Unipolar Stepper Motor Driver

Saturday, February 17th, 2018 - Motor Circuit

The circuit of unipolar stepper motor driver is used to control a stepper motor movement. With the circuit unipolar stepper motor driver this, movement stepper motors can be controlled by two (2) direction of regulating the logic high (1) or low (0) on the direction control input. In addition to the control input rotary direction, a circuit of ‘unipolar stepper motor driver’ also requires pulse stepper motor rotation control step on the path to the clock input, where the frequency of the control pulses determines the speed of stepper motor rotation.

The Circuit of Unipolar Stepper Motor Driver

Unipolar Stepper Motor Driver

The circuit of unipolar stepper motor driver over the use of the main components in the form of an XOR logic IC (74LS86) and a JK flip-flop IC (74LS76). The circuit with the second IC serves to generate four output pulse sequence that can turn the order by applying a certain logic in the circuit. The circuit requires a clock pulse to operate. Output stepper motor driver circuit is four (pin 15, 14, 11, 10 of the IC 74LS76). These pins will generate pulses that can drive unipolar stepper motors.

Output Unipolar Stepper Motor Driver

Output circuit unipolar stepper motor driver still requires power to drive the stepper motor driver with greater power. This is because the ability IC74LS76 in low current drain. To generate pulses with great currents can use the type of TIP31 NPN power transistors as a power stepper motor driver. With the addition of the power transistor circuits unipolar stepper motor driver can control the current up to 3A.

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