SparkFun Thermocouple Breakout - MAX31855K

The SparkFun MAX31855K Thermocouple Breakout is a simple 14-bit resolution SPI-compatible serial interface thermocouple digitizer that makes reading a wide range of temperatures possible. A thermocouple works by taking two wires made of dissimilar metals connecting them at the two ends and making a temperature gradient between one end and the other (a 'hot' end and a 'cold' one). Once this is achieved a voltage potential is formed and current flows. The SparkFun Thermocouple Breakout takes a standard Type-K thermocouple in one end digitizes the temperature measured and sends that data out the other end via a SPI interface thereby interpreting the data and translating it for you to read!With the SparkFun Thermocouple Breakout the thermocouple’s hot junction can be read from -200°C to +700°C with an accuracy of ±2°C while the cold junction inside the MAX31855K can only range from -20°C to +85°C while maintaining ±2°C accuracy. The MAX31855K constantly measures the temperature of the cold junction using an internal temperature-sensing diode. The MAX31855K requires a power source from +3.0V to +3.6V (+3.0V nominal) and only draws 1.5mA maximum.The Thermocouple Breakout is designed to accept a standard thermocouple connector for convenience and compatibility with probes you may already own. These connectors aren’t necessary and you could solder a thermocouple directly into the through-holes labeled ‘+’ and ‘-’. If you decide to solder the thermocouple directly to the breakout board it is recommended that the thermocouple be mounted for strain relief to avoid breaking the thin wires. Notches for a zip-tie or wire wrapping have been provided in the PCB opposite the header for this purpose. Features:14-bit ResolutionSPI-Compatible Serial Interface-200°C to +700°C Temperature Reading with ±2°C Accuracy3.0V to 3.6V (+3.0V nominal) RequiredAccepts Type-K ThermocoupleDocuments:SchematicEagle FilesHookup GuideDatasheet (MAX31855K)GitHub (Design Files)GitHub (Library & Example Code)