Posted by Texasmark1 on March 13, 2012 at 05:38:54 from (67.142.175.23):
In Reply to: Re: Diode direction? posted by 641Dave on March 12, 2012 at 06:20:32:
Word of caution. The reading depends upon the way the battery is hooked up within the meter. Some meters don't have the + side of the internal battery connected to the Red lead on the Ohms function. So don't "get your shorts in a knot (to paraphrase Dave2)" if you get conduction with the Black lead on the anode. I have had both.
Really it's a moot point. If the diode symbol isn't stamped on the side of the diode, there will be a ring on one end signifying the cathode.
A good diode will show some conduction in one direction and infinity in the other. Anything else warrants a bad diode. So pay attention to the reading, not which color lead is connected to which part of the diode. Course if you have a meter with a squeaker in it, it should only squeak in one direction.....they call the scale "Diode Check" or something to that effect.
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