jetson fan control sticky

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

this sends voltage to the fan header

sudo sh -c 'echo 255 > /sys/devices/pwm-fan/target_pwm'

and i can see the fan tries to start-the blades twitch a little. I have to manually spin the fan to get it to start.

if I stop the fan with

sudo sh -c 'echo 0 > /sys/devices/pwm-fan/target_pwm'

and then try to restart it, the same sticky behavior occurs.

This is with the recommended noctua NF-A4x20 directly attached to the header with nothing in between (no resistor, splitter, etc)

2

Not sure, but I think there are two models, one is 12V and the other one is 5V. You would use the latter one for Nano.

3

That is correct HP, since the Nano supplies 5V on the fan header, you would ideally want to use the NF-A4x20 5V PWM version.

Some users have reported that their 12V fans have been working with Nano (at a lower RPM), but you may see some weirdness like this with 12V fan.