Its designer and creator explains more : It uses an Arduino Mega board and a 3.2” TFT touch screen with a suitable shield for connecting the screen with the Arduino Board.

Using a USB-C phone with Power Delivery is ideal here, as it allows the phone to be powered while also communicating with the Arduino over USB. The RemoteXY app is built specifically for this purpose.

Well, [shabaz] had a great idea: use it as a star map display. The project combines the Arduino, a round TFT, a GPS receiver, and some external flash memory to store data.