Alarm LED Lights
10-30-2006, 09:53 PM
#2
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Join Date: May 2005
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1/8 inch should do it.
</sarcasm>
Assuming that your LED is 3.0V 20ma (typical blue LED), you need a 470 Ohm resistor. If you can find out exactly what your LED needs (should be on the package if you got it at radio shack/fry's) enter the numbers here to get a better figure. Err on higher resistance if you're unsure.
</sarcasm>
Assuming that your LED is 3.0V 20ma (typical blue LED), you need a 470 Ohm resistor. If you can find out exactly what your LED needs (should be on the package if you got it at radio shack/fry's) enter the numbers here to get a better figure. Err on higher resistance if you're unsure.