16 sparkfun rgb rotary encoder panel using single Teensy (Arduino) SPI bus

this is a panel to mount 16 RGB rotary encoders using a single SPI bus on the Teensy. The panel runs all 16 encoders providing debounce on encoders and the push switches. The panel used MCP23s17 chips to provide GPIO port expanders. The single SPI bus (so four pins on the Teensy) can control 16 times push switches, red, green and blue leds on the rotary encoder, and two colour leds on through hole mount. So, total of 128 input or output or mixed, like this is.

The board is SMD parts.

[BusyElectrons]

Very nice design. Thanks for posting the code and notes on github.

[ottermods]

That is an awesome little project board! Do you have a link to your code or schematics?

[Electromakerio]

Cool project. We would love to see you submit a write up over on Electromaker.io!

[marekhorvath]

hi. please can you share pcb design, and boom on github?