Quantity   Component name
3 × Atmel ATMEGA 328P-AU The Arduino compatible micro will be a jelly bean addition to the BOM to allow programming with the Arduino IDE or with AVR Sudio
2 × LM2596S DC-DC converters A cheap way of getting the 15-19V input down to usable levels without breaking the bank or adding to global warming
1 × Displaytech 162B LCD Gosh darn off course we need a display
10 × Lots of LED's Because, because....it needs LED's
4 × LM7805 Power Management ICs / Linear Voltage Regulators and LDOs
1 × Raspberry PI 4 B+