PCB newcast

This week, as well as the previous ones for most of us, was devoted to PCB design. During this work, several changes were made to our design. Here is a summary and some details. The overall structure remains the same as what Marc described in this post. Let’s go through the modifications for the 5 PCBs.

Main board

We have made many modifications to this PCB.

  • First concerning the Wifi module : we wanted to use the AMW006 module because the OS seemed convenient and it is supposed to have less bugs than the ESP32. But we discovered that the compilation chain has to be used in windows, so we decided to use the ESP32 instead (the DevkitC so as to flash easily).
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The PCB puzzle

We made a few major modifications in our design : it turns out flex PCBs aren’t possible. Even though everything isn’t quite decided yet, here is a summary to clarify the situation. I will keep you updated of any major modification 🙂

General design

A Phyllo is composed of three parts:

  • a fixed base,
  • a rotating half sphere placed on this fixed base serving as support for the lighting of the sculpture,
  • a hull made of petals that covers this sphere.

A Phyllo has 78 petals that can be illuminated individually (8 spirals with 6 petals lit by spiral arms, or 13 spirals in the other direction).… Read more

About LEDs

First ideas

Our original idea was to place LEDs on the inner sphere of the sculpture, either with flex PCB, or by drilling the sphere, placing the LED in the holes and connecting them with wires to a rotating PCB contained into the sphere. To facilitate the positioning of the LEDs, we could have modified the design so that we can pin the petals one by one on the inner sphere rather than print everything in one block.

But these designs are not easily achievable. First, Alexis does not know how to design flex PCBs. Second, to have a satisfactory visual impression, we would like to have at least 100 petals.… Read more