I have a BV502 it is working 100% ok if I supply 5V+ from the Usb to serial interface to the pin next to tx on the BV502. However if I disconnect this supply and supply 5V from an external supply to the +ve pin on top row thalthough the board led is lit but I cannot communicate with the 502 from the computer ( no yellow writting at all )!! There is continutity between the the V+ pins and andby bazwilson1 - BV500
on the BV502 can I set an external referace voltage for the ADC or do I have to use the fixed votage, and if so what is that fixed voltage?? Thanksby bazwilson1 - BV500