Stepper motor driver circuit diagram and explanation the figure shows the circuit diagram of two stage stepper motor driver now as shown in the circuit diagram the 555 circuit here is to generate clock or the square wave the frequency of clock generation in this case cannot be kept constant so we need to get variable speed for the stepper motor. This process continues and depending on the frequency of the clock signal the speed of rotation of the stepper motor varies advantages a diy type stepper motor driver is designed here that can drive unipolar stepper motors by using this stepper motor driver we can avoid costly dedicated stepper motor driver boards disadvantages. Arduino stepper motor control circuit diagram and explanation the circuit diagram for the arduino stepper motor control project is shown above we have used the 28byj 48 stepper motor and the uln2003 driver module to energise the four coils of the stepper motor we are using the digital pins 8910 and 11. A simple electronic circuit is built in to drive coil 1 which imparts pendulum to move to and fro and the other coil 2 generates 300 mv due to magnetic flux i would like to drive the bi polar stepper motor only already provided in the quartz clock with a suitable circuit with only the input ie 300mv pulse
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