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A potentiometer on an LCD screen adds tactile feedback to music and video applications. Proprietary rotary sensor held on via magnet. Input via USB port. more www.girtonlabs.com Lyndsay Williams
Interfacing a potentiometer and a MAX7221 with 16 leds (LED bar/VU meter). Everything is connected to an Arduino Diecimila.
More on: http://lab.xndr.com/