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Author Topic: science fair project  (Read 356 times)
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I am using electromagnets to propel a car around a track. Thinking I can use hall sensors to detect the approaching train car, I need to then send an electrical pulse to the electromagnets to push the  train. Need advice on setting up a system capable of reading input from a sensor and powering a magnet. Thanks for you help.
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I don't think you connected the grounds, Dave.
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Have you looked at any of the examples over at the Playground?
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