multi-function portable test/demo tool using an ATMega328, LCD Display, and tiny keypad
based on the PIC16F88 on the pcb, The LCD display is assumed to be a sparkfun serial LCD (or display with backpack) https://learn.sparkfun.com/tutorials/pic-based-serial-enabled-character-lcd-hookup-guide?_ga=2.65381422.1004873857.1676003667-1177551310.1675467031