![]() Int count //count gets incremented for every timer overlap Int cycle_time //= 150 //On-Time for the PWM signal ![]() So let us prepare circuit diagram to Interfacing Servo Motor with PIC Microcontroller using MPLAB and XC8. Here potentiometer will vary the cycle time of signal with the help of ADC module.Īs I explain in previous tutorial to getting start with PIC controller programming we need install MPLAB X IDE softwareand XC8 compiler on our system.Īlso we need Proteus simulator to simulate the circuit with program. We have already seen in our previous tutorials Timer0 is very well capable to generate delay up 20ms, so let user Timer0 with interrupt to create PWM signal from 0-20ms using potentiometer. To read more details about PWM under PIC controller PIC16F1517 please keep PIC16F1517 datasheet with you. So we have to drop the idea of using CCP module and find a way to make our own PWM signals. We have also seen How to generate PWM Signal with PIC16F1517 Microcontroller? in my previous tutorials.īut the problem with our PIC16F1517 microcontroller can generate lowest possible PWM signal up to 1.22KHz only. To control servo motor in between -90° to +90° rotation we need to generate a PWM waveform of 50Hz with duty cycle variation from 1ms to 20ms. To know more about SG90 Servo motor go through in my previous tutorial How To Use SG90 Servo Motor with Arduino?. SG90 servo has a practical duty cycle time for -90° to +90 Rotation that is different from ideal. In this project also we will use SG90 Servo Motor. It is used in applications that demand to control over particular motion, like in case of control of a robotic arm, radio-controlled cars, puppets, and of course, robots. Servo motors are typically used in applications where precise small angular motion is required. The input to its control is a signal (either analog or digital) representing the position commanded for the output shaft.Ī servo motor consist of a DC motor, gearbox, and potentiometer to provide feedback information about the angular position of the motor to be controlled. A Servo Motor is a closed-loop servomechanism that uses position feedback to control its motion and final position.
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