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Welcome. I wanted to provide stripboard layouts I've made to help people new to electronics and even the more experienced get into different aspects of electronics.

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Wednesday, 5 February 2014

Linear PC Fan Speed Controller Stripboard Veroboard Layout

Extremely simple fan speed controller.

the input voltage depends on the fan you're using however the fan I used is a 12 volt fan so mine is powered by a 12 volt power supply.

I made this for a soldering iron fume extractor however it will work for your PC fans too and I plan on using it in mine.

here is a good video by fixitdaz on a very similar circuit


  1. will any npn work like the tip31????

    1. as long as it can handle the current of the fan used yeah