Tutorial 07 - DC Motor Demo (Free)

Tutorial 07 - DC Motor Demo (Free)

This program shows how to use L293D and PWM mode to control the DC motor.

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When program run, the DC motor will turn in clockwise and anti clockwise direction with speed up and speed down sequence. This tutorial will work with the Hi-Tech C compilers. 


PWM (Pulse-width modulation) Operations:

  • PWM Period = [(PR2) + 1] x 4 x Tosc x (TMR2 Prescale Value)
  • Pulse Width = (CCPRxL:CCPxCON) x Tosc x (TMR2 Prescale Value)
  • Duty Cycle Ratio = (CCPRxL:CCPxCON)/4(PR2 + 1)
  • Tosc = 1 / Fosc 

iBoard connection:



  • Tutorial 7 - DC Motor Demo: Video





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