After trying to solve the light issues – I’ve decided to step back and look at the situation from another angle.
I have 4 OLED screens to drive – DED, PFL, CMDS and FFI
they are all using SPI – which means I’m low on I/O pins on Uno and Micro because of the need for CS for each screen.
My light situation is somewhat limited due to the same issue – If I go via SPI, I’ll need another CS pin for every device – and I’ll need to work around my issues with multiple SPI devices.
the Other option is keep the SPI for the OLEDs and swap all the lights to use I2C I/O expenders this will pretty much allow me to wire up everything and power it all via a single Arduino Due (due to the faster CPU and no memory issues). it will also allow me to overcome the issue I had with 3.3V logic on a 5V bus I have with the Due.
