Hi there
Is there an easy way to change the fan speed on the fanshim?
Instead of having it running at 100% for 10 seconds, I’d rather have it running at 50% for 30 seconds, in order to get back the temperature under the defined threshold.
Thanks
Luca
Not that I an aware of, I have several on the go here.
You could maybe PWM the fan control pin. I don’t think it will do any harm, but do so at your own risk.
too bad :( thanks
and I need to write useless stuff to meet the minimum length requirement…
For future reference, I tested PWM with my old Fan Shim, and it doesn’t work. :(
I have a working fan set up with a transistor/diode/resistor setup as shown here - PWM Regulated Fan Based on CPU Temperature for Raspberry Pi : 4 Steps (with Pictures) - Instructables - to verify the PWM method is working correctly on Pin 12 / GPIO 18.
If I switch on this pin manually, the Fan Shim works as expected.
However, if I run PWM on it using the method that works with my other fan, it doesn’t run the fan properly. Initially, the Fan Shim will twitch, but no continuous motion. I’ve tried a range of duty cycles and frequencies.
It’s a shame it doesn’t work, even if for whatever reason they decided it shouldn’t be supported (eg. fan aging)