MAX31855 K-Type Thermocouple Reader

Read a K-type thermocouple from -200 to +1350 degrees Celsius over SPI — the chip behind every reflow oven controller and pizza-oven smart thermometer.

Difficulty: Breadboard. Estimated build time: about 30 minutes. Estimated parts cost: about US$9.50. 6-part bill of materials with live supplier pricing. A microcontroller-friendly digitizer for K-type thermocouples that returns calibrated temperature over SPI.