Hello, I have a generic question.
I have a case in which I will be sending Serial data @9600 baud to an Arduino slave device. And that slave device is a 3vdc device The transmitting device will more than likely be a 5v device.
Is it really necessary to use a voltage converter for that? I'm thinking a resistor divider might be fine? Or even a series resistor?
I would appreciate any words of wisdom on that question?