JP Gleyzes| Quantity | Component name | |
| 1 | × | Wemos lolin 32 lite ESP32 breadboard |
| 1 | × | 5v 4 channels relay module with optocoupler |
Retrofitting an old laser engraver
An attempt to revive an almost dead Trotec laser engraver
An attempt to revive an almost dead Trotec laser engraver
| Quantity | Component name | |
| 1 | × | Wemos lolin 32 lite ESP32 breadboard |
| 1 | × | 5v 4 channels relay module with optocoupler |