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sinara-hw / Zotino

ARTIQ - compatible 32 channel DAC card in EEM standard
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TEC polarity on IDC connector opposite from Thermostat #38

Open QQ80 opened 8 months ago

QQ80 commented 8 months ago

The TEC polarity of the IDC connector for the temperature regulator is opposite from the one on the Thermostat.

Thermostat: image

Zotino: image

This is probably because Zotino's layout was based on the Thermostat's before its TEC polarity label fix. The signals themselves on the Thermostat never changed, only the labels, but the wiring on the Zotino then based its TEC polarity layout on the pre-switched labels, effectively flipping it.

QQ80 commented 8 months ago

Here's the difference in PCB view:

Thermostat: image

Zotino: image

It's not clear to me which should be switched, the Thermostat's or the Zotino's.