Hi
I am working on designing an adc converter which sends the the data back via uart to the PC.
The uart to usb is a "prolific usb to uart". The ADC is configured to do an extra conversion, which is initiated by the timer (~20-200Hz).
Here is my problem: I find that when the Rx line from the uart converter in connected, the adc pin pulled up to approx 3v during the conversion (or maybe very close in time), causing wrong results on the adc.
Does this problem make any sense ?