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| *their are 3 podium(to where each contestant r going to swipe his hand). *each podium has LEDs and a buzzer. *whoever swipe to the podium first will automatically enabled the LEDs and buzzer of the other contestants podium. thank you very much....i'm looking forward for your reply...it will help a lot to our requirements success... | |
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| Sounds like a school assignment. | |
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| You can use three 555 timers in bistable mode, to trigger and reset the buzzers. | |
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