If you feed 5V to your mosfets ( for example taken from one of the endstop connectors ), they'll output 5V when turned on. Make sure you protect your mosfet when plugging a fan into it ( see documentation ).
Andrew Wade
Discussion -Is it possible to drive 5vdc fans from the smoothie board, i have added a 1A voltage regulator? I would rather not use a separate supply, can i use the supply on the board? It would be control two 5vdc fans at 0.36W each. I also have a glcd display powered by the board
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Any reason you can't use alternate fans? I got some small 24v fans from eBay for $3 and drive one of them off the main supply for cheap air assist
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DCDC-Stepdown converter for 0,50€ should do it.
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