This a parallel 4x20 Blue mode Super Twisted Nematic (STN) with built-in HD44780 equivalent controller. White LED backlight makes for white characters on blue background. It has 6 o’clock viewing.
The LCD requires 4 to 8 input lines for data and a data read/write I/O Line, a enable signal, and a instruction/data register select I/O line. This LCD is a much less expensive alternative to the serial LCDs, but requires more I/O.
The compact (0.4″ × 0.5″) D24V5F5 switching step-down (or buck) voltage regulator takes an input voltage between 7V and 36V and efficiently reduces it to 5V while allowing for a maximum output current of 500 mA.
Steel Machine Key 3/16" x 3/16", 3/4" long. These keys are economical with high strength and will fit 3/16" keyways.