So I just found out why my Ultimaker temp measurements are off. Turns out some idiot thought referencing the ADC to USB +5V was a good idea.
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Typical arduino coder: why use the built-in accurate voltage reference when you can use USB VBUS? Yeah, let's do that.
I can't believe I'm the first one to notice this. Way to put a fancy thermocouple and preamp IC and then completely *destroy* accuracy.
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Yea, the +5V from Usb is super noisy! I once neeed it and had to use big inductors/caps to filter it.
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Oh - thermocouple. I just thought about the usual thermistor. Then they really screwed that...
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Obviously made by a millenial/hipster, "analog" means you need the noise to give it that "authentic warmth" :P
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