Posted by George Marsh on March 11, 2012 at 11:12:12 from (50.104.235.201):
In Reply to: Diode direction? posted by 641Dave on March 11, 2012 at 10:26:13:
The left side of the diode is the cathode and the right side is the anode. Electrons flow from cathode to anode, which means, the cathode will be connected to the negative side of a battery or the black wire on ohmmeter and the anode will be looking at the positive side of the battery or the red side of an ohm meter before electrons will flow. Reversing polarity and nothing will flow if the diode is good. You can confirm that with an ohmmeter. Infinate resistance when the red wire is on the cathode and the black wire is on the anode. TRY IT and you will see.
Some think the flow is reversed. And in a way, if you go with current flow theory, current flows with the arrow, electrons flow against the arrow. Hope this helps.
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