infrared musical instrument

A cool project for all those into the electro music. Here is something that even Jean Michel Jarre would want… an infrared Theremin-like musical instrument! Notes are vibrating from speakers just by moving your hands in thin air. One hand controls the note played and the other hand controls the octave. The difference is that the sensors are not antennas but two IR devices from Sharp, the GP2D120.

Notes are predefined, so unlike a Theremin, it’s pretty easy to play it. The instrument, named Squaremin, can only produce flat notes from the C major scale, so only C,D,E,F,G,A,B within 7 octaves. However you can change these notes to your desired scale, all you need to do is to define new notes by changing the period of the pulse in the source code. The microcontroller used is the ATmega168.

The operation of the instrument is given by the two IR sensors. These sensors can determine how close an object is to them by using triangulation. A pulse of IR light is emitted and if an object is in the way it reflects the light back to the sensor. A CCD array within the sensor receives the reflected light and determines the angle of this reflection. If the angle is wide it means the object is far and if the angle is narrow it means the object is close.

Therefore depending on the distance your hand is from the sensors, you change the notes and the octaves. The Squaremin has an internal audio amplifier with a small speaker but you can easily add a line out connector so you can hook the instrument to a mixer for example. Also it provides a little light show as it changes color with every note you play, again reminding of the awesome J.M. Jarre concerts.

All in all, although the spectral composition of each note is not that rich, this principle can be applied into a real instrument project that instead of microcontroller generated sounds plays real samples.

Infrared Theremin Musical Instrument: [Link][Via]

40 Minutes Of Low-Fi 1-Bit Electronic Music

An electronic circuit is assembled inside a CD case with a headphone jack on the side. The device plays back 40 minutes of low-fi 1-bit electronic music—the lowest possible digital representation of audio. The device is available for $25 and it’s sold as a form of art.

40 Minutes Of Low-Fi 1-Bit Electronic Music: [Link]

March 1st, 2008

Music Blinking LED’s

Yeah you know what im talking about, you’re listening to your favorite tunes, and you would like some light to blink on the rhythm, i mean who doesn’t ? 🙂 We’ve all been trough this phase. So what can you do ? well the solution its pretty simple you solder a transistor together with a switch, some LED’s and a stereo jack connector and its done. Yeah its for beginners. Here is the parts list:

  • 4 LEDs (any collor)
  • P2 plug
  • 2 position switch
  • TIP31 component
  • Box to put all the stuff (if you want)
  • Soldering iron and accessories
  • Cable

Here is the schematic:

Music Blinking LED’s schematic

And here is the circuit in action:
You need to a flashplayer enabled browser to view this YouTube video

Music Blinking LED’s :

if you feel like you need additional info check the author’s page


© 2007-2011 YourITronics | Any logo, trademark and project represented here are property of their respective owners | Wordpress | Privacy Policy    RSS