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README: Correct expected TEC polarity #83

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sb10q merged 1 commits from atse/thermostat:fix-docs-polarity into master 2023-08-21 20:59:02 +08:00
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@ -184,7 +184,7 @@ postfilter rate can be tuned with the `postfilter` command.
- Connect TEC module device 1 to TEC1- and TEC1+. - Connect TEC module device 1 to TEC1- and TEC1+.
- The GND pin is for shielding not for sinking TEC module currents. - The GND pin is for shielding not for sinking TEC module currents.
When using a TEC module with the Thermostat, the Thermostat expects the thermal load (where the thermistor is located) to heat up with a positive software current set point, and cool down with a negative current set point. When using a TEC module with the Thermostat, the Thermostat expects the thermal load (where the thermistor is located) to cool down with a positive software current set point, and heat up with a negative current set point.
Testing heat flow direction with a low set current is recommended before installation of the TEC module. Testing heat flow direction with a low set current is recommended before installation of the TEC module.