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Author Topic: sence current  (Read 799 times)
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Hi
I would like to sence the presence of current without measuring the actual value of it...I am looking for a low cost way to know whether current flows in my circuit when a relay is closed...Is there a low cost way to do it non invasively?

Harry
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a hall effect current sensor would work, they sell models that clamp over the power wire without tapping into it. it would tell you how much current is flowing also.
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The problem with a hall sensor is that the current hast to be quite high before it will sense it.
You do not say how much current is flowing so we don't know if a hall sensor is appropriate.
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Thank you for your replies...
I want to sense the presence of the current that lights an ordinary 220V AC lamp...
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Then take a look at these:-
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=retrieveTfg&binCount=54&Nty=1&Ntx=mode%2bmatchallpartial&Ntk=I18NAll&Ne=4294957561&Nr=AND%28avl%3auk%2csearchDiscon_uk%3aN%29&N=4294954024&Ntt=current+sensor
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