MAX6675 temperature measurement module up to 1024 degrees

The MAX6675 module, together with a thermocouple, allows you to measure the temperature of objects and the environment. Connects to a K-type thermocouple sensor. The sensor measures temperature readings in the range 0 - 1024 °C. But since the thermocouple body is designed for 600°C, the maximum temperature that can be measured is 600°C. The adapter can be used in a soldering station, boiler, digital thermometer, oven or in devices where temperature control is required.

The temperature measurement module is based on the MAX6675 chip. The main task of the microcircuit is to convert the received K-type thermocouple signals into a digital temperature value. The sensor signal is sent to the operational amplifier of the microcircuit, and then it is processed by a 12-bit ADC (analogue-to-digital converter), after which the data is transferred to the microcontroller's memory via the SPI serial interface. There is no MOSI pin on the SPI bus, so the data from the chip is transmitted only to the controller. The main feature of the MAX6675 chip is the cold junction compensation function, which is implemented thanks to the built-in temperature sensor.

The sensor is connected to the Arduino platform using the SPI interface through 3 pins. The SCLK pin is required to transmit the clock signal, CS is used to select the microcircuit, and information is transmitted through the D0 pin from the temperature sensor to the microcontroller device.

5V power can be supplied to the sensor from an external power supply, Arduino Uno board, or other microcontroller device. Power for the sensor is supplied to the VCC (+5 V) and GND ("ground") pins.

The thermocouple terminals are connected to the clamp. The connection polarity is shown on the sensor board.

The MAX6675 sensor library is not a standard Arduino IDE library, so you need to download it and install it yourself.

Thermocouple and connecting wires are not included in the module package.

Module Specifications:

Chip MAX6675
Supply voltage, V 3 ... 5.5
Current consumption, mA 1.5
Temperature range measured by the module, °C 0 ... 1024
Thermocouple operating temperature range, °C 0 ... 600
Thermocouple cable length, m 0.5

Scheme for connecting the module to Arduino Uno: