Arduino pwm fan control9/14/2023 ![]() ![]() If I shutdown my PC (and therefore power to the Arduino) and turn it back on will the Arduino just boot and continue to run its program? I ordered a dual ssd pcie bracket board and a 1-to-3 molex pcie bracket splitter to create a dual pcie slot fan controller. This way the PWM header can supply much more than 1A and switch between off and fixed RPM. A molex connector will serve as the power input, using the 5v for powering a relay controlled by the Arduino and the 12v connected to the PWM connectors. The PWM signal is set to a fixed RPM and the Arduino uses a temperature sensor in the waterloop to determine when a group of fans has to be switched on. ![]() I will be using an Arduino Uno in combination with the motherboard PWM signal. After concluding that my current motherboard doesn't really have the capabilities for my custom waterloop that I'm lookiing for, I decided I want to make my own controller.
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