Hi,
i am attempting to replace the throttle and steering pot on a RC car remote. They are both 5k. Their neutral positions are right in the middle position at around 2.8-3k resistance. I now thought i just use a digital pot check out where this resistance range is at the digipot, initialize with it and can increase decrease to get the expected behaviour. But its not working like that. When i measure the resistance while active its similar but the car behaves completly different (and not normal throttle i could get to work but in the last 30% of the pots range and steering just works to one direction and no matter how i configure the pot it never steers the other way. Anybody any ideas where that comes from? I try to control the stock RC pcb so the only thing i did was replacing the pots.
Just curious - why?
Test the entire digital range and see if that changes anything.
Can You produce schematics for the remote part?
Ulimately to make a remote that is a combination of 2 buttons (forward/reverse) and a accelerometer for the steering. My little nephew is to young for the standard remote so i plan to make him something like a small steering wheel with 2 buttons to control the car.
Tested the complete range with no success. Unfortunately the ICs are etched so no idea what they do. One has 8 pins, the other one 16. I made a picture and some explanation for the things you can just see the solderjoints. Its a onesided PCB.
Okey, I get it.
As professional I designed "fly by wire" controls for heavy machines. We used pots but the pots were biased by resistors to both the low and the high side in order to detect broken ground or positive cables. Failsafe opration....
It's a guess that Your stuff might contain extra hardware as precausion.
I guess I'm out at this level.
Thanks for your time and information, i will keep that in mind and try to find the root cause of the problem.
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