Circuit Documentation

Summary

This circuit is a coin counting machine that uses multiple IR sensors to detect coins and displays the count on a 16x2 I2C LCD. The circuit is controlled by an Arduino UNO microcontroller. The coin values detected are 1 peso, 5 peso, 10 peso, and 20 peso.

Component List

1. 16x2 I2C LCD

   • Description: A 16x2 character LCD display with I2C interface.
   • Pins: GND, VCC, SDA, SCL

2. Arduino UNO

   • Description: A microcontroller board based on the ATmega328P.
   • Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

3. IR Sensor

   • Description: Infrared sensor used to detect the presence of coins.
   • Pins: out, gnd, vcc

4. Resistor

   • Description: A resistor with a resistance of 1000 Ohms.
   • Pins: pin1, pin2
   • Properties: Resistance: 1000 Ohms

Wiring Details

16x2 I2C LCD

• GND connected to GND of Arduino UNO
• VCC connected to 5V of Arduino UNO
• SDA connected to A4 of Arduino UNO
• SCL connected to A5 of Arduino UNO

Arduino UNO

• 5V connected to VCC of all IR Sensors and 16x2 I2C LCD
• GND connected to GND of 16x2 I2C LCD
• D10 connected to out of one IR Sensor
• D11 connected to out of another IR Sensor
• D12 connected to out of another IR Sensor
• D13 connected to out of another IR Sensor
• A4 connected to SDA of 16x2 I2C LCD
• A5 connected to SCL of 16x2 I2C LCD

IR Sensor 1

• vcc connected to 5V of Arduino UNO
• gnd connected to pin2 of a Resistor
• out connected to D10 of Arduino UNO

IR Sensor 2

• vcc connected to 5V of Arduino UNO
• gnd connected to pin2 of a Resistor
• out connected to D11 of Arduino UNO

IR Sensor 3

• vcc connected to 5V of Arduino UNO
• gnd connected to pin2 of a Resistor
• out connected to D12 of Arduino UNO

IR Sensor 4

• vcc connected to 5V of Arduino UNO
• gnd connected to pin2 of a Resistor
• out connected to D13 of Arduino UNO

Resistor 1

• pin1 connected to GND
• pin2 connected to gnd of IR Sensor 1

Resistor 2

• pin1 connected to GND
• pin2 connected to gnd of IR Sensor 2

Resistor 3

• pin1 connected to GND
• pin2 connected to gnd of IR Sensor 3

Resistor 4

• pin1 connected to GND
• pin2 connected to gnd of IR Sensor 4

Code Documentation

Arduino UNO Code

/*
 * Coin Counting Machine
 * This code reads inputs from IR sensors to detect coins and displays the
 * count on a 16x2 I2C LCD. The coin values are 1 peso, 5 peso, 10 peso, and
 * 20 peso.
 */

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// Initialize the LCD, set the LCD address to 0x27 for a 16 chars and 2 line
LiquidCrystal_I2C lcd(0x27, 16, 2);

// IR sensor pins
const int irSensor1 = 13;
const int irSensor2 = 12;
const int irSensor3 = 11;
const int irSensor4 = 10;

// Coin counts
int count1Peso = 0;
int count5Peso = 0;
int count10Peso = 0;
int count20Peso = 0;

void setup() {
  // Initialize the LCD
  lcd.begin();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Coin Counter");

  // Initialize IR sensor pins
  pinMode(irSensor1, INPUT);
  pinMode(irSensor2, INPUT);
  pinMode(irSensor3, INPUT);
  pinMode(irSensor4, INPUT);
}

void loop() {
  // Check IR sensors
  if (digitalRead(irSensor1) == LOW) {
    count1Peso++;
    displayCount();
    delay(500); // Debounce delay
  }
  if (digitalRead(irSensor2) == LOW) {
    count5Peso++;
    displayCount();
    delay(500); // Debounce delay
  }
  if (digitalRead(irSensor3) == LOW) {
    count10Peso++;
    displayCount();
    delay(500); // Debounce delay
  }
  if (digitalRead(irSensor4) == LOW) {
    count20Peso++;
    displayCount();
    delay(500); // Debounce delay
  }
}

void displayCount() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("1P: ");
  lcd.print(count1Peso);
  lcd.setCursor(8, 0);
  lcd.print("5P: ");
  lcd.print(count5Peso);
  lcd.setCursor(0, 1);
  lcd.print("10P: ");
  lcd.print(count10Peso);
  lcd.setCursor(8, 1);
  lcd.print("20P: ");
  lcd.print(count20Peso);
}

IR Sensor Code

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

This concludes the documentation for the coin counting machine circuit.