solar sound

At last weekends’ TIK festival I did the solarsoundmodule workshop. One of the most inspiring things in years for me. The little ‘creatures‘ create a minimal sound through a simple circuit using only solar power.  It combines a couple of things that I’m very interested in at the moment:

  • Low energy use: a little solar panel powers the circuit. The light variability influences the sound it makes
  • Soft sounds: I’ve been thinking for some time about a way to create whispering sounds to reinforce silence. The piezo speakers give off a very pure, crisp sound.
  • A workshop format: doing workshops is a way I would like to earn some money. The easy technical way they set up this workshop is very inspiring.

This is my sound creature with the circuit drawing:

 

breath sensor progress

During the TIK launch event I was fortunate to meet Christian Pointer. He’s an electronic engineer, programmer and hacker from Graz, Austria. He was very kind to help me with improving the stretch sensor. With the few parts I had with me he managed to increase the output range from the sensor to the Arduino dramaticly. Making it much easier for me to work the data and use it in different applications. The only thing I have to do is replace the two pot meters with ones’ of more suitable value and replace the simple opamp with a rail2rail one (TLV274 for example).

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