The MAX6675 is a cold-junction compensated K-type thermocouple-to-digital converter IC. It is commonly used with K-type thermocouples to measure high temperatures (0 °C to 1024 °C) and provides the temperature data digitally via an SPI interface, making it easy to use with Arduino, ESP32, and Raspberry Pi. 🔹 Details and Explanation Type: Thermocouple-to-digital converter IC Supported Sensor: K-type thermocouple Temperature Range: 0 °C to +1024 °C Resolution: 12-bit (0.25 °C per step) Accuracy: ±2 °C (typical) Output Interface: SPI (Serial Peripheral Interface) Operating Voltage: 3.0V – 5.5V (works directly with 5V Arduino and 3.3V ESP boards) Cold Junction Compensation: Automatically compensates for ambient temperature (reference junction). 🔹 Working Principle The K-type thermocouple generates a small voltage depending on the temperature difference between its measuring tip and the reference junction. The MAX6675 amplifies this voltage and performs cold-junction compensation (so you don’t need extra sensors). The IC converts the temperature into a digital signal and sends it to a microcontroller over SPI. 🔹 Pin Configuration (MAX6675 module with K-type thermocouple) VCC: 3.3V – 5V supply GND: Ground SCK: Serial Clock (from microcontroller) CS: Chip Select SO: Serial Data Out (temperature data) 🔹 Applications Industrial furnaces and heaters 3D printers and CNC machines Food and chemical processing industries Temperature monitoring in kilns, boilers, and engines Scientific experiments requiring high-temp measurements