Apr 2012 Location: Worksop, Nottinghamshire, UK. Posts: 5,553	Re: UPS in a wooden cupboard That circuit in post #17 would most likely work with a single MOSFET salvaged from an old computer power supply. Just connect the fan in the source where the base of the PNP is in that circuit.