poshpol Posted March 20, 2006 Report Share Posted March 20, 2006 I've read here on these boards that the ideal brightness for LEDs in our application is around 150nm. However, the LED's i want (spectrumleds on Ebay) have the following specs:5mm Water Clear Lens4,000-6,000 mcd (luminous intensity)3.2 - 3.6 volts operating range20° viewing angleWavelength: 460-470nmAre these compatible with the DOUT board? Will I need additional resistors to use them safely (not burn them)? To lower brightness is not really a concern of mine, I like em bright! Quote Link to comment Share on other sites More sharing options...
stryd_one Posted March 20, 2006 Report Share Posted March 20, 2006 Careful with LED's... People often forget that the really bright, cool looking ones, are generally very dangerous for your eyes if you look at them for extended periods of time. You might be the coolest kid on the block with custom blue LED's, but in 20 years, you'll also have the most cataracts. Don't be a fashion victim! Quote Link to comment Share on other sites More sharing options...
poshpol Posted March 20, 2006 Author Report Share Posted March 20, 2006 haha wow i never really knew that it was that dangerous. Anyhow, the gentleman from spectrumleds has guided me in the right direction, 3mm 80-100mcd diffused LED's.thanks for your help! Quote Link to comment Share on other sites More sharing options...
NorthernLightX Posted March 20, 2006 Report Share Posted March 20, 2006 I do have the clear blue LEDs, and instead of creating a MidiBox that can light the entire room when it's on, I'm going to use bigger resistors (1K) to limit the current, so they'll be a lot easier to look at 8)Still have to expiriment with the proper resistor values though, I have a bunch of 5mm that I think are still too bright with 1K resistor in front. The 3mm ones on the other hand should be fine....I hope :) Quote Link to comment Share on other sites More sharing options...
dengel Posted April 24, 2006 Report Share Posted April 24, 2006 Here's an idea that I am sure is well known to guys who've done this for awhile, but something that you could also consider - if you have room for it, could you wire up a pot to control the voltage to the LED's? In this way, you get the ability to turn the brightness to whatever is required - from full power to low-level.If I'm wrong on this, someone smart please correct me.Don. Quote Link to comment Share on other sites More sharing options...
th0mas Posted April 24, 2006 Report Share Posted April 24, 2006 dengel: if the LED's are independent circuits of one another then you'd need seperate pots for each LED would you not? Quote Link to comment Share on other sites More sharing options...
dengel Posted April 24, 2006 Report Share Posted April 24, 2006 NOt sure there- but I don't think so. - I mean, as long as they are fed from 1 power supply, then it should be possible. I was specifically referring though to people doing the "always on" type wiring, possible from a power supply seperate from the core. Quote Link to comment Share on other sites More sharing options...
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