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Other macros are used to define user related options. In the first line we defined crystal frequency which is needed for the delay routine. #define _XTAL_FREQ 200000000 //Crystal Frequency, used in delay #define speed 1 // Speed Range 10 to 1 10 = lowest, 1 = highest #define steps 250 // how much step it will take #define clockwise 0 // clockwise direction macro #define anti_clockwise 1 // anti clockwise direction macro These are the macros for configuration bits of the microcontroller unit and the library header files. As always first, we need to set the configuration bits in the pic microcontroller and then start with void main function. #City car driving 1.4.1 serial product code code#If you are new to PIC Microcontroller than follow our PIC Microcontroller Tutorials stating with Getting started with PIC Microcontroller.įull code for this PIC based Stepper Motor Driver is given at the end of this tutorial with a Demonstration Video. I connected all the components and your hardware to rotate Stepper motor with PIC microcontroller is ready. The Connection from Breakout board to the microcontroller unit will be. The ULN2003 and the Stepper motor part is inside the breakout board. In the circuit diagram, on the left side the PIC16F877A is showing and on the right side the ULN2003A connection is showing. 5V power supply unit or wall adapter with 500mA rating.ULN2003A breakout board along with the 28BYJ-48 Stepper motor. ![]() Check the demonstration Video at the end. #City car driving 1.4.1 serial product code full#We will rotate the motor in full drive mode in clock wise direction and again rotate it with wave drive mode in anti-clockwise direction. The pink input is for the microcontroller connection. The yellow portion is used to connect the motor, The Red portion is showing a jumper, It’s important to place the jumper as it will enable freewheeling diode protection for the motor. It’s important to understand the pin out. Let’s understand the break out board which consist ULN2003 IC. #City car driving 1.4.1 serial product code driver#Stepper motor can also be controlled without any Microcontroller, see this Stepper Motor Driver Circuit.
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