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GitHub - hamzab70/Raspberry-Pi-Fan-Script: Simple Bash script to control the fan speed using the Rapsberry Pi GPIO and a transistor.
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Raspberry Pi GPIO Cooling Fan Expansion Board with LED Compatible for Raspberry Pi 4B/3B+/3B - AliExpress Computer & Office
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GeeekPi 2PCS Raspberry Pi 4 PWM Controllable Fan, Raspberry Pi PWM Speed Adjustment Fan 40x40x10mm, Raspberry Pi Speed Control Fan DC 5V 4010 Quiet Fan for Raspberry Pi 4, 3 B+, Pi 3 (Black) | Pricepulse
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