Hello. We need a circuit board with these requirements. Needs to just regulate the voltage. Input is 12 volts, output needs to be variable from 4 or so volts. Could be six, or five. And need to adjust up to the full twelve volts or very close. Must have digital voltage display with ten turn potentiometer. 2 amp rated at least. We don’t want to deal with China, but ok the part is sourced from there. Would you have this piece?
Straight buck board with display will not work. Too much voltage loss.
Unfortunately none of the regulators we carry have an LCD
robotshop.com/en/power-regulators.html
We do offer quite a few which accept 12V and output 4-6 (variable) at 2A+.