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Did you build your TC4 board exactly like the schematic? Because in the picture of your board it seems that you used a decoupling capacitor between the positive and the negative leads of the thermocouples or am i mistaken? According to the schematic you also need to ground the positive and the negative lead of the thermocouple with a 10K resistor, but I don't understand why. Is it to set the common mode voltage or open thermocouple detection?Thank you
Electronics Crash Course
LEDs and Lighting Class
Your First Experiments
Tools and Materials for Arduino
Welcome to Arduino
The 'One Chip Spinning RGB POV Display' with conversion software.
LED Matrix Glasses: First Prototype
Wireless Power Charger!
Make a giant LED sign! (24x8 Matrix)
Perfboard Hackduino ($8 Arduino-compatible circuit)