Auke Touwslager & Ursula Lavrencic [NL]
Installation, 2007
 
A playful installation made from „flashing cells“, better known as fancy fashion accessories for mobile phones. Flashing cells consist of LEDs, a battery and a sensor to detect electromagnetic radiation transmitted by active mobile phones. When the sensor detects radiation of a nearby phone, it lights up the surrounding LEDs as if unveiling the phone’s invisible aura. Less sensitive cells are used to create a canvas for an inkless marker. Activated by an extremely close electromagnetic source (e.g. moving a cell-phone over the installation’s surface), temporary electromagnetic drawings can be made.
 
http://cellphonedisco.informationlab.org