Unipolar Motor (28BYJ-48) Driver With Sequential Circuits

This

tutorial will show how to make a driver for the unipolar stepper motor 28BYJ-48 (5V) with the ULN2003APG driver circuit. The aim of this driver is to control the motor with 2 pins of an Arduino. These 2 pins will be the direction of rotation and clock frequency which will be handled with a digital pin and one of the 3 timers of the board.

The movement that will be used is in full steps because the aim is to implement it as wheels of a differential robot.

The materials used for this project are:

- 1 SN74LS76N Chip

- 2 HD74LS08P Chip

- 1 HD74LS02P Chip

- 1 Motor 28BYJ-48

- 1 Motor controller ULN-2003

- Arduino (To create the steps and direction)

- Protoboard

- Cable

The motor moves by changing the values on the 4 pins of the ULN2003 as shown in the figure.