![circuit design - 4-wire fan controlled by potentiometer and 555 IC not behaving properly - Electrical Engineering Stack Exchange circuit design - 4-wire fan controlled by potentiometer and 555 IC not behaving properly - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/8UuSg.png)
circuit design - 4-wire fan controlled by potentiometer and 555 IC not behaving properly - Electrical Engineering Stack Exchange
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Amazon.com: Taidacent 2510-4P 3P Manual 4 Wires 0-5V 12V Fan Speed Controller PWM Speed Control On Off Switch for PC CPU Case Fan with Knob (Solder Connector with Plastic Black Knob) :
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Fan HUB Spacer pentru maxim 5 ventilatoare ARGB, telecomanda setat iluminarea RGB, alimentare 4-pin - eMAG.ro
![Project] Arduino-based fan controller (4 fans) with support for automatic/manual control and speed display : r/hardware Project] Arduino-based fan controller (4 fans) with support for automatic/manual control and speed display : r/hardware](http://i.imgur.com/MiOdZEQ.jpg)