Interfacing Servo Motor With Pic Microcontroller - Mplab Xc8 1r22j

11/12/2014

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Interfacing Servo Motor with PIC Microcontroller - MPLAB XC8

Interfacing Servo Motor with PIC Microcontroller – MPLAB XC8 B Y L I G O G E O RG E (HTTP : / / E L E CTRO S O ME . CO M/ A UTHO R/ L I J O P P A NS / ) / 2 CO MME NTS (HTTP : / / E L E CTRO S O ME . CO M/ S E RV O -MO TO R-P I C-MP L A B -X C8 / # DI S Q US _ THRE A D)

Keep Your Cloud Private All of Our Servers Are the Most Secure & Powerful. Chat to Save! Servo Motor is an ordinary geared dc motor equipped with closed loop servo mechanism which uses position to control exact angular position of the rotor. These are commonly used in robotic arms, legs etc. Servo Motors do not rotate continuously, their rotation is limited to fixed angles. Usually these motors have rotation limit from 90º to 180° and some special have limits 360° or more. Servo Motors usually have three wires. RED and BLACK wires are used to provide power.

(http://electrosome.com/wpRequired voltage will depend upon the type of content/s/2012/06/Servo-Motor.gif) servo you are using, so please refer the specifications given by the manufacture. The

Servo Motor (http://electrosome.com/servo-motor/)

third wire is used to provide control signals to control exact angular position of the servo motor. Its color varies for different manufactures such as YELLOW, BROWN, WHITE etc. Servo Motor shaft can be moved to desired position by using Pulse Width Modulated ( http://www.electrosome.com/pwm-pulse-width-modulation/)

(PWM

(

http://www.electrosome.com/pwm-pulse-width-modulation/)) signals on the control wire.

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Interfacing Servo Motor with PIC Microcontroller - MPLAB XC8

Unlike DC Motors, reversing the power supply polarity does not reverse the rotation instead of it may damage the control circuitry.

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Servo Motors can be easily interfaced with PIC Microcontroller. Here for demonstration we are using PIC 16F877A and VIGOR VS-10A servo motor. The required pulse width of this servo motor ranges from 800μS to 2200μS and rotation angle is greater than or equal to 170°. Its operating voltage range is 4.8V to 6V.

(http://electrosome.com/wp-content/s/2012/06/Servo-Angular-RotationPulse-Width-Modulation1.jpg) http://electrosome.com/servo-motor-pic-mplab-xc8/

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Interfacing Servo Motor with PIC Microcontroller - MPLAB XC8

Servo Angular Rotation Pulse Width Modulation ( http://electrosome.com/pwm-pulse-width-modulation/)

Circuit Diagram

(http://electrosome.com) (http://electrosome.com/cart/)

(http://electrosome.com/wp-content/s/2014/08/Interfacing-Servo-Motor-with-PICMicrocontroller.jpg) Interfacing Servo Motor with PIC Microcontroller (http://electrosome.com/servo-motor-pic-microcontroller/)

Tip : Use separate power supplies for PIC and Servo Motor OR use proper filtering capacitors otherwise ripples produced by the Servo Motor may affect the working of PIC.

MPLAB XC8 Code #define _XTAL_FREQ 8000000 #include <xc.h> // BEGIN CONFIG #pragma config FOSC = HS #pragma config WDTE = OFF http://electrosome.com/servo-motor-pic-mplab-xc8/

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#pragma config #pragma config #pragma config #pragma config #pragma config #pragma config //END CONFIG

Interfacing Servo Motor with PIC Microcontroller - MPLAB XC8

PWRTE = OFF BOREN = ON LVP = OFF D = OFF WRT = OFF = OFF

void servoRotate0() //0 Degree { unsigned int i; for(i=0;i<50;i++) { RB0 = 1; __delay_us(800); RB0 = 0; __delay_us(19200); } } void servoRotate90() //90 Degree { unsigned int i; for(i=0;i<50;i++) { RB0 = 1; __delay_us(1500); RB0 = 0; __delay_us(18500); } } void servoRotate180() //180 Degree { unsigned int i; for(i=0;i<50;i++) { RB0 = 1; __delay_us(2200); RB0 = 0; __delay_us(17800); } } void main() { TRISB = 0; // PORTB as Ouput Port do { servoRotate0(); //0 Degree http://electrosome.com/servo-motor-pic-mplab-xc8/

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Interfacing Servo Motor with PIC Microcontroller - MPLAB XC8

__delay_ms(2000); servoRotate90(); //90 Degree __delay_ms(2000); servoRotate180(); //180 Degree }while(1); }

Hope you can understand the working of the above program. If you have any doubts just comment below.

You can the entire project files here. Servo Motor (http://electrosome.com/wp-content/s/2014/08/Servo-Motor.zip)

Want to See the Output ?

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Interfacing Servo Motor with PIC Microcontroller - MPLAB XC8

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Interfacing Servo Motor with PIC Microcontroller - MPLAB XC8

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the discussion… Copper Masud

•

a month ago

MG996R how can i drive this servo , pleasee ?? your code dont work with this one..

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Ligo George

Mod

> Copper Masud • a month ago

use pulse width according to that servo specifications.

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RECENT COMMENTS Even if you are using 0.47 ohm resistor... it actual value may [..]

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You can connect TX to RX and RX to TX.. 3.3 and [..]

LIGO GEORGE (HTTP://WWW.ELECTROSOME.COM/) on Getting Started with PL2303 USB to UART Converter (http://electrosome.com/pl2303-usb-to-uartconverter/#comment-3320)

Yes it can. .but the accuracy of A/D converter degrades as Vref [..]

LIGO GEORGE (HTTP://WWW.ELECTROSOME.COM/) on Voltmeter and Ammeter using PIC Microcontroller (http://electrosome.com/voltmeter-ammeterpic/#comment-3319)

im sorry , i meant to say in series. I have used [..]

PREETHI SHIVANAND (MAILTO:[email protected]) on Voltmeter and Ammeter using PIC Microcontroller (http://electrosome.com/voltmeter-ammeterpic/#comment-3314)

I am new to pl2303. I want to interface this module to [..]

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Interfacing Servo Motor with PIC Microcontroller - MPLAB XC8

Hi, I want to build a multiple timer with 16F877a, ds1307, and [..]

NEYAMAT (MAILTO:[email protected]) on Interfacing Relay with PIC Microcontroller (http://electrosome.com/interfacing-relay-with-picmicrocontroller/#comment-3311)

Hi, what if, for example, my Vref+ is 20mV and my Vref- [..]

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Please post a tutorial on 50hz pure sinewave generator.

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