On Sun, Apr 11, 2021 at 1:07 PM, Doug KM4LKC via groups.io
I'm sure Leonard will chime in. I believe this is a Power Supply (PS) for his Raspberry Pi. He is running it off of a 13.8-volt battery system to meet the needs of his radio. He needs to step the voltage down to 5.2 volts for the Rasp Pi.