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Bench Talk for Design Engineers

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Bench Talk for Design Engineers | The Official Blog of Mouser Electronics


Don’t Burn Out! Calculating LED Current Limiting Resistor
On April 8, 2014 in All, Open Source by Mike Parks
Mike Parks
Light Emitting Diodes (LEDs) are one of the most fundamental output devices used in open source projects. They provide you a simple way to provide feedback to a user on the status of what’s going on in a circuit. A popular use is a power indicator to let the user know if a device is on. But connecting an LED directly to a power source can cause an LED to burn out. You have to utilize a current limiting resistor in series with the LED for protection.
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Tagged With: Joule's power law, LEDs, Resistor

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