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DC motor servo control circuit

2015-02-28 15:57  
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DC motor servo control circuit
In the circuit, E, O points are input DC voltage, then the motor will be moved to a position corresponding to a given voltage. The potentiometer coaxially connected to motor is used as position feedback. When a given voltage and 1k potentiometer wiper contact voltage are equal, the differential amplifier output is zero, so the motor is stationary; Otherwise, the motor will be transferred or reversal according to the size of the signal.