Robotics Touch Sensor — Free Robotics Tutorial
Learn Robotics Touch Sensor in Robotics with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Robotics Touch Sensor in Robotics with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Robotics Touch Sensor in Robotics
Touch sensors (buttons, switches) are the simplest digital sensors. They return 0 (not pressed) or 1 (pressed). Used for collision detection, mode selection, or emergency stop.
A pushbutton is just a switch that creates/breaks a circuit. When wired with a pull-up resistor, pressing the button pulls the pin LOW (active-low logic).
Debouncing is essential: mechanical switches "bounce" (make/break contact multiple times) in ~10–20 ms. Software debouncing avoids false triggers.
Robotics Touch Sensor — Syntax
// Arduino: Button with pull-up
const int buttonPin = 2;
pinMode(buttonPin, INPUT_PULLUP);
int buttonState = digitalRead(buttonPin);
if (buttonState == LOW) { // Button pressed
Serial.println("Button pressed!");
}
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