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Old 04-17-2004, 11:10 PM   #31
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hmm, cool that would work Resistors actually are soldered to the led, so Im guessing U have 39 leds? Or is that what it can hold?
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Old 04-18-2004, 01:05 AM   #32
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Yay!!! My dad agreed that we are going to do the moonlight setup!!!! Im soo excited!!!!
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Old 04-18-2004, 01:37 AM   #33
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No the 39 ohm resistor reduces the voltage from 4.5 down to around 3.3 which is half way between the high an dlow on the led.
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Old 04-18-2004, 02:43 AM   #34
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??? So then what in the world do I do?? Im going to get 5 blue led's mA: 20 (max.), Vf: 3.7 (volts typ.), Vf: 4.5 (volts max.) and the resistors I got planned were 5 150ohm 1/2-watt, 5% tolerance carbon-film resistors. And get some speaker wire, and what transformers do I get for the set up?? Here are the sites of what I am going to get:

LED'S:http://www.radioshack.com/product.as...5Fid=276%2D316

Resistors:http://www.radioshack.com/product.as...%5Fid=271-1109
Will this work?? if not then what will?? Thanks For your help
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Old 04-18-2004, 06:26 AM   #35
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Need to know which power suppy you will get. Then I can tell you what size resistors to get.
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Old 04-18-2004, 11:26 AM   #36
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Where could I find the power supply? Does radioshcak have em? If so can u post a link and I can make a decision.
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Old 04-18-2004, 12:03 PM   #37
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I found one that would possibly work, heres the link

http://www.radioshack.com/product.as...%5Fid=273-1758
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Old 04-18-2004, 12:03 PM   #38
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http://www.radioshack.com/product.as...Fid=273%2D1757

Try that one, I had one already so I didn't know they cost that much. BTW did you get me email?
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Old 04-18-2004, 12:10 PM   #39
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Yea that would work but if you get that one you need a different resistor that what I suggested.

led is 3.7 v
poser supply is 6 volts.

6 minus 3.7 is 2.3 so we need to drop the voltage by 2.3 volts.

so you take the 2.3 volts divide by .02 for 20 ma. gives you 115, so you need a resistor with a value of 115 ohms. You can probally go 100 ohms with no problems.
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Old 04-18-2004, 12:13 PM   #40
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Dude! Just get this:

http://www.bgmicro.com/prodinfo.asp?...time_out=19:52

Its five bucks. PM me your address and ill mail you some resistors. I bought a 200pack when i orederd for 4 bucks, so i can spare some for you. Just castrate the end off this thing and use the wire thats already there. There is no need to spend more money on speaker wire.

After you snip the end off, strip about an inch of insulation off the ends. Then twist one of the resistors to the FLAT side of the LED. Now twist the ends onto the bare wire. Plug it in. If it lights, BINGO, you know which way to solder your connections. If it doesnt, no biggie, just swap the wires and plug it back in. Now strip small areas of the insulated wire, where you want the LEDs to go, and solder them in place. Make sure that you follow the same order as the first one. I'll send you some heat shrink insulation, use it on the resistors. Then use some cilicone to cover the exposed wires. Tadaaaaaa..... You now have moonlights.
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