Quantity   Component name
1 × 5 Inch HDMI LCD screen for Raspberry Pi 5 Inch LCD screen from Elecrow: 'Elecrow HDMI 5 Inch 800x480 Touch Screen TFT Display for Raspberry Pi'
1 × Raspberry Pi 3 A+
10 × Soft Silicone Top 6mm Push-button
1 × Arduino Pro Micro Arduino Pro Micro - 5V/16MHz
1 × TP4056 Mini-USB Li-ion charger 1A
1 × MT3608 2A Boost Converter DC-DC Adjustable Step-up Boost Converter MT3608 2A
1 × USB A to USB micro cable Short USB cable to connect the Arduino Pro to the RPi
1 × Mini Rocker switch 'Standard' miniature rocker switch. Mounting size 12 x 20 mm.
15 × Brass Knurl Round Insert Nut, M3 M3x5mm(L)-5.4mm(OD) Metric Threaded Brass Knurl Round Insert Nut
13 × M3x6 Bolt, M3 x 6 mm
2 × M3x25 Bolt, M3 x 25 mm
2 × 18650 Li-Ion Recharcheable cell 18650 Li-Ion Recharcheable cell. 3.7 V. May be protected or unprotected since the charger already has a protection circuit.
1 × Micro SD card, 8GB
1 × PCB Stripboard 8 x 6 cm will be enough to cut out the two pieces that are needed.