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LEDs for netduino

Started by kap123, Jan 23 2011 03:36 AM

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#1 kap123

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Posted 23 January 2011 - 03:36 AM

Hi I'm trying to make a circuit with LEDs but I read the Technical Specifications for the netduino plus and it said that the max current is 8 mA per pin but my LEDs are 20mA. Is there another LED with less current to avoid this problem without other power sources? Do I have to use an LED driver to make this work? If so which one?

#2 bill.french

Advanced Member

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LocationPrinceton, NJ

Posted 23 January 2011 - 02:39 PM

You can use a plain old NPN transistor, which is fun to use if you want to learn about transistors, anyway. I've used various leds with 220ohm resistors on various ports without and problem so far for testing, but your mileage may vary! I'd like to find a source for leds with resistors built in.