How to Use LilyPad Slide Switch: Examples, Pinouts, and Specs

The LilyPad Slide Switch (Manufacturer Part ID: DEV-09350) is a compact, low-profile switch designed by SparkFun Electronics for use in wearable electronics. This switch allows users to easily turn devices on or off with a simple sliding motion. Its lightweight and sewable design make it ideal for e-textile projects and other applications where space and flexibility are critical.

• Wearable electronics and e-textiles
• Battery-powered devices requiring an on/off switch
• Interactive clothing and accessories
• Prototyping small, portable circuits

The LilyPad Slide Switch is designed to integrate seamlessly into wearable projects. Below are its key technical details:

The LilyPad Slide Switch has three connection points (sewable pads) for easy integration into circuits. The table below describes each pin:

The LilyPad Slide Switch is straightforward to use in circuits. Follow the steps below to integrate it into your project:

1. Sewing the Switch:

   • Use conductive thread to sew the switch onto your fabric or project base.
   • Ensure the thread connects the appropriate pads (Pin 1, Pin 2, and/or Pin 3) to your circuit components.
   • Avoid overlapping threads to prevent short circuits.

2. Connecting to a Circuit:

   • Connect Pin 1 to the power source or signal input.
   • Connect Pin 2 to the device or circuit you want to power when the switch is ON.
   • Optionally, connect Pin 3 to a secondary circuit or leave it unconnected if not needed.

3. Testing the Switch:

   • Slide the switch to the ON position to connect Pin 1 and Pin 2.
   • Slide it to the OFF position to disconnect Pin 1 and Pin 2, and optionally connect Pin 1 to Pin 3.

The LilyPad Slide Switch can be used to control power or signals in Arduino projects. Below is an example of using the switch to toggle an LED:

• Connect Pin 1 of the switch to the 5V pin on the Arduino.
• Connect Pin 2 of the switch to one leg of a 220-ohm resistor.
• Connect the other leg of the resistor to the anode (long leg) of an LED.
• Connect the cathode (short leg) of the LED to the Arduino's GND pin.

// This code demonstrates how to use the LilyPad Slide Switch to control an LED.
// When the switch is ON, the LED will light up.

const int ledPin = 13; // Pin connected to the LED
const int switchPin = 2; // Pin connected to the switch

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

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

  if (switchState == HIGH) {
    digitalWrite(ledPin, HIGH); // Turn the LED on if the switch is ON
  } else {
    digitalWrite(ledPin, LOW); // Turn the LED off if the switch is OFF
  }
}

• Ensure the conductive thread connections are tight and secure to avoid intermittent connections.
• Avoid exposing the switch to moisture, as it may affect its performance in wearable applications.
• Test the switch's functionality before sewing it into your final project to ensure proper operation.

1. The switch does not turn the circuit on or off.

   • Check the conductive thread connections for continuity.
   • Ensure the switch is properly sewn into the circuit and the pads are not shorted.

2. The circuit behaves erratically when the switch is used.

   • Verify that the conductive threads are not overlapping or touching unintentionally.
   • Check for loose connections or frayed thread ends.

3. The switch feels stuck or does not slide smoothly.

   • Inspect the switch for debris or damage.
   • Gently clean the switch with a soft, dry cloth.

Q: Can the LilyPad Slide Switch handle higher voltages or currents?
A: No, the switch is rated for a maximum of 5V and 300mA. Exceeding these limits may damage the switch.

Q: Can I use the switch in non-wearable projects?
A: Yes, the switch can be used in any low-power circuit where a compact, SPDT switch is required.

Q: How do I sew the switch securely onto fabric?
A: Use multiple loops of conductive thread through each pad to ensure a strong connection. Knot the thread securely to prevent it from unraveling.

By following this documentation, you can effectively integrate the LilyPad Slide Switch into your wearable or electronic projects!