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README: Add section on using resistive heaters

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atse 2024-10-14 11:33:41 +08:00
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README.md
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@ -187,6 +187,12 @@ If the Thermostat is used for temperature control with the Sinara 5432 DAC "Zoti
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.
## Resistive Heater
When using resistive heaters with the Thermostat, ensure that the thermal load has sufficient cooling, and connect the heater to TEC0- and TEC0+ or TEC1- and TEC1+.
Then, set `max_i_neg` and `output_min` to 0 A with `pwm <ch> max_i_neg 0` and `pid <ch> output_min 0`, and make sure that `output_max` is non-negative.
### Limits ### Limits
Each MAX1968 TEC driver has analog/PWM inputs for setting Each MAX1968 TEC driver has analog/PWM inputs for setting