The ubiquitous LCD (and VFD) modules based on the HD44780 controller IC can require up to 12 lines from the host. This hardware interface Design Idea reduces the connection to just one wire, allowing ...

A PCB etched to mate with a USB C cable eliminates the need for a connector. [CNLohr] then gave the board a three-digit 7-segment LCD display from Aliexpress, which can be had for around 21 cents ...