Hi, I have a question about the DFROBOT - 16 bit ADC Module.
I want to connect a 0-3VDC voltage level to the A0 anologue input. I’m confused as to what pins to use, the choice is are +, - and A. Any ideas?
Hi Graeme,
Glad to see you posting again 
The positive and negative pins are for powering a sensor (e.g. a potentiometer). They are wired to Ground and VDD of the ADC board, respectively. The A row (A0-A3) is for your signal voltage (e.g. a potentiometer wiper).
In this case you should connect the ground of your 0-3V signal to a negative terminal, and your signal voltage to the A terminal. You don’t need to connect anything to the + terminal if your signal is creating its own voltage.
You can see the schematic here:
Regards,
Oliver
Support | Core Electronics
