How to Use SPDT Slide Switch (COM-00102): Examples, Pinouts, and Specs

The Single Pole Double Throw (SPDT) Slide Switch (COM-00102) is a compact and versatile mechanical switch designed to toggle between two different circuits or states. It features three terminals: one common terminal (COM) and two output terminals (typically labeled as NO and NC). This switch allows a single input to be connected to one of two outputs, making it ideal for applications requiring simple circuit selection or mode switching.

• Power routing between two devices or circuits
• Mode selection in electronic devices
• Signal switching in audio or communication systems
• DIY electronics projects and prototyping
• Control of LEDs, motors, or other components in small circuits

The SPDT Slide Switch (COM-00102) is designed for low-power applications and offers reliable performance in a variety of scenarios.

The SPDT Slide Switch is straightforward to use in a circuit. Follow the steps below to integrate it into your project:

1. Identify the Terminals: Locate the three terminals on the switch: COM, NO, and NC.
2. Connect the Common Terminal (COM): Connect the input signal or power source to the COM terminal.
3. Connect the Output Terminals (NO and NC):
   • Connect the NO terminal to the circuit or device you want to activate when the switch is in the ON position.
   • Connect the NC terminal to the circuit or device you want to activate when the switch is in the OFF position.
4. Mount the Switch: Secure the switch to your project using its through-hole mounting pins.
5. Test the Circuit: Slide the switch to toggle between the NO and NC terminals, verifying that the desired circuits or devices are activated.

• Voltage and Current Ratings: Ensure the connected circuits do not exceed the switch's rated voltage (12V DC) and current (0.5A).
• Debouncing: Mechanical switches may produce noise or "bouncing" when toggled. Use a capacitor or software debouncing techniques if the switch is used in digital circuits.
• Mounting: Avoid excessive force when mounting the switch to prevent damage to the terminals or housing.
• Soldering: Use a soldering iron with a temperature below 350°C to avoid damaging the switch during installation.

The SPDT Slide Switch can be used with an Arduino UNO to toggle between two states, such as turning an LED on or off.

• Connect the COM terminal to a digital input pin on the Arduino (e.g., pin 2).
• Connect the NO terminal to 5V.
• Connect the NC terminal to GND.

// SPDT Slide Switch Example with Arduino UNO
// This code reads the state of the SPDT switch and toggles an LED accordingly.

const int switchPin = 2;  // Pin connected to the COM terminal of the switch
const int ledPin = 13;    // Pin connected to the onboard LED

void setup() {
  pinMode(switchPin, INPUT);  // Set the switch pin as input
  pinMode(ledPin, OUTPUT);    // Set the LED pin as output
}

void loop() {
  int switchState = digitalRead(switchPin);  // Read the state of the switch

  if (switchState == HIGH) {
    // If the switch is in the ON position (connected to NO terminal)
    digitalWrite(ledPin, HIGH);  // Turn the LED on
  } else {
    // If the switch is in the OFF position (connected to NC terminal)
    digitalWrite(ledPin, LOW);   // Turn the LED off
  }
}

Q: Can this switch handle AC voltage?
A: The SPDT Slide Switch (COM-00102) is rated for DC voltage only. Using it with AC voltage may damage the switch or cause unsafe operation.

Q: How do I debounce the switch in software?
A: You can use a delay or a state-change detection algorithm in your code to filter out noise caused by mechanical bouncing.

Q: Can I use this switch to control high-power devices?
A: No, this switch is designed for low-power applications (12V DC, 0.5A max). Use a relay or transistor for high-power devices.

Q: Is the switch waterproof?
A: No, the SPDT Slide Switch (COM-00102) is not waterproof. Avoid exposing it to moisture or liquids.