Appendix 1—table 1. Table of electronic parts referring to Appendix 1—figure 1 including part number and cost.
| # | Electronic parts | Amount/pieces | Supplier/producer* | Part number* | Unit cost €* | Total cost €* |
|---|---|---|---|---|---|---|
| a | 4-channel relay board 5 V | 1 | sertronics | RELM-4 | 3.19 | 3.19 |
| b | 16-channel relay board 12 V | 2 | sertronics | RELM-16 | 16.72 | 33.45 |
| c | Arduino Mega 2560 microcontroller | 1 | reichelt | ARDUINO MEGA | 26.81 | 26.81 |
| d | 20 position male to female jumper wire, 20 cm length | 2 | reichelt | DEBO KABELSET | 3.24 | 6.47 |
| power supply 80W, 12 V / 6,67 A |
1 | reichelt | MW GST90A12 | 25.59 | 25.59 | |
| e | aluminium angle 20 × 20×2 mm | 20 cm | alusteck | W20202 | 1.58 | 1.58 |
| f | ON/OFF switch, 250 V / 6 A | 1 | reichelt | MAR 1821.1101 | 1.67 | 1.67 |
| g | DC barrel power connector, 2.5 mm center pole diameter |
1 | reichelt | HEBL 25 | 0.34 | 0.34 |
| h | metal spacer hexagonal, male/female M3, 10 mm | 14 | reichelt | DA 10 MM | 0.11 | 1.53 |
| i | metal spacer hexagonal, male/female M3, 25 mm | 24 | reichelt | DA 25 MM | 0.17 | 4.03 |
| j | plastic spacer, M3, 10 mm | 4 | reichelt | DK 10 MM | 0.03 | 0.12 |
| j | plastic spacer, M3, 20 mm | 2 | reichelt | DK 20 MM | 0.03 | 0.06 |
| k | screw terminal block, PCB mount, 12 pole | 6 | reichelt | RND 205–00242 | 0.83 | 4.99 |
| l | stripboard, pitch corresponding to screw terminal | 2 | reichelt | H5SR160 | 1.35 | 2.69 |
| acrylic plate, 31 × 27 cm, 10 mm thickness | 1 | Express- zuschnitt | AGS-100-TRA | 11.20 | 11.20 | |
| acrylic plate, 24 × 19 cm, 5 mm thickness | 1 | Express-zuschnitt | AGS-50-TRA | 5.97 | 5.97 | |
| hexagonal nut, M3 | 100 | reichelt | SK M3 | 0.83 | 0.83 | |
| hexagonal nut, M2 | 100 | reichelt | SK M2 | 1.81 | 1.81 | |
| bolt, M2, 20 mm | 100 | reichelt | SZK M2 × 20 | 7.90 | 7.90 | |
| bolt, M3, 10 mm | 100 | reichelt | SZK M3 × 10 | 1.60 | 1.60 | |
| bolt, M3, 25 mm | 100 | reichelt | SZK M3 × 25 | 2.27 | 2.27 | |
| bolt, M3, 35 mm | 100 | reichelt | SZK M3 × 35 | 3.78 | 3.78 | |
| plain washer, 3.2 mm | 100 | reichelt | SKU 3,2 | 0.92 | 0.92 | |
| isolated copper wire, 0.14 mm², yellow | 20 m | reichelt | LITZE GE | 1.28 | 1.28 | |
| isolated copper wire, 0.14 mm², red | 20 m | reichelt | LITZE RT | 1.28 | 1.28 | |
| isolated copper wire, 0.14 mm², black | 20 m | reichelt | LITZE SW | 1.31 | 1.31 | |
| USB-A to USB-B 2.0 cable | 5 m | reichelt | DELOCK 83896 | 3.31 | 3.31 |
*The reported part numbers and prices are from German suppliers in 2017. Equipment necessary for soldering, drilling holes and making threads are not listed.