Author Topic: PCB for Switch and Controller MIDI/USB Foot Pedals  (Read 2211 times)

Offline jan1kow

  • vArranger
  • Sr. Member
  • ***
  • Posts: 321
    • View Profile
PCB for Switch and Controller MIDI/USB Foot Pedals
« on: May 12, 2011, 09:59:11 AM »
Maybe this PCB can work volume and switch foot pedals?
Think you need some basic electronic background. If anyone can understang this please reply.
jon, UK
http://tomscarff.110mb.com/foot_pedal_USB_assem/foot_switch_pedal_USB_assem.htm

Switch and Controller MIDI/USB Foot Pedals
This assembled unit converts up to 5 variable potentiometer (volume pedals) and  up to 5 switch foot-pedals (for drum fills etc. ) to an associated MIDI control signal[/b]. This unit will work with one, two or up to all 10 inputs, at the same time. This unit can work in standard MIDI mode or via the USB connection. It defaults to standard MIDI Baud rate of 31250. However a  choice is made at power-up via a switch connected to Pin 12 of the Arduino. If the switch/link is open the unit works in standard MIDI Mode and if the switch/link is closed it operates in USB Mode.

 
*Click to Enlarge*


MIDI&USB Foot Pedals

ITEM#: MIDIUSBFOOTPED

PRICE:  €45.00


--------------------------------------------------------------------------------

             
 
 
   

The Switch and Controller MIDI Foot Pedal utilizes:
An assembled Arduino Diecimilia,
An assembled  MIDI IN & OUT circuit,
5 inputs for variable potentiometer foot pedals,
5 inputs for switch type foot-pedals,
2 Male Headers x6,
1 Male Header x8,
A power-on LED,
A 4-way DIP switch which selects the MIDI channel at power-on, see Table 3
a MIDI 5-pin DIN input socket
 a MIDI 5-pin DIN output socket, 
Switch and potentiometer Circuit Schematic Diagram
MIDI IN OUT circuit schematic diagram
 

 
The Switch and Controller MIDI Foot Pedal also requires:
a 1/4 inch (6.35mm) Jack socket for each required Pedal
a 1/4 inch (6.35mm) Mono switch Foot Pedal
a 1/4 inch (6.35mm) Mono variable Foot Pedal
a 9v battery or equivalent DC power source
 

 
USB MIDI Setup:
This design  includes a USB chip, it is designed  to program the microcontroller, or provide communication via MIDI/USB.  The MIDI-USB driver information is available.

 

Power Supply:
The  Arduino/Freeduino etc. Diecimila can be powered via the USB connection or with an external power supply. The power source is selected by the PWR_SEL jumper. To power the board from the USB connection, place it on the two pins closest to the USB connector, for an external power supply, the two pins closest to the external power jack.

 

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.

 

Note that with the Arduino Duemilanove or Mega the power input selection (USB/EXT.) is automatically selected.

 

Operation:
At power-on the DIP switch positions are read and the unit will operate in a MIDI channel as shown in Table 3.

NOTE: Any unused input Analog Pins on the Arduino should be connected to Ground (GND). Otherwise the unit will produce MIDI outputs due to noise pickup on un-connected Analog inputs.

 

Circuit Schematic:
A circuit schematic and the wiring diagram of the MIDI IN and OUT circuit shows the Input/Output connections.  There is also a switch and potentiometer Circuit Schematic Diagram. The pin connections on the Arduino are also available.

       

MIDI Wiring:
The MIDI  OUT connector uses a  5-Pin 180 degree DIN sockets. Note that the MIDI IN/OUT wiring is polarised and the correct pins should be used.

 

 

 

MIDI Pedal Switch Functions:
Switch Input Selections
 MIDI Pedal Functions
 
1  Sustain
2  Sostenuto
3  Soft Pedal
4  Legato
5  Hold 2
Table 1
 

 
Sustain Pedal:
The sustain pedal is also known as the Damper Pedal. When operated it sends out a controller value of CC64. When the pedal is pressed ON the unit outputs a value of 127, when released OFF the unit outputs a value of 0. Tone-generators without the 'half-damper' implemented will interpret a value between 0 and 63 as OFF and a value of 64 to 127 as ON.

 

 

Sostenuto Pedal:
The sostenuto pedal is a type of selective sustain pedal found on acoustic grand-pianos. Pressing down the pedal, sending controller value CC66 with a value of 127, while holding notes on the keyboard will cause these notes to be sustained after you release them. Any notes played after pressing the pedal will not sustain. When the pedal is released it sends out controller value CC66 with a value of 0.

 

Soft Pedal:
The soft pedal works in two simultaneous ways. When the pedal is pressed, sending out controller value CC67 with a value of 127, the sound should be slightly softened in terms of volume and there should be a noticeable difference in the tone-colour of the sound. When the pedal is released it sends out controller value CC67 with a value of 0.

 

Legato Pedal:
When the legato pedal is pressed, sending out controller value CC68 with a value of 127, playing a different note changes the pitch of the current note without re-triggering the attack phase of the envelope of the sound. When the pedal is released it sends out controller value CC68 with a value of 0.

 

Hold 2 Pedal:
The hold 2 pedal is another type of sustaining pedal used fro sounds with two sustain phases in their envelopes. When the pedal is pressed it sends out controller value CC69 with a value of 127, when the pedal is released it sends out controller value CC69 with a value of 0.

 

 


--------------------------------------------------------------------------------

 

MIDI Pedal Controller Functions:
Controller Input Selections
 MIDI Pedal Functions
 
1  Volume
2  Modulation
3  Balance
4  Pan
5  Pitch
Table 2
 

   


--------------------------------------------------------------------------------

 

 

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 3 MIDI Channel
 


Offline Dan

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 4119
    • View Profile
Re: PCB for Switch and Controller MIDI/USB Foot Pedals
« Reply #1 on: May 12, 2011, 02:52:41 PM »
I think if you know how to soldier, you can add 5 switchs pedals and 5 volume pedals o control vArranger.

Note that the USB port will not add a standard MIDI port for vArranger. But it will add a Serial Port on the PC, and then you have to use a software from Roland, to convert your serial port to a midi port. 

I hope for you that this will not add problems.

Dan

 

advice-unchristian