Maxime Bodson > Junxionboard in a pencil case

Although the following is not really a Steim “project”, Robert Van Heumen encouraged me to upload a little description of my operational junxionboard. So here it is:
My interface is meant to be very portable, I choose to put its guts inside of a pencil case. back to school? not really!
If you plan to make one for yourself, any case would do great as long as it’s able to withstand the connectors, and protect the pcb card and the wires connected to it. It has to be a nice one too!

case top

My idea behind this device is that it’s more of a portable interface than a stand alone controller, for use with DIY sensors, sensors being part of an installed piece, complete systems of sensing objects…
I already use a Kenton midi controller for modulation via more classic sources such as faders and I wanted to experiment with more sophisticated sensors types. I also meant to use it with the JUNXION software, as it allows very elaborate processing of the data collected.

case int

The inputs are patched on “sub” type db-15 connectors, as the implementation of 1/4″ jacks for the inputs would imply a much larger case and I wanted the box to be as compact as possible. Also, the connectors are quite reliable (they have bolts to secure the connector) and are readily available and cheap too. A connector has 15 usable poles, which means that a single multiway cable can be connected to quite complex sensor systems..
I added just 3 separate jack inputs for the box to be used with more usual sustain and expression pedals. Also, I thought I’d need a few basic controllers at hand such as pots and switches , for testing and elaboration of patches with the JUNXION software (when I’m preparing installation work for example). that’s also the reason for the 2 pots and 3 switches on top.

case side

There’s is a nice little feature that I added too (look aside from the 0 and +5volts busses on the board): a series of dil switches giving me the possibility to ground (null) each analog input of the junxionboard. This way you can isolate the sensors completely for testing, limiting input.
This case took a little time to be constructed, the most difficult time being to get rectangle holes for the connectors (thick metal is easier to drill than thin foil!).
A little bit work, but finally a midified pencil case is so cute!
Long live (semi)diy ! thanks Steim!

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