I would like some help in putting together a circuit for controlling fans through pwm. Does the attached circuit makes sense? I have added the npn amplifier and mosfet as the pic (16f628a) is not capable of driving the fans (2x12V) directly. I should probably also isolate the CCP1 pin using an optocoupler.
This is first itteration, once this is working, the next step would be to add temperature sensing (Dallas DS18B20). For those interested, the aim is to produce an "automagical" way of controlling fans used to cool the primary mirror of a newtonian telescope.
Thanks for your help
This is first itteration, once this is working, the next step would be to add temperature sensing (Dallas DS18B20). For those interested, the aim is to produce an "automagical" way of controlling fans used to cool the primary mirror of a newtonian telescope.
Thanks for your help