This week, we did a few corrections and improvements on the schematics and started the the actual design of the PCBs.
We chose the plexiglass sphere for bouLED. Its internal diameter is 350mm so we took a margin and reduced the triangles’ sides to 179mm. This was enough information to place the LEDs. Having done the triangle design with OpenScad revealed helpful to check the placing as I imported a DXF version of it in Mentor’s software, as Alexis suggested. I was also happy that we chose a rather regular LED repartition, so I could use grids instead of manually copying 78 coordinates.
For the routing, however, we’ll need to know the positions of the screw holes in the PCB. Hichem is currently working on that, designing the pieces with SolidWorks. (I started doing it with FreeCAD but the SolidWorks lobby had the last word.)
This will be a 2-layer PCB, with a ground plane on the bottom. The voltage regulator will go on the back side of the PCB, with the jumpers.