jonnoyeo111 Posted June 25, 2005 Posted June 25, 2005 rofl, i wanna see 20,000 LED's!!! Give me Pic!! lol Share this post Link to post Share on other sites More sharing options...
GuJuMaN89 Posted June 25, 2005 Posted June 25, 2005 so the best way is to do it in series, how would i wire it with a switch? Share this post Link to post Share on other sites More sharing options...
Fanatic Posted June 25, 2005 Posted June 25, 2005 Actually I was thinking it might be easier to wire the LEDs then plug them into a transformer. Something like a transformer for a doorbell system. Wire in a switch even a adjustable dimmer switch and there ya go. Share this post Link to post Share on other sites More sharing options...
kewlboxer2 Posted June 25, 2005 Posted June 25, 2005 i agree with Uber... There is no possible way to get 120 led's to work off of standard 120V 60HZ AC electric. Since they are diodes they only let electric flow one direction. Plus, since leds pulls different amounts of voltage ie. red pulls ~1.7, blue ~ 3.0v, the LED's will be very dim. you would need ~1.7x120, which would be ~200V, plus wire thick enough to carry the amps needed for them. Unless you haev AC LED's, you need to runthem off of DC current. Share this post Link to post Share on other sites More sharing options...
Fanatic Posted June 25, 2005 Posted June 25, 2005 Thats why I suggested the transformer. Easier and less dangerous. Share this post Link to post Share on other sites More sharing options...
DECwakeboarder Posted June 25, 2005 Posted June 25, 2005 You need more than a transformer to go from AC->DC, ask a tech teacher at school, they'll know. Tranformer will step the voltage up or down, then you need a diode square to eliminate the bottom portion of the AC spectrum and then you will have DC current. Then you need a capacitor in there to eliminate the voltage from bouncing up and down and you'll basically have made your own AC->DC PSU. Â Trust me, I did one through school like 2 months ago. Share this post Link to post Share on other sites More sharing options...
GuJuMaN89 Posted June 25, 2005 Posted June 25, 2005 meh ill just do it with the 9V battery method Share this post Link to post Share on other sites More sharing options...
bigr5026 Posted June 26, 2005 Posted June 26, 2005 imo overall, your crazy, leds burn out fast Share this post Link to post Share on other sites More sharing options...
Cbass Posted June 26, 2005 Posted June 26, 2005 no not if u run the right resistor an led can last for along time  o have built something like this in my electronics course in highschool it ran off of a 9v ac adapter to a set of resistors and a 3 way switch(on off and pulse) it was kinda cool Share this post Link to post Share on other sites More sharing options...
GuJuMaN89 Posted June 26, 2005 Posted June 26, 2005 do u remember the wiring diagrams? also how many LED's could u run on how u did it? Share this post Link to post Share on other sites More sharing options...
DECwakeboarder Posted June 26, 2005 Posted June 26, 2005 I've got the books here for building the PSU...just google like 'homemade DC PSU' and crap like that, there should be tons of information out there for you. Share this post Link to post Share on other sites More sharing options...
TheSternMystic Posted June 26, 2005 Posted June 26, 2005 A computer PSU that costs like, $30, could easily power 100+ LEDs. I mean, 12volts, means you could have about 6 LEDs in series for the voltage, then run several strings of 6 serial LEDs in Parallel. Say a PSU puts out 25AMPs on the 12Volts line. That means you could run a total of 2,500 LEDs @ 10mA, which is a very safe amperage. Easy as that. I mean, it's so easy, if you gave me the LEDs, I'd do it for you, and even solder on the Molex connector for easy connection to your PSU. Share this post Link to post Share on other sites More sharing options...
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