Wind-up bird(s) is an installation of networked mechanical woodpeckers.
Each woodpecker consists of a woodblock and pushmagnet, a custom-made electronic circuit and a radio modem.
All the woodpeckers are connected together in a zigbee wireless network.
Every 5 minutes one of the woodpeckers start pecking, and the others answer.
hcgilje.wordpress.com/2008/09/04/wind-up-birds/
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