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MIDI & Music
MIDI and Music Information
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FOOT PEDAL TO MIDI PROGRAM CHANGE & LEDS

 

FOOT PEDAL TO MIDI PROGRAM CHANGE

This custom foot pedal design is used to change MIDI Program Change Commands (0 to 8) to control a TC Electronic G-Major 2 rack processor.

 

Also there is an output LED associated with each of the 9 Program Change commands.

 

Ideally the foot pedal should be  a linear potentiometer with a value of 10k ohms (values between 10k ohms and 1M ohm should work fine).

 

Each of the 9 Program Change numbers can be user assigned in the TC Electronic G-Major 2 to a defined function.

 

There is also a 4-way DIP switch to select on which MIDI Channel (1 to 16) the board operates.

  

The MIDI signal is also looped from the MIDI IN socket to the MIDI OUT socket so data can be looped through a number of other MIDI units.

 


 

 

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FOOT PEDAL TO MIDI PROGRAM CHANGE & LEDSx9

ITEM#: FOOTPEDMIDPRCHLEDS

PRICE:  €90.00


 

 


 

The MIDI  Program Change unit utilizes:

  • An assembled, built and tested Arduino board including a suitable pre-programmed Atmega microcontroller,
  • A 2.1mm power socket, and associated LED, 
  • A 4-way DIP switch, which selects the MIDI channel at power-on, shown in table 1
  • A 150mm wired MIDI 5-pin DIN input socket,
  • A 150mm wired MIDI 5-pin DIN output socket, 
  • A MIDI activity LED,
  • 9 off 0.1" pin-terminal Led outputs,
  • 9 off LEDs and associated series resistors,
  • The circuit schematic is available,

    

The MIDI Program Change unit requires:

  • A 9 Volt battery or equivalent 9 Volt DC power source
  • A 10k Linear potentiometer foot pedal.

 

MIDI IN/OUT Wiring:

 

 MIDI_IN_OUT_CONNECTIONS.JPG (212235 bytes)

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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.

 

  

 

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Power Supply:

The  Arduino can be powered via the USB connection or with an external power supply. The power input selection (USB/EXT.) is automatically selected.

 

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.

 


 

MIDI CHANNEL SELECTION:

 

DIP Switch Selections

MIDI 

Channel

4 3 2 1
on on on on 1
on on on off 2
on  on  off on 3
on on off off 4
on off on on 5
on off on off 6
on off off on 7
on off off off 8
off on on on 9
off on on off 10
off on  off on 11
off on off off 12
off off on on 13
off off on off 14
off off off on 15
off off off off 16

Table 1 MIDI Channel

 


 

PIN OUTPUTS FOR LEDS:

 

 DIGITAL OUTPUT  ARDUINO PIN
1 D8
2 D9
3 D10
4 D11
5 D12
6 A0(D14)
7 A1(D15)
8 A2(D16)
9 A3(D17)