How to Use Coin Reader: Examples, Pinouts, and Specs

The Allan c-02 Coin Reader is an electronic component designed to identify and validate coins for automated transaction systems. It is widely used in vending machines, arcade games, and other coin-operated devices. The device ensures accurate coin validation, enabling reliable monetary transactions.

• Vending machines for snacks, beverages, or tickets
• Arcade and gaming machines
• Public transportation ticketing systems
• Coin-operated laundry machines
• Self-service kiosks

1. Power Supply: Connect the VCC pin to a 12V DC power supply and the GND pin to the common ground.
2. Enable the Device: The ENABLE pin must be set high (connected to VCC) to activate the coin reader.
3. Coin Signal Output: Connect the COIN pin to a digital input on your microcontroller to detect coin insertions.
4. Serial Communication: Use the SERIAL_TX and SERIAL_RX pins to communicate with the coin reader using TTL serial communication.

• Ensure that the power supply is stable and within the specified voltage range to prevent damage.
• Avoid exposing the coin reader to extreme temperatures, moisture, or dust.
• Regularly calibrate the coin reader for accurate coin validation.
• Implement debounce logic in your software to handle the mechanical switch bounce typically associated with coin detection.

• Coin not recognized: Ensure the coin falls within the specified size range and is not damaged.
• False detections: Check for loose connections and ensure proper grounding.
• No response from the device: Verify that the ENABLE pin is set high and the power supply is correctly connected.

• Power Cycle: Turn off the power supply, wait a few seconds, and turn it back on.
• Check Connections: Inspect all connections for proper contact and secure fit.
• Serial Communication: Use a serial monitor to check for communication errors or misconfigurations.

Q: Can the Allan c-02 Coin Reader accept multiple currencies? A: It depends on the calibration and programming. Consult the manufacturer's guide for multi-currency support.

Q: How do I clean the coin reader? A: Use a soft, dry cloth to clean the exterior. Do not use liquid cleaners inside the coin path.

Q: What should I do if the coin reader is unresponsive? A: Check the power supply and connections. If the issue persists, contact Allan technical support.

// Example code for interfacing Allan c-02 Coin Reader with Arduino UNO

const int coinPin = 2; // COIN pin connected to digital pin 2
const int enablePin = 3; // ENABLE pin connected to digital pin 3

void setup() {
  pinMode(coinPin, INPUT);
  pinMode(enablePin, OUTPUT);
  digitalWrite(enablePin, HIGH); // Enable the coin reader
  Serial.begin(9600); // Start serial communication at 9600 baud rate
}

void loop() {
  if (digitalRead(coinPin) == HIGH) {
    // Coin detected
    Serial.println("Coin Inserted");
    // Add your coin handling code here
    delay(100); // Debounce delay
  }
}

Note: This example assumes a simple digital read for coin detection. For more advanced features like coin value identification, serial communication with the coin reader is required. Please refer to the Allan c-02 technical manual for serial command details.