Re: Rpi considerations

On 09/06/2024 22:33, Pancho wrote:

On 08/06/2024 22:22, Knute Johnson wrote:

I've got a Pi5 8GB with a Pimoroni NVME Base, a 250GB NVME SSD and a
RaspberryPi Active Cooler.  RPi has a M.2 HAT now that would work fine
too but I don't know if the Active Cooler will work with it.  The
active cooler is almost silent

It's not so much "almost silent", as totally silent. It is quite noisy
when it spins up, it just that, under Pi OS, it doesn't spin up unless
under extreme load.

and unless I do something really CPU intensive it never speeds up to a
speed where I can hear it (that could partially be because of 40 years
of jet engines too :-)

Look at it, the reason the fan looks stationary, is because it is
stationary. It's not a strobe effect. Stick something in it, if you
don't believe me.

Or issue this command:-

cat /sys/devices/platform/cooling_fan/hwmon/hwmon2/fan1_input

Which will give you the current fan speed rpm. If you want know how fast
as a percentage it is read
/sys/devices/platform/cooling_fan/hwmon/hwmon2/pwm1 and divide by 2.5

---druck