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4 Wire PC Fan | ElectroSchematics.com
Circuit design
Pwn fan controller with temp sensing and button override
Electroschematics circuit schematic connector cooling speed electronics4 wire pc fan 12v pc fan 4 pin pwm header to 3 pin fan.
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![12V PC fan 4 pin PWM header to 3 pin fan](https://i2.wp.com/electro-dan.co.uk/pc/fan-4-pin-pwm-to-3-pin/PWMfancontrol.png)
![Smoke from Motherboard when plugging in fan header - CPUs, Motherboards](https://i2.wp.com/tweakers.net/ext/f/yDkNNE8vYYEr8JN7P9R0CGRk/full.png)
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