A PIC16F676 microcontroller based fan speed controller unit which is capable of controlling three groups of 12V DC fans with using temperature feedback. You can set the threshold temperature for each ...
check the specs of the fan. there should be an voltage operating range. the minimum voltage in that range is probably the minimum voltage needed to get the fan to start spinning. if i recall correctly ...
The project illustrates the control of a PC fan speed and using an Arduino microcontroller to read a LM35 temperature sensor. The use of an optocoupler is covered along with Pulse Width Modulation ...
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