Without the keycaps all items to build the keyboard sum up to around 105 EUR / 125 USD. The aluminium plates for the Sandwich Case and of course the Cherry MX switches are the most expensive components.
- Circuit Board, 5 USD with EasyEDA
- Arduino Pro micro, 5 USD on eBay
- USB to Micro-USB cable, 2 USD on eBay
- USB to Mini-USB cable, 2 USD on eBay
- 4-pin Push Button, 1 USD at eBay
- Mini-USB port, 0.51 EUR at reichelt
- 68x Cherry MX Switches, 36.4 EUR at reichelt
- 68x 1N4148 diodes, 0.99 USD at eBay
- Cherry MX Dampeners, 0.79 USD at eBay
- Cherry Stabilizers, 5.75 USD on eBay
- Aluminium cover plate, 20.67 EUR at LTO
- Aluminium bottom plate, 16.26 EUR at LTO
- Cherry MX top removal kit 6.99 USD at Mechanical Keyboards Inc
- 10x M3 screws 6mm, 3.19 USD at eBay
- 10x M3 screws 8mm, 3.19 USD at eBay
- 10x M3 female spacers 12mm, 1.79 USD at eBay