Monthly Archives: December 2012

$2.50 eBay fan controller / Zalman Fanmate schematic

So I wanted to adjust a fan down to 3.3 volt, the fan controller only allows 5-12V. Replacement of R6 was needed: To understand this circuit, know that any voltage higher than 2.500 volt on the Ref-pin of the Tl431 … Continue reading

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