DIY MIDI step sequencer (Arduino based)

This is the sequencer that I use to control the equipment and I love it, I want to put some Plexiglas plates and the top one smoked because the brightness of the LEDs after a while is annoying.

15 drum tracks: ER1 (only use it as a sound module), ST224 and Zynthian.
8 instruments tracks: GameBoy, Phoenix-1 (Shruthi) and Zynthian
nanoPAD2 and K2 they are MIDI controller for the zynthian.
The Microgranny played it live and only received midi clock to sync the grains.

I still need to finish a 1x5 MIDI Thru and upload a video.

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