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softfan is a controller for fans hanging off of a parallel port, usually controlled by nice chubby power transistors. It expects to set pin 2 (data0) high to enable the fan, and low to disable the fan. softfan knows how to PWM the fan at 50% and 75% duty cycles over 10ms, as well as set the fan full off and full on.

The most recent version is 0.10. Get it here. It does not have a Makefile - just compile it as the simple C file that it is.

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output bandwidth