| What | Exact Part | cost full |
cost low budget |
source/link |
|---|---|---|---|---|
| uC | ESP32S | $7.49 | $7.49 | seedstudio |
| battery | LiPo 3.7V 650mAH | 2.60€ | - | ALioExpress |
| switch | ||||
| 3D mag sensors | QMC5883L (alias HMC) | AliExpress | ||
| magnets | ||||
| buttons | 2x | 0.50€ | 0.50€ | ALiExpress |
| springs | 25x6 (3x) | 2,40€ | 2,40€ | AliExpress |
| cables | - | $ | $ | depends on your patience |
| 3D housing | - | $ | $ | depends on your patience |
| shipping | - | $ | $ | depends on your patience |
| working hours | 1000h+ | 0 | 0 | good that thigs is free ! |
| sum | - | <20€ | <15€ | - |