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How does a AC & DC LED indicator work & what is their circuit design

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How does a AC & DC LED indicator work & what is their circuit design

How does a LED indicator works. What is circuit design with different voltages i.e. 24VDC, 110VDC, 110VAC, 230VAC

Is capacitor & resistor are used in all type of voltages?
asked Jun 11 by abhishek7062rediffmail-com (120 points)

1 Answer

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Just make it.  Get a ~2K resistor, a bi color 2 pin led.  Put the resistor in series with one of the led pins.  The other end of the resistor and the second led pin become your test probes.  Connect it one way it will light up in color A, reverse the polarity it will light up in color B and if it is AC it will light up in color C!  Colors A, B, C depending on the two colors of the led you get.  Total cost well under a buck.
answered Jul 14 by gilshultzhome-com (17,270 points)

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answered Dec 27, 2012 by admin (6,160 points)

1,021 questions

1,209 answers

204 comments

756 users

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