This is the KiloMux Arduino Shield repository, developed by Yaeltex in collaboration with Jorge Crowe from El Laboratorio del Juguete, both located in Buenos Aires, Argentina.

KiloMux is an Arduino UNO shield which expands the number of inputs and outputs using multiplexers and 74HC595 ICs and allows MIDI communication via USB or hardware.

It has 16 digital outputs (without PWM for the moment) and 32 inputs with the possibility to combine 16 digital and 16 analog or 32 analog or 32 digital inputs. The shield has also 4 free digital pins (2, 3, 12 and 13 in v1, and 10, 11, 12 and 13 in v2), intended to connect an ultrasonic sensor, a button and an LED for its activation.

In the repository you can find the Arduino code in charge of reading the inputs - with functions to send data using the Arduino MIDI library or via serial - and receiving data via MIDI or serial and turn on the corresponding outputs.

The code libraries necessary for the sketch functioning area also available: the MuxShield (a mod of MayhewLabs' library), MIDI (Arduino) and NewPing (for the ultrasonic sensor).

You can also find the whole HIDUINO repository - the firmware to send MIDI via USB and allow PC to recognize the Arduino as a MIDI device. In the "hiduino-master" folder you can find a tutorial on how to recompile (and rename) the firmware and load it into the Arduino device.

If you have any questions, suggestions or comments about the shield, email us at franco@yaeltex.com.ar.

Cheers!