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Hello SteeveTE,
Your idea of the 8 leds is marvellous, but I don't understand where you connect them. I see you mounted them in serial.
Did you add a resistor ? a transistor ?
What power supply do you use for the 8 leds (batteries or printer 3D or Raspberry Pi) ?
Do you command them by the Raspberry Pi (GPIO) ?
Thank you very much.