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Topic: Rules of thumb for un-identified LEDs? (Read 640 times) previous topic - next topic


This thread made me wonder what values of LED voltage and current one could use for an un-dentified LED found in one's parts box?

Could one use about say roughly more-or-less approximately 2.5V and 20mA?
Gone for good



scroll down, has a decent table


Thanks- I use that site quite often (and even post links here) but hadn't seen that table....
Gone for good


5 - 20ma is a good number, and Vfwd would be Vfwd at such current levels.

Typically, they are good under 100ma.


I agree with 5-20mA for most 5mm round LEDs, but I bought some high brightness 5mm whites that are 30-35mA. Then there are the" 5-chip" 10mm whites that are 100mA (20mA x 5 chips?).

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