slackjack Posted May 5, 2006 Report Share Posted May 5, 2006 Its there any way to measure current in a circuit without actually placing the ammeter in series with the component? Mayb there is another special device that does this?--thank you :) Quote Link to comment Share on other sites More sharing options...
allvol Posted May 6, 2006 Report Share Posted May 6, 2006 Hi slackjackAn alternating current can be measured without breaking the circuit by simply placing a special loop around the current-carrying line.With DC, however, I am not aware of any efficient, economical or accurate method. Quote Link to comment Share on other sites More sharing options...
ante Posted May 6, 2006 Report Share Posted May 6, 2006 Hi Jack,You can use a Magnetic field sensor or a Hall Effect sensor to measure DC current. If the current passes through a resistor or a diode or just a piece of wire you can measure the voltage drop across it to calculate the current! Quote Link to comment Share on other sites More sharing options...
slackjack Posted May 6, 2006 Author Report Share Posted May 6, 2006 Thanks for the input guys.Ante, I'm now interested in Hall-effect (or similar) sensors. Do you by any chance havethis in your collection?So Hall effect sensors work by detecting the magnectic field produced by moving electrons to somehow compute the current flow? Quote Link to comment Share on other sites More sharing options...
SM2GXN Posted May 6, 2006 Report Share Posted May 6, 2006 That was real interesting, searched on google for "Hall-Effect Sensors measure dc current" and found this:http://www.allegromicro.com/datafile/0704-015.pdf Quote Link to comment Share on other sites More sharing options...
ante Posted May 6, 2006 Report Share Posted May 6, 2006 Hi Jack,Unfortunately I don’t have the book (at least not yet) in your link. But I have another one on this subject which I think is very informative, I hope you agree Quote Link to comment Share on other sites More sharing options...
slackjack Posted May 7, 2006 Author Report Share Posted May 7, 2006 Thank you so much Ante. You're awesome. That little book is exactly the type of info I'm looking for. :) Quote Link to comment Share on other sites More sharing options...
allvol Posted May 7, 2006 Report Share Posted May 7, 2006 Good morning, Jack Quote Link to comment Share on other sites More sharing options...
ante Posted May 7, 2006 Report Share Posted May 7, 2006 Hi Guys,Here is a simple project showing one way to measure current using a Hall sensor. Even if you do not want to build one of these, you can learn from the circuit and description! ;)Current_Clamp.rar Quote Link to comment Share on other sites More sharing options...
allvol Posted May 7, 2006 Report Share Posted May 7, 2006 Very interesting, Ante. Quote Link to comment Share on other sites More sharing options...
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