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Word Clock Project
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[quote][i]Originally posted by ed[/i] It's got PWM controlling brightness already, so perhaps the thing to do is use an ultrasonic sensor to detect movement and only illuminate it when someone's nearby. Could run it at 6v instead of 12v to make it more battery friendly too - the problem is that the lower power LEDs aren't really suited for backlighting so need to find something more suited than the PLCC-2 package. [/quote]
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