Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfaced with a MAX6675 thermocouple module and a 16x2 I2C LCD display. The circuit is powered by a 5V battery. The Arduino UNO reads temperature data from the MAX6675 module and displays it on the 16x2 I2C LCD.

Component List

1. MAX6675 Module

   • Description: Thermocouple-to-Digital Converter
   • Pins: GND, VCC, SCK, CS, SO, -, +

2. Arduino UNO

   • Description: Microcontroller Board
   • 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. 16x2 I2C LCD

   • Description: 16x2 Character LCD with I2C Interface
   • Pins: GND, VCC, SDA, SCL

4. 5V Battery

   • Description: Power Supply
   • Pins: positive, negative

Wiring Details

MAX6675 Module

• GND connected to Arduino UNO GND
• VCC connected to 5V Battery positive
• SCK connected to Arduino UNO D13
• CS connected to Arduino UNO D10
• SO connected to Arduino UNO D12

Arduino UNO

• 5V connected to 5V Battery positive
• GND connected to 5V Battery negative
• GND connected to MAX6675 Module GND
• D13 connected to MAX6675 Module SCK
• D12 connected to MAX6675 Module SO
• D10 connected to MAX6675 Module CS
• A4 connected to 16x2 I2C LCD SDA
• A5 connected to 16x2 I2C LCD SCL

16x2 I2C LCD

• GND connected to 5V Battery negative
• VCC connected to 5V Battery positive
• SDA connected to Arduino UNO A4
• SCL connected to Arduino UNO A5

5V Battery

• positive connected to Arduino UNO 5V
• positive connected to MAX6675 Module VCC
• positive connected to 16x2 I2C LCD VCC
• negative connected to Arduino UNO GND
• negative connected to 16x2 I2C LCD GND

Code Documentation

Arduino UNO Code

Sketch File (sketch.ino)

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

}

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

}

Documentation File (documentation.txt)

#include <max6675.h> // Include the MAX6675 library

// Define pins connected to the MAX6675 module
int SO_pin = 12; // Serial Output pin
int SCK_pin = 13; // Clock pin
int CS_pin = 10; // Chip Select pin

// Initialize MAX6675 object
MAX6675 thermocouple(SCK_pin, CS_pin, SO_pin);

void setup() {
  Serial.begin(9600); // Start serial communication for debugging
  Serial.println("Thermocouple Test");
  delay(500); // Allow some time for initialization
}

void loop() {
  // Read temperature in Celsius
  double tempC = thermocouple.readCelsius();

  // Print temperature to the Serial Monitor
  if (tempC != NAN) {
    Serial.print("Temperature: ");
    Serial.print(tempC);
    Serial.println(" °C");
  } else {
    Serial.println("Thermocouple not connected!");
  }

  delay(1000); // Update every second
}