I replaced the stock fan on the hat top with oled screen with a Noctua PWM and wired it as mentioned by other users. The fan runs and is able to stop but it’s spinning pretty slow and doesn’t spin faster when at 100% or 25% as set by default in config file. Is there something I need to change to get it to work properly?
Cheers
Is the fan voltage 5V?
Yes seems to be the 5v pwm version
Hi, did you resolve this?
I’m new to this, but I am thinking to replace the stock fan with Noctua too.
could you please link me the guidance to wire the PWM fan? I’m asking since my top board fan clearly utilizes a 3 pin which is associated with DC fans. Yes I know there is a PWM signal in the 10 pin connector with the HAT but, yet, I cant figure out why shoud I rewire PWM fan instead of buying a DC fan instead. It would be better if next revision of the bord had a 4 pin on the board.
If Noctua is running slower than expected there is good likelihood that the12 V Version is on PIs 5 V, because Noctua 12V and 5V looks quite same and therefore can be simply mixed up on ordering.
There is lot of posts on wiring e.g.
As here are no PC mainboard sockets used, 3 wire is capable for PWM (Voltage, GND and PWM), it is just the RPM wire missing.