Fan not working - Jetson Nano 4g

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hello,
I bought a Fan-4020-PWM-5Vfor my jetson Nano.
I followed the recommendations of connection, the commands to launch. Without success.
(this one for example Fan not working)
When I run:

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

The jetson crashes and shuts down.

Whereas when I run:

echo 255 | sudo tee /sys/devices/pwm-fan/target_pwm

The fan reacts for a second and then the jetson turns off again…

The jetson is powered by a micro-usb cable.
And below is the output of the command sudo jetson_clocks --show

SOC family:tegra210  Machine:NVIDIA Jetson Nano Developer Kit
Online CPUs: 0-1
cpu0: Online=1 Governor=schedutil MinFreq=921600 MaxFreq=921600 CurrentFreq=921600 IdleStates: WFI=1 c7=1 
cpu1: Online=1 Governor=schedutil MinFreq=921600 MaxFreq=921600 CurrentFreq=921600 IdleStates: WFI=1 c7=1 
cpu2: Online=0 Governor=schedutil MinFreq=921600 MaxFreq=921600 CurrentFreq=921600 IdleStates: WFI=1 c7=1 
cpu3: Online=0 Governor=schedutil MinFreq=921600 MaxFreq=921600 CurrentFreq=921600 IdleStates: WFI=1 c7=1 
GPU MinFreq=76800000 MaxFreq=614400000 CurrentFreq=76800000
EMC MinFreq=204000000 MaxFreq=1600000000 CurrentFreq=1600000000 FreqOverride=0
Fan: PWM=0
NV Power Mode: 5W

I would be glad if you have any idea that could help me!

3

Hi,
Other users have confirmed Fan-4020-PWM-5V works, so it probably is due to insufficient current supply. Would suggest check if your power supply can offer 4A like this adapter:
https://www.amazon.com/Rapid-Charger-Adapter-Micro-USB-Supply/dp/B07G3F3HFF

4

Thanks for your reply.
We tried with this one Ohmeron Alimentation multi-tensions à découpage - 60W
Which worked on another jetson. Unfortunately, when we connect it to the jetson and place the jumper, it is not powered…
Do you have any other suggestions?

5

hello matthieu.francois1,

did you mean the fan device, or the Jetson Nano not powered?

6

Sorry, I meant the jetson is not powered

7

hello matthieu.francois1,

there’re several power-supply options you may try.
could you please check [Power Guide] session in Jetson Nano Developer Kit User Guide for reference, thanks

8

Thanks for the guide.
We actually followed this power guide for the connections (used barrel, and a Power select header pin on J48). It works well on another jetson. But not on ours. Should we send it back to the seller?

9

hello matthieu.francois1,

is this also a Nano DevKit, or it’s a customize board?

10

Hello, yes it is a Nano DevKit

11

Hi, if the power supply can work with another Jetson Nano developer kit but cannot work on the specific one, probably the developer kit is broken? Not sure if this helps but may re-flash the system image and try again. May also try 10W power mode.

13

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