The CMD is a board with a matrix of APA102 or any other SPI controllable RGB-LED. The board itself can be driven with a voltage from 3V3-5V and controlled over the APA102 driver library.
| Experience | Level |
|---|---|
| Soldering |
| Type | File | Description |
|---|---|---|
| Schematic | pdf / cadlab | Schematic files |
| Board | pdf / cadlab | Board file |
| Drill | Drill file | |
| PCB | zip / tar | KiCAD/Gerber/BoM/Drill files |
| Mechanical | zip / tar | FreeCAD/Housing and exported step/stl files |
The pcb is created with KiCAD, the housing with FreeCAD. All files are built with github actions so that they are ready for a production environment.
The circuit board is populated on both sides (Top, Bottom). The best way for soldering the SMD components is within a vapor phase soldering system and for the THT components with a standard soldering system.
The housing has a tolerance of 0.2mm on each side of the case. So the pcb should fit perfectly in the housing. The tolerance can be modified with FreeCAD in the Parameter Spreadsheet.
| Type | Link | Description |
|---|---|---|
| APA102 | RGB Full Color LED | |
| T3A33BRG | Harvatek Surface Mount PLCC IC+RGB LEDs Data Sheet |
R. GAECHTER