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Old 30th October 2006, 05:35 AM   #1
Question Help with night light system

I have designed a basic night light system (attatched) whereby a light comes on when it is dark. Does anyone know of a way in which I could get the light to stay on for a pre-determined time once it is dark (15 minutes)?
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ZackSmith is offline  
Old 30th October 2006, 09:38 AM   #2
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Do a google for "555 tutorial"
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Nigel Goodwin is offline  
Old 25th September 2008, 06:14 PM   #3
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I would llike to built a LED bulb using 230v AC. I request to submit me a circuit

Last edited by ranganathan; 25th September 2008 at 06:15 PM.
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Old 25th September 2008, 09:36 PM   #4
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http://www.rapidonline.com/Electroni...tor-230V/81594
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Old 25th September 2008, 11:24 PM   #5
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Quote:
Originally Posted by Nigel Goodwin View Post
Do a google for "555 tutorial"
You can also make a timer out of unused CMOS gates with Rs and Cs.
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