[Stutchbury]

Thank you very much for your reply, Michael. My initial thoughts were to split everything after the ‘spectrum’ into two paths and run two separate sets of LEDs on the Lumazoid but thought it might be a bit too much for an UNO – hence the SPI (nee I2C) route. I could perhaps have two SPI slaves (A2 & A3), so the Lumazoid only does the sampling and FFT.
I’ll test out via a standard UNO first – I’d like to not brick the Lumazoid!

Many thanks & hope you are keeping safe.

[Stutchbury]

Looking further into I2C on UNO and at the schematic, it would seem I may have better luck with SPI over JP2? Assuming I can use A2 or A3 for SS?

[Author]

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