Diff. B/w PWM and DIR of motor shield board

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,
I want to know the difference between pwm and direction pin of motor driver board. I want to connect 10amp motor driver board with atmega 8a 32pin. Atmega 8a has 3 pins for PWM.

2

PWM sets the speed. The direction pin sets the polarity of the motor output and is usually connected to a digital output.

3

Thanks. But there is only 1 direction pin in motor driver board. Motor can rotate in 2 directions. How only 1 pin manage this ?

4

Don't you have any documentation for the motor driver board? Generally, you set the direction pin low for one direction and high for the other.

5

Yes I have the datasheet. It says:-

GND – connect to GND on controlling board
DIR – Pulled down to GND Forward by default and Backward when 5V (logic high)
PWM – Pulse Widht Modulation input to control speed of motor (recommended freq 20Hz to
400Hz)
BRK – breaking input to halt the motor in operations when 5V (logic high)
5V – regulated 5V output from motor driver board (maximum 50mA supply)

6

How I can set the Direction of motor with Values HIGH and LOW in C programming ? :frowning:

7

Try working through some examples on the tutorial pages.