JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

2026-09-05T22:26:40Z

Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

Neue Seite

__NOINDEX__
'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

== Summary ==
The Waveshare Fan-4020-PWM-5V is a dedicated cooling fan designed to cool the Jetson Nano. It connects to the developer kit's PWM interface and its speed can be adjusted via a system file.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL16681 WSAL16681 – Dedicated Cooling Fan for Jetson Nano, PWM Adjustment]

== Technical overview ==
* The fan is designed for the Jetson Nano and supports PWM-based speed control.
* Connection: plug the fan into the Fan connector on the Jetson Nano Developer Kit, paying attention to polarity.
* The four wires have distinct roles: black = GND, red = Vcc, blue = tachometer signal, yellow = PWM.
* Operating current is 0.27 A at 7500 rpm.
* Wire colors for tach and PWM may vary between production batches; actual product wiring takes precedence.
* Fan speed is set by writing a value from 0 to 255 into /sys/devices/pwm-fan/target_pwm.
* /etc/rc.local can be used to start the fan automatically at boot.
* nano can be installed as an alternative editor to vi for editing rc.local.

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo sh -c 'echo 255 > /sys/devices/pwm-fan/target_pwm'
sudo vi /etc/rc.local
sudo chmod u+x rc.local
sudo reboot
sudo apt-get install nano
sudo nano /etc/rc.local
</syntaxhighlight>

== Notes and version constraints ==
* Tach and PWM wire colors can differ across batches; verify against the physical unit before connecting.
* The path /sys/devices/pwm-fan/target_pwm assumes the kernel module for the PWM fan is loaded; otherwise the file will not exist.
* rc.local must be made executable (chmod u+x) and exit cleanly (exit 0), or it may not run reliably.
* The 0.27 A and 7500 rpm figures come from supplier material; consult the datasheet for other variants or revisions.
* No warranty, certification, or safety-standard information was present in the source document.

== Source and revision record ==
* [https://www.waveshare.com/wiki/Fan-4020-PWM-5V Fan-4020-PWM-5V - Waveshare Wiki]
* Source revision: 87154
* Captured: 2026-08-31T03:47:12+00:00
* SHA-256: <code>48a8df6e02381df057f47e5ad8ef1c7b4518589b1403668979d455c640e58014</code>

WSAL16681 – Fan-4020-PWM-5V/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex