MIDI Keyboard plus Arpeggiator

 

Note: I forgot to add the resistor values to the image below but you can find them in the older article here.

Features;

Pot for tempo Pot for velocity Button with 5 Arp-modes Arp stop button Keyboard Octave Buttons with responsive LED brightness Switch to chose between keyboard and ARP mode.

The ARP mode is still a bit buggy (if you hold the ARP related buttons while also holding down the notes it can glitch) but hopefully I'll get around to making it better in the future.  

Code Here

Note: to upload code to the board, you'll need the switch set to the left (aka keyboard mode)

You'll need;

17x Push buttons (push to make type)
17x 10k Ohm resistor
2x 220 Ohm resistor
1x 270 Ohm resistor
1x LED
1x Arduino Nano
1x MIDI DIN Connector
2x Pots
1x on/off switch