Quantity   Component name
1 × Recycled calculator VFD display
1 × ATmega328P Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
1 × HV5812 high-voltage shift register
1 × 32.768 kHz watch crystal
1 × Single AA NiMH cell
1 × LM2576-ADJ buck converter
1 × Original-style VFD high-voltage / filament converter
1 × ZTX851 transistor
1 × BC547 transistors
2 × 1N5819 Schottky diodes
1 × LDR for automatic brightness control
1 × WS2812 / SK6812 RGB LEDs
1 × COB LED filament status indicators
1 × Piezo buzzer
3 × Push buttons
2 × Universal prototype PCB
2 × Copper pipe elbows
1 × Brass standoffs