PROJECT 10 – SERIAL COMMUNICATION CONTROL RC SERVO

By tonynwk88 Arduino Motor/ Robot August 13, 2011

PROJECT 10

SERIAL COMMUNICATION CONTROL RC SERVO

Go to Project 11

Wondering how to control the RC servo motor through your PC/laptop? In this project, we are going to explore on how to control two RC servo’s position through the serial monitor of Arduino programmer. By sending the position from 0 to 180 will determine the servo position.

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	RC SERVO MOTOR
	JUMPER WIRE

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CONNECTION

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In this project, there are 2 RC servo motor signal wire (YELLOW) connected to Arduino Duemilanove digital pin-2 and pin-3. RED wire are connected to +5V while BLACK wire connected to ground(GND).

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CODE OVERVIEW

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int value;
Assign the value as integer to store the value of servo position from 0 to 180.

unsigned int old_value;
Store the last value of the servo position.

servo1.write(90);
Initialize and move the servo1 to 90 degree.

old_value = 90;
Set and store the position of servo to old_value.

If (value > 180) value = 180;
Check if the value is larger than 180. if yes then set it to maximum 180.

else if (value < 0) value = 0;
Check if the value is less than 0. if yes then set it to minimum 0.

if(value < old_value)
Check if the current value of servo position is less then the old_value or last value.

old_value = value;
Assign the current value to old_value as the memory for the microcontroller to determine servo position.

Back to Project 9

Go to Project 11

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ATTACHMENT

1. P10 User Manual.pdf
2. Project_10_code.zip

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