I posted here before and got a lot of great help. I have all my buttons working for fan speed, etc.
The last piece I need to try and figure out is the temperature control. I have a 91 camaro so it is running the cable driven temperature control. I need to figure out what piece I need to buy in order to control it from the fusion brain. I bought a "Heater A/C AC Servo Flap Vent Control Motor Actuator Air 99-04 Audi A6 Quattro"
Is this the right part, or what part do I need to get this up and running, and how do I go about programming it into my system?
Fusion Brain Version 6 Released!
1.9in x 2.9in -- 47mm x 73mm
30 Digital Outputs -- Directly drive a relay
15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
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I've been thinking of a similar servo to replace a busted knob (direct on the water valve which is on the heater core in the cab) and to avoid mechanical cabling issues.
Many seem to be 5 or 6 wire interfaces because they have position sensors. Whilst the sensors may be important for flap control, I have no need for them if it's to be for temperature control. IE - cabin too hot, close a bit; cab too cold, open a bit. Position is essentially irrelevant except maybe for end of travel, but I'll probably use current sensing for that (as I intend to do for my window controllers). And hopefully my intended 08M2 circuit will be a PID (or PI whatever) and not a bang-bang controller!
Anyhow I had read that they were like servos but many or most servos seem to be constant signal (PWM etc as if it's a sprung positional solenoid) whereas the few Bosch etc actuators I have seen are mere motors and gearboxes, hence only powered when a position change is required (yay!).
I'm not sure yet whether they use stepper motors or ordinary motors, nor whether the motor is a mere 2-wire bi-polar or 3 or 4 wire separate coil control for direction.
I have an old Bosch 0132800001 (6 wire) that I might strip...
Ok, I've just split the motor from the gearbox. It feels like a stepper. Dare I be so lucky that the 2 grey wires are the bipolar coil and the others (black, red, brown, white) are position sensors? No - because none are from the gearbox... oh well...
But at the wreckers I inspected an actuator similar to the Bosch pictured above. It pulled apart nicely to show circuitry and 3 terminals to the motor so that might be a better bet for me - ie, turf the circuitry and control the motor direct. Maybe other wires are (gearbox) position sensors tho they might be of limited use if my/our end positions do not align with our application. (But aligning one and counting stepper steps may suffice, otherwise external sensor(s).)
I know the above is a vague ramble, but maybe it gives some ideas or leads to feedback. Or my servo assumptions might get corrected.
Last edited by OldSpark; 01-14-2014 at 06:37 AM.
FIGJAM - I am just so clever. Ignore my reply above.
I scored yet another 3-wire headlight level adjuster yesterday (this time with a more sensical L272M chip).
As I was showering this morning (... it's almost Christmas time) and wondering if I should get more modules, it hit me. No - not the soap (which I only use every leap year Christmas) - but that I don't need the controller; only the motor & gear/servo part for the manual or PIC etc adjustment of my headlights or heating etc.
The plastic housed servos I have seen are easily separated and their PCBs merely unplug. Usually the gears and motor are independently held in place and the 12V motor has its two male terminals.
So merely connect 0V/+12V or +12V/0V for whichever desired direction...
How simple is that? (D'oh!)
BTW - my figjam is in mockery of myself. Talk about not seeing the beaver for the fur (or wood for the forest for you statesiders)! I can't believe that I didn't see this obvious solution much earlier. (But it was a background project merely in parts acquisition stage. And it probably reflects how few times I have had to think over recent years.)