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non contact electrical tester for detecting phase and null
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elec1363



Joined: 12 Sep 2009
Posts: 4
Location: Iran
Post03 Nov 2009 13:19   

non contact electrical tester for detecting phase and null
hi.
i want to make non contact electrical tester that can indicate ohase and null.
i mean if i put it near to a phase the led go on but near the null nothing happen.
anyone can help me?
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Post03 Nov 2009 13:19   

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CMOS



Joined: 06 Jan 2004
Posts: 810
Helped: 39
Location: USA
Post03 Nov 2009 21:59   

Re: non contact electrical tester for detecting phase and nu
Check this
http://www.electronicsforu.com/electronicsforu/lab/ad.asp?url=/efylinux/circuit/cir114.htm&title=Contactless%20AC%20Mains%20Voltage%20Detector
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