A business-card-sized LCD hooks up via USB and shows your ... There’s a 3.3 V regulator and a handful of small components on the board. There are two USB-C ports and a connector to hook up ...

The circuit consists of a PIC18F2550 with a 20Mhz resonator and the required components for the LCD screen and the USB. The display is connected to the controller board using single strand wire. In ...