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rushonerok

5A led bypass?

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I got a bunch of C9 LED's from LED Holiday Lighting. I didn't want to buy a bunch of the 5A adapters since I i figured I could cut the end off and attach a normal plug. I only have 1 string per channel so I'm not even close to pulling 5 amps anyways.

I got my first string ready and cut the end off. The string has 3 wires, I figure 2 of them are live and 1 is neutral, but which is which? They all look the same so I'm having a little trouble. Can anyone help me in figuring out how to wire up the plug (It's the male end but I don't think that makes a difference). Pic is below.

led-wires.jpg

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It looks like one of the three wires goes directly to the first bulb that you are holding. That is positive. Trace the other two and see where they go. If one leads to the end of the string then that is a neutral.

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I just unraveled it a few bulbs and there is only 1 wire that goes to the bulbs. The other 2 go to the end of the string. 1 was probably live as to continue passing a live wire in case one of the bulbs goes out. The other would be neutral. Since I am not connecting additional strings I guess wires 2 and 3 don't really matter, i could wire 2 as neutral and 3 as neutral or live if I wanted. I guess I answered my own question. Please disregard!

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If these are full-wave rectified LEDs, there was probably a rectifier in the end you cut off, and you will want to put it back on and find a different solution to your adapter problem. If they are half-wave, you may be OK. You will need to find out which of the 2 straight wires that the bulb-to-bulb wire is connected to at the far end of the string. Connect the bulb-to-bulb wire to the OTHER straight wire at the new plug.

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Read the later pages in this thread. http://forums.planetchristmas.com/showthread.php?t=24389 It will provide you with details on how to wire it up. One wire is to pass dc voltage to the LEDs in series. The other wires are to pass through line voltage to the downline strings. In your case, you just need to add a full wave bridge rectifier to the LEDs and put a resistor in line to drop the voltage not used by the number of LEDs you have. You'll need to figure out the forward voltage and desired current of the LEDs in your string. Details are in the later pages of that post.

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