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Topic: Rules of thumb for un-identified LEDs? (Read 577 times) previous topic - next topic

JimboZA

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?
My hovercraft is full of eels.

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.

Osgeld

http://www.kpsec.freeuk.com/components/led.htm

scroll down, has a decent table
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

JimboZA

Thanks- I use that site quite often (and even post links here) but hadn't seen that table....
My hovercraft is full of eels.

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.

dhenry

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

Typically, they are good under 100ma.

rickso234

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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