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What would happen if I used a 5v charger to power a 3v led? Answered

9 Replies

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janw (author)2010-06-28

It will light up shortely and then die forever.

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caarntedd (author)2010-06-01

If you don' tconnect a current limiting resistor in series with the LED, you will get smashed in the face by high pressure water. 

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AndyGadget (author)2010-05-29

What would happen if you put your face right in front of a fire-hydrant and turned it on to get a drink?  
Attach the same water supply to a drinking fountain and you'd do much better.  The drinking fountain limits the flow of water.

Put a 180R resistor in series with the LED and harmony will be restored.

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nickodemus (author)2010-05-29

When I had the bright idea to attach a 1.5v to a 9v battery (who knows why...), it lit very brightly for about a second, then it burned out.

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lemonie (author)2010-05-29

It will "burn" brightly, for a while, then it won't (at all).
Take the advice of Jack':
http://led.linear1.org/1led.wiz

L

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Jack A Lopez (author)2010-05-29

Without the use of a current limiting resistor, you will bring dishonor upon your family.

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RavingMadStudios (author)2010-05-29

The magical blue smoke will escape.

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sky0 (author)2010-05-29

It would shatter. In my workshop a 9v battery brushed against a 1.5v led and the thing exploded. Plastic shards everywhere. My recommendation: don't do it.

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steveastrouk (author)2010-05-29

Without a current limiting resistor the power supply will be damaged by the burning LED/

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