1-Wire Thermocouple

1-Wire Thermocouple is a thermocouple to 1-wire converter board built around Maxim MAX31850 cold-junction compensated 1-Wire thermocouple-to-digital converter chip. The chip works only with 3.3V supply and logic level and there is on-board 3.3V LDO regulator and level converter for compatibility with 5V based 1-Wire networks. Due to the level shifting of the 1-Wire signals the only powering option is via 5V supply i.e. using parasite power is not supported.


  • 1-Wire device: Maxim MAX31850
  • Thermocouple type: K (other types are supported by specific chip from the same family)
  • Resolution: 14-bit, 0,25°C
  • Temperature range: -200°C to +700°C
  • Accuracy: 2°C
  • Supply voltage: 5V
  • Parasite power: not supported
  • 1-Wire logic level: 5V
  • 1-Wire connector: RJ12 or RJ45




  • Bare PCB: 3€ 
  • Pre-assembled: 19€