keile Posted July 1, 2004 Report Share Posted July 1, 2004 we have a electronic design project in school and i can't think of anything that is low-cost and something unique...well, i think be able to detect a where in part of the cable is the broken wire is quite useful. Is there any way to do this? I'm thinking of using something like X-ray or maybe an ultrasonic waves to detect the broken wire.Any suggestions would be appreciated. ;) Quote Link to comment Share on other sites More sharing options...
audioguru Posted July 1, 2004 Report Share Posted July 1, 2004 Keile,Welcome to our forum.If you can make a broken wire that carries current to a load like a light bulb become intermittent by bending, pushing the break together and pulling it apart so that the light bulb flashes, then the break location can be detected with an AM radio that is tuned between stations at the low end of its frequency dial. The radio will make static noises when it is near the intermittent break. Quote Link to comment Share on other sites More sharing options...
ante Posted July 1, 2004 Report Share Posted July 1, 2004 Keile, Audioguru,How about using high voltage, then a spark will jump the break. A spark is easier to detect and no need to jerk the cable. This will of curse be lethal to any circuits connected to the cable but if you disconnect both ends before the test, why not?Ante ::) Quote Link to comment Share on other sites More sharing options...
Nettron Posted July 2, 2004 Report Share Posted July 2, 2004 If we are talking line voltages there are commercially available handheld non-contact live wire detectors you can buy cheaply, i use them often on the job.http://www.industrialnewsroom.com/fullstory/22783 Quote Link to comment Share on other sites More sharing options...
ante Posted July 2, 2004 Report Share Posted July 2, 2004 Nettron,Looks good to me!But only for AC.Ante ::) Quote Link to comment Share on other sites More sharing options...
audioguru Posted July 2, 2004 Report Share Posted July 2, 2004 Ante,Sure, just let your high-voltage arc set the insulation on fire, then your eyes and nose will detect the break! Quote Link to comment Share on other sites More sharing options...
ante Posted July 3, 2004 Report Share Posted July 3, 2004 Audioguru,High Voltage does not necessarily mean hundreds of kilovolts because that would be arson. You must think Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted July 3, 2004 Report Share Posted July 3, 2004 I just use an Ohm Meter or a Signal Generator.You could Make a Fox-Hound Circuit.Using RFhttp://www.uoguelph.ca/~antoon/circ/foxhound.htmlUsing AFhttp://www.pic101.com/foxhound Quote Link to comment Share on other sites More sharing options...
keile Posted July 6, 2004 Author Report Share Posted July 6, 2004 thanks a lot for all your suggestions! I really appreciate it :) But my instructor told me that it would be difficult... most likely my idea was rejected again :( Quote Link to comment Share on other sites More sharing options...
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