The MAX6675K board (often referred to as a MAX6675 module) is a popular, specialized breakout board designed to interface a K-type thermocouple with microcontrollers like Arduino, Raspberry Pi, or ESP32. It converts the tiny analog voltage generated by a thermocouple into a digital, 12-bit SPI-compatible signal, allowing for precise, high-temperature readings (up to 1024°C) without needing to perform complex analog-to-digital conversions on the main microcontroller.�
The core component is the MAX6675 IC from Maxim Integrated, which reads the voltage from a K-type thermocouple and converts it directly to a digital temperature value.
Thermocouples need to know the temperature at the connection point (cold junction) to calculate the temperature at the tip (hot junction). The MAX6675 includes built-in sensors for automatic compensation.
It can measure temperatures ranging from 0°C to +1024°C (though the probe itself might limit this to lower ranges like 600°C–800°C) with a resolution of 0.25°C.
Uses a simple 3-wire SPI-compatible interface (CS, SO, SCK) for communication.
The module includes circuitry to detect if the thermocouple wire is broken or disconnected.
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