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Luminousity of standard RED LED

adrian.wong

Dec 28, 2015
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Dec 28, 2015
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I'm a newbie in electronics and I would like to what is the luminosity of standard RED led. Kindly reply asap. thanks!
 

Alec_t

Jul 7, 2015
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Welcome to EP!
Google should have the answer, but first you need to decide what is a 'standard' red LED. Different manufacturers have different ideas! LEDs even from the same batch will have different, current-dependent luminosities.
 

adrian.wong

Dec 28, 2015
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Dec 28, 2015
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Hi Alex, I just bought an LED from an electronic shop so I have no idea about manufacturer and they told me this is the standard red led. The glass is in red colour.
 

hevans1944

Hop - AC8NS
Jun 21, 2012
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Do you even know what the definition of luminosity is? Or how to measure it? Usually we talk about LED brightness instead of luminosity. There is no such thing as a "standard" LED. What you have could be a considered a "typical" LED though. You can power that puppy up with a five or six or even nine volts DC from either a battery of a "wall wart" supply, and probably with a 1.2 to 1.5 V dry cell as well, if you place an appropriate resistor in series with it to limit the LED current to a "safe" level that won't destroy the LED. Try starting out with a 1000 ohm, 1/2 watt, resistor and working your way downward in resistance from there. Stop when you reach the desired "luiminosiity" or until the LED burns out.

It would be a really good idea to peruse the nifty "how to" resource section we have here: https://www.electronicspoint.com/threads/got-a-question-about-driving-leds.256849/

Oh, and welcome to Electronics Point, Adrian Wong!
 
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