Schematic overview
EC motor | 10 Kohm potentiometer | variable fan speed control
Solution description
The EC fan speed can be manually adjusted via the 10 Kohm potentiometer. The potentiometer controls the EC fan speed from low to high. There is no OFF position. The potentiometer has a resistance value of 0 - 10 Kohm. If the supply voltage is 10 VDC, it will generate a control signal of 0-10 VDC. Minimum and maximum speed can be adjusted via trimmers on the potentiometer.
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