Quantity   Component name
1 × AVR128PB28 28-pin DIL package (any AVR DB processor is fine)
6 × Momentary SPST push-buttons (Trigger buttons)
4 × SPST toggle-switches (Mode switches)
6 × Red LED, Ø 3 mm
6 × Green LED, Ø 3 mm
6 × Blue LED, 3 mm
6 × 120 Ω Resistor
6 × 4.7 kΩ Resistor
5 × 100 nF Ceramic capacitor
3 × 2.2 μF Tantalum capacitor
1 × Misc. hardware: Housing, 28 pin socket, pin headers, wires, prototyping boards...