The Aim of the project is to construct a system that allows the control of a cooling fan through the parrallel port of a Pc. This is to include a microphone to provide feedback about the true speed of the fan.
I would very grateful for anybodys ideas who could help in the circuit design.
well you could use the 8 output bits to control the speed but that means that you would have 255 speedes...lol, i dont think you need so many. maibe use onlly 4 bits. to get 31 speeds...i think it is enough.
but for the speed i suggest use a special sensot that either provides a voltege for a specific turation(a frequency to voltage convertor) or use a circuit that you should build
ya , i dont know where my mind was when i wrote that .....
acutually 15 speeds if you dont consider the state when it is off.
sorry about the confuzion garl....