2022-04-07, 12:18 PM
Hi Onno,
My motor controller design is quite old, and I use 1.1V reference voltage for ADC.
But even in this design, the potentiometer is pulled up to 5V (and the resistors divide this to be in range).
The problem is that the rudder sensor on the PCNautic tiller is too "perfect"
, at fully extended position the resistor value is 0 ohm or 10k.
With a standard potentiometer I have here, when turned completly to the left I get some milliohms, and to the right almost but not exactly 10k.
I don't know if your your electronic design around this ADC input is the same as in Sean's controller, but with the latter, if you set the potentiometer to either 0 or full 10k, you will get 0v and 1.1v on the ADC, and this is considered as an error (rudder feedback unplugged) by the motor controller...
My motor controller design is quite old, and I use 1.1V reference voltage for ADC.
But even in this design, the potentiometer is pulled up to 5V (and the resistors divide this to be in range).
The problem is that the rudder sensor on the PCNautic tiller is too "perfect"
, at fully extended position the resistor value is 0 ohm or 10k. With a standard potentiometer I have here, when turned completly to the left I get some milliohms, and to the right almost but not exactly 10k.
I don't know if your your electronic design around this ADC input is the same as in Sean's controller, but with the latter, if you set the potentiometer to either 0 or full 10k, you will get 0v and 1.1v on the ADC, and this is considered as an error (rudder feedback unplugged) by the motor controller...