Specific module for 28-BYJ48 steppers, on the board, in addition to the ULN2003A chip we find 4 LED diodes with relative limitation resistors, the LEDs A, B, C, D indicate the status of the stepper motor operation.
The control signals coming from the control board are supplied to the pintrip J1, the motor is connected to the 5-pin Pinstrip J4.
The pin strip J3 is used for power supply, if you conn...
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