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Green Led voltage? Answered

I picked up some green leds at a surplus store today. I've been assuming that they run on 1.7 volts, is this about right?

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cc67
cc67

9 years ago

I suggest it is better if you buy newer models because it has lower voltage drop. Some green led's may be 30mA, some are 20mA but the minimum voltage is 2.1V so gyromild is correct about 2.2V

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gyromild
gyromild

13 years ago

No, a green LED normally has a forward voltage of between 3.0-3.8 volts. To be precise, you might want to use a multimeter.

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guyfrom7up
guyfrom7up

Reply 13 years ago

nononono, green LED's are generally 2.1 volts, if you want to test it's voltage though some green LED's can be all the way up to 3.1 volts. Whenever ur testing with a ptentiometer when it gets brighter and brighter and then all of aa sudden really bright then you know that your going over the rated voltage/current.

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gyromild
gyromild

Reply 13 years ago

My bad :(
Red= around 1.7v
Green= around 2.2v
Thanks guyfrom7up.

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cc67
cc67

Reply 9 years ago

yeah... guy from 7up is right. Green Led's are 2.1V 20mA. Here is a source
http://www.kpsec.freeuk.com/components/led.htm

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tech-king
tech-king

13 years ago

most leds (normal, not ultra bright) use about 2 volts and 20 milliamps.