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1st Arduino Project Answered

Hey you all,  this is my first project with an Arduino and was hoping to make a simple lamp with a few LED's - I noticed that many of them aren't bright enough to really use for that purpose.  What is the best RGB LED that you know of that satisfies:

1) Standard control (works like any other LED)
2) Very bright
3) Long Lifetime

Thanks for any help!

4 Replies

Droans (author)2013-08-17

Thanks. I've just seen some projects online where someone has an LED that is wide open and is barely casting candle power and others that will wash out the whole field of view on their camera.

I'm just not sure what wattage or amperage ranges to look for i.e., what is the brightest LED I can safely run without an external power source or are there particular pins on the Arduino UNO that are better for the continuous draw from a high current LED like this?

Or is there an LED that is so bright that it would warrant an external power source? If so I'd like to track some of those down.

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steveastrouk (author)Droans2013-08-19

The brightest LED you can run will draw no more than 20mA without an external transistor, and supply

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caitlinsdad (author)2013-08-17

http://www.adafruit.com/products/315 RGB Piranha LEDs.

Look up the CREE LEDs, the ones used in high intensity flashlights or floodlights and regular bulbs.  Those require driver circuits and heatsinks.

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mpilchfamily (author)2013-08-16

Any RGB meets those criteria. All RGB LEDs work like any regular LED. The difference is they will either have a common anode or common cathode. (i.e. a common possative lead or common negative lead which is why RGB LEDS have 4 leads.)

It depends on what you mean by Very bright? If your looking for RGBs that can provide sufficient light to match a bright flash light you may be out of luck.

All LEDs have long life of about 10000 hours or more.

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