Midi Motion Sensors

Aim: Using the IR sensor to create a thermion like instrument



Connections:
To create the midi interface connect the Arduino to a 5pin Din plug as shown. A 220ohm resistor is needed to lower the 5V power.





Code:
From my tests I know the IR sensor reads values from approx. 0 - 600. To create the simple instrument i mapped each of these sensor readings to a MIDI note value (0-127).

The Midi Library provides a simple way to send midi signals.

void	begin (const byte inChannel=1)
	Call the begin method in the setup() function of the Arduino.
void	sendNoteOn (byte NoteNumber, byte Velocity, byte Channel)
	Send a Note On message.
void	sendNoteOff (byte NoteNumber, byte Velocity, byte Channel)
	Send a Note Off message (a real Note Off, not a Note On with null velocity)

void	sendProgramChange (byte ProgramNumber, byte Channel)
	Send a Program Change message.

Once MIDI.begin() is send the serial port is used for MIDI and cannot print message to the serial reader. Midi uses a customer Baud rate (31250).


Results: