MAX6675 Thermocouple with Arduino | K-Type Temperature Sensor Tutorial

In this video, we’ll learn how to interface the MAX6675 K-Type Thermocouple Module with Arduino and measure high temperatures using the Arduino’s built-in SPI communication.

We’ll first understand how a thermocouple works, including the Seebeck effect and cold-junction compensation. Then, we’ll look at the MAX6675 module, its pinout, wiring, SPI communication, 16-bit data format, and how to extract and convert the temperature data.

We’ll also write the Arduino code without using the dedicated MAX6675 library, allowing us to directly communicate with the module using Arduino’s built-in SPI.h library.

📌In this video you’ll learn:

✅ What a thermocouple is and how it works
✅ What the Seebeck effect / thermoelectric effect is
✅ What the hot junction and cold junction are
✅ Why cold-junction compensation is necessary
✅ What the MAX6675 does
✅ How the MAX6675 communicates with Arduino using SPI
✅ MAX6675 module pinout and wiring
✅ How to connect a K-Type thermocouple
✅ How to use Arduino’s built-in SPI library
✅ How to configure SPISettings()
✅ Understanding SPI clock speed, MSB-first, and SPI Mode 0
✅ Understanding the MAX6675’s 16-bit data format
✅ How the 12-bit temperature data is stored
✅ Why each digital step represents 0.25°C
✅ How to detect a disconnected thermocouple
✅ How bitwise AND is used to check the thermocouple status bit
✅ How bit shifting extracts the temperature value
✅ How to convert the received digital value into degrees Celsius
✅ How to display the temperature on the Arduino Serial Monitor

📚 Recommended Video

• Interfacing DHT11 and DHT22 Sensor With Arduino: [ https://www.youtube.com/watch?v=av8dM9iM-0o&list=PLBZJhPWICzfyGNH_-EOC5tQy5IdhfHGbH&index=27 ]

• Interfacing LM35 temperature sensor with Arduino: [ https://www.youtube.com/watch?v=SYYHuvWHq1Q&list=PLBZJhPWICzfyGNH_-EOC5tQy5IdhfHGbH&index=49 ]

• Interfacing TMP36 sensor with Arduino: [ https://www.youtube.com/watch?v=WZ8GWfokEHU&list=PLBZJhPWICzfyGNH_-EOC5tQy5IdhfHGbH&index=50 ]

• Interfacing DS18B20 sensor with Arduino: [ https://www.youtube.com/watch?v=E1DsRvAQ_fY&list=PLBZJhPWICzfyGNH_-EOC5tQy5IdhfHGbH&index=51 ]

• SPI communication explained: [ https://www.youtube.com/watch?v=z3nR78F37rc&list=PLBZJhPWICzfyGNH_-EOC5tQy5IdhfHGbH&index=53 ]

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