Been having and issue with my FOCBOX where my adc pin is reading 1.2v and will not read any throttle inputs. I was using 5v on my throttle, but after learning the ADC input needs 3.3v, I swapped my throttle to 3.3v. The system was working fine for the last week, but I would notice that every so often the pin would read 1.2v, but now pin always fluctuates around 1.2v and does not change with applying throttle. Even with the throttle disconnected, ADC1 and 2 read nonzero values.
I continuity tested the pins and it does not seem like anything is shorting. The board has been conformal coated.
The temperature sensor seems to be unaffected, maybe the ADC is okay? I have tried putting a pulldown resistor from adc_ext to ground but that only bring ADC1 to 0 and makes it unresponsive to inputs, ADC2 remains at its non-zero voltage.
Is my ADC toast or is there a way to fix this?
https://imgur.com/a/lYzxAHy : Screenshot of problem
Edit: After taking apart my throttle, measuring the values on the hall sensor, the voltage has now returned back to normal. Could this point to a faulty throttle? I have no clue what I did that fixed the problem, im guessing when taking the throttle apart, I moved some wires around which made the sensor work again.