Chevrolet Aveo T300 / Sonic heater blend door actuator passager side.
Voltage is applied to the actuator from the moment of bringing ignition key in ON position. Actuator has only 2 wires. No feadback. This forces the actuator until the plastic components fails. Bad design.
To overcome this deficiency I have designed a circuit with the PIC12F675. Circuit detects actuator overload and disconnects. When it receives a command to rotate in reverse the proces repets. Code is written in Great Cow BASIC.
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errata: If you use chip IXDD604PI JUPER JP4 should not be closed. Should not be linking pin PIC12F675 GP0 to ENB / A -ENB / B.
IXDD604PI needs to ENB / A - ENB / B voltage greater than 7 volts. VDD will connect to the ENB / A - ENB / B chip IXDD604PI.
The actuator is switched off by applying both wires to GND, driving GP1 & GP4 to LOW
If you use MPC14E3 no need for this correction.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Chevrolet Aveo T300 / Sonic heater blend door actuator passager side.
Voltage is applied to the actuator from the moment of bringing ignition key in ON position. Actuator has only 2 wires. No feadback. This forces the actuator until the plastic components fails. Bad design.
To overcome this deficiency I have designed a circuit with the PIC12F675. Circuit detects actuator overload and disconnects. When it receives a command to rotate in reverse the proces repets. Code is written in Great Cow BASIC.
actuator inside
schematic
PCB
Source code
Nice project. Thanks for uploading.
You should post to Indestructibles also as this looks like a good approach to a common motor driving problem.
:-)
Video on Youtube : https://www.youtube.com/watch?v=c6WrSaCn_6A&feature=youtu.be
errata: If you use chip IXDD604PI JUPER JP4 should not be closed. Should not be linking pin PIC12F675 GP0 to ENB / A -ENB / B.
IXDD604PI needs to ENB / A - ENB / B voltage greater than 7 volts. VDD will connect to the ENB / A - ENB / B chip IXDD604PI.
The actuator is switched off by applying both wires to GND, driving GP1 & GP4 to LOW
If you use MPC14E3 no need for this correction.