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I use an Arduino Uno to control a servo to pull the clapper on a wind chime. An ultrasonic sensor detects movement. Should really use an IR sensor but it works. The servo has a separate 6 volt power supply and the Arduino is powered by wall wart. Pretty simple project. Will be using the wind chime in a future project.

<p>This may actually have some therapeutic value. Soften the actuator, randomize the events to simulate the natural air currents and I can imagine it being an attractive indoor whimsy. ☺</p>
<p>And I was paying a hundred bucks an hour for therapy.</p>

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Bio: I am an American teaching English at Shangluo University, Shaanxi. I like making machines that do interesting but fairly useless things - I call them Quixotic ... More »
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