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Conductive soil, video projection and Makey Makey

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Description:

A demo set-up named "Groene vingers" demoing the Makey Makey board by utilising soil as a conductive material to switch between between two images. The switching and image handling is done within Isadora.  

Required components:

  • 2 trays with moist soil
  • Makey Makey board with alligator clips and aluminium foil 
  • Computer running Isadora (Isadora patch via this link)
  • A projector pointing at the table

Order from input to output:
- The 2 trays with soil form the positive and negative 'switchboard' of a circuit, which is closed when a person places both hands on it.
- The Makey Makey sensor board detects when the circuit is closed and sends for example the letter 'g' as a keyboard command.
- the 'g' key activity is detected in Isadora and used to fade between projections of photos, film and text and to start a sound.
- Using the projection mapping (a.k.a. video mapping) function in Isadora (see online tutorial), the images are projected in the correct perspective and within the frames of the trays.