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Arduino - Touch Sensor - Servo Motor
We will learn how to use Arduino and touch sensor switch to control the servo motor. In detail:
- If the touch sensor is touched, Arduino rotates servo motor to 90 degree
- If the touch sensor is touched again, Arduino rotates servo motor back to 0 degree.
That process is repeated.
Hardware Required
Or you can buy the following sensor kit:
| 1 | × | DIYables Sensor Kit 30 types, 69 units |
Please note: These are Amazon affiliate links. If you buy the components through these links, We will get a commission at no extra cost to you. We appreciate it.
About Servo Motor and Touch Sensor
If you do not know about servo motor and touch sensor (pinout, how it works, how to program ...), learn about them in the following tutorials:
Wiring Diagram
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Arduino Code - Touch Sensor Controls Servo Motor
/*
* Created by ArduinoGetStarted.com
*
* This example code is in the public domain
*
* Tutorial page: https://arduinogetstarted.com/tutorials/arduino-touch-sensor-servo-motor
*/
#include <Servo.h>
// constants won't change
const int TOUCH_SENSOR_PIN = 7; // Arduino pin connected to touch sensor's pin
const int SERVO_PIN = 9; // Arduino pin connected to servo motor's pin
Servo servo; // create servo object to control a servo
// variables will change:
int angle = 0; // the current angle of servo motor
int lastTouchState; // the previous state of touch sensor
int currentTouchState; // the current state of touch sensor
void setup() {
Serial.begin(9600); // initialize serial
pinMode(TOUCH_SENSOR_PIN, INPUT); // set arduino pin to input mode
servo.attach(SERVO_PIN); // attaches the servo on pin 9 to the servo object
servo.write(angle);
currentTouchState = digitalRead(TOUCH_SENSOR_PIN);
}
void loop() {
lastTouchState = currentTouchState; // save the last state
currentTouchState = digitalRead(TOUCH_SENSOR_PIN); // read new state
if(lastTouchState == LOW && currentTouchState == HIGH) {
Serial.println("The sensor is touched");
// change angle of servo motor
if(angle == 0)
angle = 90;
else
if(angle == 90)
angle = 0;
// control servo motor arccoding to the angle
servo.write(angle);
}
}
Quick Steps
- Connect Arduino to PC via USB cable
- Open Arduino IDE, select the right board and port
- Copy the above code and open with Arduino IDE
- Click Upload button on Arduino IDE to upload code to Arduino
- Touch the touch sensor several times.
- See the change of servo motor
Video Tutorial
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