Friday, 8 December 2017

FADR-8 Midi Fader Box - with JLCPCB

JLCPCB is a great place to get custom Printed Circuit Boards. Be sure to take advantage of their incredible 10 Boards for $2 prototyping deal! Visit JLCPCB.com

The company contacted me with an interesting idea for a collaboration video. They asked me to come up with a project and they would provide the PCB's. I have always wanted to build a Midi Fader box with some high quality - full size faders. So I created the FADR-8.


I decided to use a Teensy LC microcontroller as the brains of the unit since it handles USB Midi very well. I also went with a three digit LED display for that retro vibe. Finally, I added two buttons that allow for setting the values of the faders and switching between eight banks of presets. To top it off, I made some custom 3D printed fader knobs.

The project uses ALPS RS6011SP6003 faders and a Hammond 1590DDBK box for the enclosure. To drive the LED display I used a MAX7219 chip I had in stock and a 74AHCT125 level converter chip to make it play nicely with the 3.3v Teensy board.

Working with faders is much more challenging that working with potentiometers. Instead of a simple drill hole, faders require a accurately cut slot in the enclosure. For this you will need a milling machine. I would hate to try this with hand tools.

Overall this was a very satisfying project. The PCB's from JLCPCB were perfect and everything fit together nicely. Watch the video below to see how everything came together.

2 comments:

  1. Hi this is a very good project for home DAW setup & other,
    I want to make the project, plese help me sir............
    How to get FADR-8 gerber file for order to JLC,
    How to get arduino code of that project

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  2. Dave, hope you are well, this piece is very nice! As soon as you can let us know how we can rock one!

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