Drive by wire, getting rid of another cable, Electronic pedal, not a wa wa |
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Drive by wire, getting rid of another cable, Electronic pedal, not a wa wa |
Gunn1 |
Nov 24 2016, 10:41 AM
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#1
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Senior Member Group: Members Posts: 1,021 Joined: 14-February 16 From: Minnesota Member No.: 19,670 Region Association: None |
Anyone have a drive by wire set up on their 914? Looking for a cable-less solution to throttle control. Would be for a stock 75' 914 2.0liter. (IMG:style_emoticons/default/driving.gif)
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stugray |
Nov 24 2016, 11:29 AM
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#2
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
This would be low complexity.
One arduino module (about $10, the size of a postage stamp) one variable resistance throttle pedal (Guido Simplex sells these) or a PWM model from modern car would work too, and one servo motor. The arduino would read the potentiometer (resistance) via an analog channel (or the PWM signal via digital channel). It would then drive one of it's outputs with another PWM signal to the servo motor. The servo motor only requires power in and the PWM signal to command a position. There would be a tiny amount of code in the arduino to "smooth" the signal but it would be trivial. You just want to find a servo that has no problem driving the throttle input |
Mueller |
Nov 24 2016, 12:43 PM
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#3
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
This would be low complexity. One arduino module (about $10, the size of a postage stamp) one variable resistance throttle pedal (Guido Simplex sells these) or a PWM model from modern car would work too, and one servo motor. The arduino would read the potentiometer (resistance) via an analog channel (or the PWM signal via digital channel). It would then drive one of it's outputs with another PWM signal to the servo motor. The servo motor only requires power in and the PWM signal to command a position. There would be a tiny amount of code in the arduino to "smooth" the signal but it would be trivial. You just want to find a servo that has no problem driving the throttle input The 2 Audi gurus that have done this conversion to their 914s would know best, but I am pretty sure the pedal has 2 pots, one +5vdc and one -5vdc or something like that, redundancy in case something goes wrong. This is one of those projects that if you cannot figure out on your own you shouldn't be doing it, other peoples lives are at stake. |
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