Accéder au contenu principal

MERIS MIDI box, DIY version


MERIS produces incredible pedals for guitars (but not only). They really sound great. In my opinion, they are the holy grail of any sound seeker/modeler. I am a very happy owner of their guitar synth pedal named ENZO.

I really wanted to control my Enzo pedal using my main MIDI controller : the Behringer FCB1010. For this, I needed a MIDI Box to convert a 5-pin MIDI plug into a MIDI jack. Indeed, all Meris pedals are equipped with a TRS jack to use either a MIDI box or an expression pedal.

On their online shop, Meris are selling their MIDI I/O 89$ : way too much in my humble opinion... I decided to create my own DIY MIDI box.

First of all, here is how the MIDI jack is used by any Meris pedal:

Based on this, I created a MIDI interface with diagrams found on the Internet. Three main parts:
  1. The voltage regulator based on LM7805
  2. The MIDI in buffered by an optocoupler 6N138
  3. The MIDI out


To make things faster (and better done...), I purchased a MIDI shield for Arduino plates where the MIDI in and out are already done. It costs around 3$ on every online store. Only the voltage regulator is missing.


Adding a aluminium housing, all parts cost less than 12$. It was worth the try ! And moreover it works well !
Here is a picture of the final result


Now that I can control my Enzo pedal over MIDI, here is the MIDI CC table used by Meris :

LET'S PLAY !


Commentaires

  1. Hi. Do you have some picture of your interface? I can read some schematics but I don't understand if your can connect multiple pedals

    RépondreSupprimer
    Réponses
    1. Hi,
      Thank you for your comment.
      Unfortunately, the interface is now in its box and fully integrated in my rack. I don't have any picture of it.
      I relied on the MIDI shield for Arduino to make it work.
      As I only possess one MERIS pedal, I didn't explore the possibility to control multiple pedals. I guess it might be possible but it will require to send messages over multiple MIDI channels.
      Good luck for your project - JC

      Supprimer
    2. Hi, I have updated my article with a recent picture of the circuit that I made. As you can see, very simple.
      The 9V power supply goes into a 5V voltage regulator (with some capacitors, as adviced), which powers the MIDI shield plate for Arduino.

      I followed the line to solder the TRS jack to ground-MIDI out - MIDI in.

      I just had to be careful as I use an aluminium case : this can cause shortcuts. I glued some paper on the case to avoid that.
      I hope this helps - JC

      Supprimer

Enregistrer un commentaire