Fan controll - Raspberry Pi Forums

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hi, im working on fan controller (controlled raspberry pi), have found out shall controll using n-fet transistor can controll how current shall flow trough (how fast fan shall go) not turn on , off, raspberry pi can not directly output analog voltage transistor, use ic called dac8311 (http://circuits.datasheetdir.com/194/dac8311-pinout.jpg) dont know how wire raspberry pi.
help?
ps: im gonna use 5v external source

that chip going rather difficult use pi. here complete instructions using different chip https://learn.adafruit.com/mcp4725-12-b ... i/overview.


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