Soo, This is my first project that isn't just connecting a module to an Arduino... And I feel like I need some help understanding things and better ways of doing things.
The main objective is to create a PC fan controller for my watercooled PC, Needs to work for 60 seconds before the PC turns on and 3 minutes after it shuts down.
Well this circuit was my starting point: (Grabbed from here)
556 Timer IC
Capacitors: C1 = 680pF; C2 = 0.01 μF; C3 = 0.1 μF; C4 = 10 μF, polarized.
Resistors: R1 = 1k; R2 = 10K
Potentiometers: P1 = 100k
Diodes: D1 & D2 = 1N4148
But rather than using a normal potentiometer I would use a digi pot (Like this one) so that I can control the duty cycle via Arduino.
Does anyone see anything wrong with this? Would the output actually be 25kHz? Is there a better way of doing all this?
Thanks for any and all help!