San José Semaphore – The Making of

The Semaphore is illuminated by approximately 24,000 high-power Luxeon LED emitters

The artist worked with Will Pickering of Parallel Development in Brooklyn to design custom driver and display circuits for these LEDs.

The system is controlled by an interface application written in MAX/MSP that communicates with the semaphores across a local-area network. Each semaphore disc contains a solid-state graphics processor (GPU) that renders the image of the spinning disc to the array of LEDs