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My first ever instructable on this website was a 4x4x4 LED Cube using glass PCBs. Normally, I do not like to do the same project twice but recently I came across this video of french maker Heliox which inspired me to make a bigger version of my original cube. In her video Heliox comes up with a much simpler process to manufacture glass PCBs that does not involve etching but instead she uses a plotter to cut the traces from a self-adhesive copper foil which is then transferred to a glass substrate. Since plotters are not that expensive and could also come in handy for other projects I just got one to try the process for myself.
Apart from being a bigger version of my original cube this version also uses a custom PCB based on a SAMD21 microcontroller and a housing made from lasercut acrylic. The cube can be programmed with the Arduino IDE and is also compatible with CircuitPython.
64 pcs - WS2812B 5050 SMD LEDs (e.g. aliexpress)
4 pcs - 100 x 100 x 2 mm glass plate (I found this really cheap German supplier which only charges 0.20 EUR/pc)
2 pcs - A4 sheets of self-adhesive copper foil (e.g. amazon)
1 roll - plotter transfer paper (e.g. amazon)
1 set - lasercut acrylic (see below)
1 custom PCB (see below)
4 pcs M2x8 screws + nuts

The total costs of all materials including the lasercut service and PCB manufacturing is about 100 EUR.

Silhouette Portrait 2 plotter (e.g. amazon)
laser cutter or online lasercut service (I am using
soldering iron
heat plate or reflow oven for SMD soldering (or advanced hand soldering skills”

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