Bill of Materials¶
This table is the authoritative BOM for the electronics described in the
Build Guide overview. Part numbers and
suppliers below were reconciled against the original order sheet
(hardware/bom/20170825_Bestellliste.xlsx,
supplier mostly Reichelt). Datasheets for the numbered parts live under
hardware/datasheets/.
| Component | Role | Qty | Part / supplier |
|---|---|---|---|
| Arduino Nano (ATmega328P) | Controller | 1 | Keywish Nano (original prototype used an Arduino Micro) |
| 12 V / 3 A PSU | Power | 1 | generic (Amazon) |
| DC socket (switched) | Power input | 1 | BKL 072342 |
| Toggle switch | On/off | 1 | MS-165 series |
| Membrane/vacuum pump | Inflate | 1 | AIRPO D2028B (12 V) |
| Solenoid valve | Deflate | 1 | CEME 5000EN1,5P |
| TIP120 Darlington | Pump/valve switching | 2 | STM (Reichelt) |
| 1N4004 diode | Flyback across each coil | 2 | — |
| 2.2 kΩ resistor | Transistor base | 2 | metal film (METALL 2,20K) |
| 74HC595 | Display shift register | 1 | SMD HC 595 |
| 7-seg 20 mm (common cathode) | Display digit | 1 | SC08-11 |
| Piezo buzzer | Audio | 1 | EKULIT AL-60P12 |
| Photoresistor | Card sensing | 5 | Reichelt A 905014 |
| 330 Ω resistor | Photocell divider (Fotomodul) | 5 | SMD 1206 |
| 3 mm LED | Card illumination | 5 | Reichelt LED EL 3-11250KW |
| 330 Ω resistor | LED limiting (Lichtmodul) | 5 | SMD 1206 |
| 330 Ω resistor | Segment limiting (Display) | 8 | SMD 1206 |
| Headers / stacking strips | Inter-module connectors | — | MPE-Garry / STAPELLEISTE (Reichelt) |
| Polycarbonate window | Display pane | 1 | Reely (Conrad 229802) |
| 3D-printed housing | Enclosure | 1 set | see Enclosure |