Project:Sanguinololu Thermocouple

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[[|Sanguinololu Thermocouple]]
Created 03/11/2012
Version 1
Members Pinski1
Project Status Awaiting PCBs
QR code


I wanted to add a thermocouple to my 3D printer's hot end. Ideally it would improve the quality of my printed objects as it would provide more accurate temperature readings with greater immunity from electronic noise generated by the stepper motors.


The PCB I have designed has the following features:

  • Fits onto the expansion headers already present on the Sanguinololu
  • Adds a MAX31855 temperature sensing chip
  • Enables temperature readings between -750degC and +1350degC +-2degC
  • Has a resolution of 0.25degC



Eagle 5.11 file:

PCB Layout

Eagle 5.11 file:


  • MAX31855K
  • TXB0104D
  • TPS73033DBVT (any SOT-23-5 +3V3 voltage regulator)
  • 10nF 0805
  • 2.2uF 1206
  • 2x5 way female socket
Qty Value Ident Description
1 IC1 MAX31855K SOIC8 Thermocouple-to-Digital chip
1 IC2 TXB0104D SOIC14 Bi-Directional level translator chip
1 IC3 TPS73033DBVT Could be any SOT23-5 +3V3 voltage regulator
2 10nF C2, C3 Ceramic 0805 decoupling capacitors


How to Build


This design is licensed under Creative Commons BY-NC-SA

This design is modified from Sanguinololu SD