arduino based MPC like midi controller

Description

I didn't want to spend 100$ on AKAI MPD. I thought I can make one myself.
So i bought a bunch of buttons, two 74151 multiplexers, an Arduino Uno and went to work.
The program is very simple. It scans through all buttons (two buttons at time thanks to two multiplexeres), debounces buttons if needed and sends midi command through serial port (source code in links).
On the other side of serial is PC with Hearless Serial to Midi software. This magnificent program converts serial input into midi commands. Then it can be used in all sorts of programs like FL Studio or ableton.
If I ever make second version of it I will
1. use better (connected with each other) cables
2. use shift registers to read all buttons state at once.
3. use better (more silent) buttons

Still it works like a charm and I'm left with 100$ in my pocket :)

Components

1 × arduino uno

2 × 74151 multiplexers

16 × pushbuttons

Project Logs

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I've made an app for that
bochen • 12/05/2015 at 18:58 • 0 comments

I've made Android app that let's me play without a hassle of connecting to pc.
Here is a link to it: (ITS FREEEEEE):
https://play.google.com/store/apps/details?id=pl.orendi.bit.
midi-to-usb cable
bochen • 11/01/2015 at 08:37 • 0 comments

I've bought this little midi - to - ubs cable so I will not have to do the serial-to-usb software mumbo-jumbo every time.
The istructions I will follow are here: http://shiftmore.blogspot.co.uk/2010/01/quick-and-dirty-arduino-midi-over-usb.html
video added
bochen • 04/16/2015 at 18:28 • 0 comments

Video with working stuff added:

View all 3 project logs

Discussions

Arturo wrote 06/09/2015 at 08:16

you have the wiring diagram? your project is amazing!

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bochen wrote 06/09/2015 at 08:34

Hey, I don't have a diagram. I based on this: http://www.codetinkerhack.com/2012/11/how-to-turn-piano-toy-into-midi.html?m=1#more but this uses shift registers and I've used multiplexers but the idea is similar.

Hanging pin on multiplexer is always 1 (if you use TTL multiplexer at least like 74151). I used this idea and connected buttons to ground and the other side of the buttons to multiplexer IN pins. so when button is pressed multiplexer reads 0. So the logic is turned around there.

Than it is normal multiplexer scanning (going through all the addresses of multiplexer and reading all the inputs on the OUT pin of multiplexer).

hope that helps.
br

Pawel

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Arturo wrote 06/09/2015 at 08:06

Thanks!

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Arturo wrote 06/09/2015 at 07:45

you have sketch? please!

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[deleted]

[this comment has been deleted]

bochen wrote 06/09/2015 at 07:48

Hey, yes it's here: https://gist.github.com/pbochenski/6a77521e7cebe0baaa9f

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davedarko wrote 03/31/2015 at 21:37

it's settled. I'll order some of those buttons! Any demo videos?

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bochen wrote 04/01/2015 at 06:02

yes do it. It's super easy and fun. I don't have any videos now but I can make one.

br!

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arduino based MPC like midi controller

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I've made an app for that

midi-to-usb cable

video added

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