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BIPOLAR_STEPPER_MOTOR_DRIVE_CIRCUIT

2016-09-04 08:12  
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BIPOLAR_STEPPER_MOTOR_DRIVE_CIRCUIT
A 4017 decade counter/divider driven from a low-frequency oscillator (U1-a and U1-b) is used to drive transistor switches to sequence the windings, as is needed. MOT1 is a 12-V stepper motor. R9 and R10 are selected for the motor's current rating. A 3.3-Hz signal from UI will cause the motor to run at 1 rpm, a 33-Hz signal will result in 10 rum, etc.