Circuit Documentation

Summary

This circuit integrates a MAX6675 Module with an Arduino UNO to measure temperature. The MAX6675 is a thermocouple-to-digital converter that outputs a digital signal proportional to the temperature it measures. The Arduino UNO reads this digital signal and processes it to display the temperature in both Celsius and Fahrenheit on the serial monitor. The communication between the MAX6675 Module and the Arduino UNO is established through an SPI-like interface.

Component List

MAX6675 Module

• Description: A thermocouple-to-digital converter module that measures temperature.
• Pins: GND, VCC, SCK, CS, SO, -, +

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0-A5, SCL, SDA, AREF, D0-D13

Wiring Details

MAX6675 Module

• GND: Connected to Arduino UNO GND
• VCC: Connected to Arduino UNO 5V
• SCK: Connected to Arduino UNO Digital Pin 6
• CS: Connected to Arduino UNO Digital Pin 5
• SO: Connected to Arduino UNO Digital Pin 4

Arduino UNO

• GND: Connected to MAX6675 Module GND
• 5V: Connected to MAX6675 Module VCC
• D6: Connected to MAX6675 Module SCK
• D5: Connected to MAX6675 Module CS
• D4: Connected to MAX6675 Module SO

Documented Code

/*
  MAX6675 Arduino Code
  This code reads the temperature data from a MAX6675 module and prints the temperature
  in both Celsius and Fahrenheit to the serial monitor every second.
  The MAX6675 module is interfaced with the Arduino UNO using SPI-like communication.
  Connections are as follows:
  - MAX6675 VCC to Arduino 5V
  - MAX6675 GND to Arduino GND
  - MAX6675 SCK to Arduino Digital Pin 6
  - MAX6675 CS to Arduino Digital Pin 5
  - MAX6675 SO to Arduino Digital Pin 4
*/

#include "max6675.h"

// Define the Arduino pins, the MAX6675 module is connected to
int SO_PIN = 4;  // Serial Out (SO) pin
int CS_PIN = 5;  // Chip Select (CS) pin
int SCK_PIN = 6; // Clock (SCK) pin

// Create an instance of the MAX6675 class with the specified pins
MAX6675 thermocouple(SCK_PIN, CS_PIN, SO_PIN);

void setup() {
  Serial.begin(9600); // Start the serial communication with baud rate of 9600
  delay(500); // Wait for 500 milliseconds for MAX6675 to stabilize
}

void loop() {
  // Read the current temperature and print it to the serial monitor

  // Read the temperature in Celsius
  Serial.print("Temperature: ");
  Serial.print(thermocouple.readCelsius());
  Serial.print("\xC2\xB0"); // shows degree symbol
  Serial.print("C  |  ");

  // Read the temperature in Fahrenheit
  Serial.print(thermocouple.readFahrenheit());
  Serial.print("\xC2\xB0"); // shows degree symbol
  Serial.println("F");

  delay(1000); // Wait for 1000 milliseconds before reading the temperature again
}

The code provided is for the Arduino UNO and is responsible for initializing the MAX6675 module, reading the temperature data, and printing it to the serial monitor. The temperature is displayed in both Celsius and Fahrenheit. The code includes comments that describe the purpose of each section and the connections between the Arduino UNO and the MAX6675 module.