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发表于 2023-08-02 22:38:18
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Edited by albertr at 2023-08-03 00:42
I replaced the bottom fan with Noctua NF-A4x10 5V PWM fan last week and I'm happy to report that it indeed solved the EMI issue.
The pinout of Noctua fan is the same as pinout of the fan that beelink is using, but it's different connector, so some minor soldering is required:
GND
+5VDC
tach output from the fan
PWM input to the fan
The Noctua NF-A4x10 fan is square-shaped and 10 mm thick, so you will not be able to bolt it down to the plastic plate. I just cut the square-shaped opening in the plastic plate and glued the fan to it. I used the same airflow direction as with the original fan, but it can be easily reversed if needed.
The PWM coming from the board is constant 50% duty cycle, so fan is running at half the speed. If you don't connect the PWM line, then Noctua NF-A4x10 fan will run at twice the speed instead (100% duty cycle).
Tach output can be left disconnected too, and I didn't find any way to monitor the fan speed via software. So in a nutshell all you need to wire up is just GND and +5VDC lines, and that also means that you can use any 5VDC fan.
-albertr |
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