Here's another fun project I've been working on while stuck indoors during a pandemic during solar minimum. The photo shows a Raspberry Pi 3B+ in an Adafruit case with a 512GB solid state USB disk. There is also a Sabrent USB audio adapter (thanks to the Julian videos) and a Longrunner HDMI touch screen ($63 on Amazon). The setup works with either the USB touch screen that's built into the display or a standard USB mouse and keyboard. I surrounded the monitor with a grounded copper shield because I did not want to destroy it with static electricity. Power is supplied to both the Pi and the display using Micro B USB wires. When running on AC, the Pi and display are powered by a pair of switch-mode supplies. Running on 13.8 VDC requires a Meanwell SD-15A-05 switching voltage converter (Jameco.com) to produce 5VDC, that goes to a dual USB type A socket and a pair of USB A to Micro B adapters. For fun, the two USB type A sockets were hack-sawed out of a dead PC motherboard, it might be cleaner to cut the adapter cords and wire them directly to the converter. On a similar note, everything could also be run on a single AC power supply. I use this for a home/auto music player, hence the need for the 512GB drive, but one could also run ham radio apps like FLDigi or QSSTV on the pi, something I intend to do. The Pi is a really fun gadget.