Switch Crash and Collision Sensor Module For Robot 3D Printers

Features:

1. High Sensitivity: Based on a high-sensitivity crash sensor that reacts instantly to mechanical contact.
2. Digital Output: Provides a digital signal (LOW when touched, HIGH when released).
3. Versatile Application: Ideal for touch detection and collision sensing in robots, 3D printers, and automation systems.
4. Simple Interface: Easy to use with microcontrollers like Arduino, AVR, ARM, and 8051.
5. Low Power Consumption: Operates efficiently with minimal current draw.
6. Durable Build: Mechanical spring-based sensor provides long operational life.
7. Compact Size: Small and lightweight, making it easy to mount on robotic chassis or mechanical arms.
8. Noise Immunity: Stable signal output with minimal false triggering under normal operation.

Specifications:

• Sensor Type: Digital mechanical contact sensor
• Sensitivity: High
• Power Supply Voltage: 5V DC
• Output Signal: Digital HIGH/LOW (TTL)
• Output Level:
  • LOW (0V) – when sensor is touched (collision/contact)
  • HIGH (5V) – when released (no contact)
• Operating Current: < 20mA
• Interface Type: 3-pin (Digital Signal, VCC, GND)
• Compatible Platforms: Arduino, AVR, ARM, 8051, STM32, Raspberry Pi (with level shifting)
• Module Dimensions: Approx. 30mm x 20mm

Pinout:

Principle of Operation:

The sensor module uses a mechanical switch that closes on physical contact (e.g., collision with an object). When triggered, the switch causes the module to output a LOW-level signal, which is read by a digital input pin of a microcontroller. When the contact is released, the output returns to HIGH. This allows simple and reliable contact detection for use in robotic obstacle sensing, bumpers, and edge detection.

Applications:

• Collision detection for mobile robots
• Mechanical touch sensing in robotic arms
• Crash sensing in 3D printers for auto-stop
• Limit switch replacement
• Simple contact-triggered controls in automation
• Anti-collision systems for DIY robots

Wiring with Arduino:

Example Code (Arduino):

// Crash Sensor Module Example
const int crashPin = 2;  // Connect OUT pin to digital pin 2
const int ledPin = 13;   // Onboard LED

void setup() {
  pinMode(crashPin, INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int crashState = digitalRead(crashPin);

  if (crashState == LOW) {
    Serial.println("Collision Detected!");
    digitalWrite(ledPin, HIGH); // Turn on LED
  } else {
    digitalWrite(ledPin, LOW);  // Turn off LED
  }

  delay(100);
}

Advantages:

• Very easy to use and program
• No complex signal processing required
• Works with basic and advanced microcontrollers
• Reliable for DIY and educational robotics projects

Notes:

• Sensor reacts only to physical contact (press/touch); not proximity or IR.
• Ensure correct orientation and pin connection to avoid module damage.
• If false triggers occur due to mechanical vibrations, consider software debouncing.

Resources:

• Compatible Arduino Libraries: Not required
• Datasheet: Not typically available (mechanical contact switch-based)
• Fritzing part: Use generic switch or custom module