Build your own MIDI projects
Frequently Asked Questions.
MIDI & Music
MIDI and Music Information
MIDI Light Controller


MIDI 16-Way Light Controller

This unit utilizes MIDI Note ON/OFF data to  switch Lights ON/OFF, when combined with suitable output circuitry, in time with a MIDI music sequence.



*Click to Enlarge*


MIDI 16-Way Light Controller


PRICE:  €55.00









The MIDI 16-Way Light Controller unit utilizes:

  • An Arduino including a suitable pre-programmed Atmega microcontroller,
  • A 2.1mm power socket, and associated LED, 
  • The unit is preset to MIDI channel 16 and a MIDI Start Note of 48, (C below middle C), but these can be pre-programmed to any customer required values,   
  • A 150mm wired MIDI 5-pin DIN input socket,
  • A 150mm wired MIDI 5-pin DIN output socket,
  • The circuit schematic is available,
  • MIDI IN/OUT circuit schematic,
  • A Programme Mode LED



The MIDI 16-Way Light Controller also requires:


Circuit Schematic:

A circuit schematic of the MIDI 16-Way Light Controller unit shows the outputs.








     *Click to Enlarge*

The MIDI IN and OUT connectors use  5-Pin 180 degree DIN sockets. Note that the MIDI IN/OUT wiring is polarised and the correct pins should be used.







Output Current Drive:

You can get a maximum of 40 mA (milliamps) current from each output separately. But the maximum combined rating when several pins are active at the same time  is 200 mA for all pins. However it is probably best not to run the outputs at their maximum rating.






(1 to 16)




1 D2
2 D3
3 D4
4 D5
5 D6
6 D7
7 A0(D14)
8 A1(D15)
9 A2(D16)
10 A3(D17)
11 A4(D18)
12 A5(D19)
13 D8
14 D9
15 D10
16 D11



Normal Mode:

The unit detects the incoming MIDI data and if the MIDI channel corresponds to the correct MIDI channel setting, when a corresponding Note-on is detected, (to the pre-set note-on  data), the corresponding output is switched on (+5 Volts) and stays on until the corresponding note-off is detected and the output is switched off (0 Volts). This allows each output to operate independently. 




The MIDI 16-Way Light Controller unit can be operated live in real time from a MIDI keyboard or from a hardware/software sequencer with pre-programmed MIDI Note on/off data. The outputs can be used, via suitable interface circuitry, to switch electrical devices, such as lights, motors, pumps etc., in time with the music. Use the outputs to control and synchronize auxiliary circuitry. This provides a direct interface to the world of analogue electronics. 



MIDI Specification: 

The outputs are switched ON via MIDI 'Note-On' commands and OFF by MIDI 'Note-off' commands. These MIDI commands are all channel (1-16) dependent. Also, the outputs will switch off if  a correct MIDI Note On with a velocity of 00  is received. The unit also works in MIDI Running Status mode.



The MIDI 16-Way Light Controller units can be combined/expanded by connecting the MIDI OUT of one unit to the MIDI IN of the following unit. Thus producing 32, 48, etc. outputs.


Power Supply:

The  Arduino can be powered via the USB connection or with an external power supply. The power source is selected automatically.


External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The adapter can be connected by plugging a 2.1mm center-positive plug into the board's power jack. Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector. A low dropout regulator provides improved energy efficiency.


The board can operate on an external supply of 7 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 7 to 12 volts.