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LED Resistor Calculator

There are many sites that have simple calculators for LEDS and resistors

here is an example of one I find useful by Rob 'linear' Arnold.

http://led.linear1.org/1led.wiz

 

* This calculator rounds the resistance up to the next standard resistor value. You should actually be able to buy a 5% resistor with the value returned by the calculator.

** Power calculations assume use of the standard value current-limiting resistor shown above. Resistor power ratings are chosen based on operating within 60% of the rated value.

LED calculator version 2.0 Copyright 2001-2006, Rob 'linear' Arnold. All rights reserved.

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