I finished the servo controller to control the heater box. It is ready to install.
I had to map the range of all the servos. This circuit reads the three pots and sends the position to the heater. It also turns off the servos after they have moved.
Fresh Air/Recirculation starts out with Rec. As you turn the knob, rec remains open and fresh begins to open. 1/2 way through both are full open. As you continue, the recirc closes till you have full fresh air.
This mix control is also applied to the floor and dash vent.
Defog/defrost is completely independent and controllable which has always been a pet peeve.
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