Help Running moonlights on batteries.

I agree,
I question the running them on batteries, Your going spend a lot more money on batteries in the long run.

and running them parallel would be a better option that way you wont get the voltage drop
 
Really? I was told it would cost alot to get a plug that would work for these... If you think i should i can try doing a plug. What would you recommend?
 
If you run it in parallel then you only need a 4.5 VDC power adapter.

If you run it in series than you multiply 4.5 by how many LED's you’re going to use. So if you have 4 than you want an 18 VDC adapter.

You can pick one up at radio shack.
 
Ok i'ma try and head to one tomorrow. But i guess i need to know a few things...
How many amps do i need?
What type of adapter?
anything else i should know before picking one out?
 
did you check out the link, it explains everything and gives you estimates for current and voltage on various bulbs.
 
I think that calculator requires information that you don't have. You don't need that to get your LEDs working. I have about 20 LEDs on a 500ma converter. Just get as much amperage as you can find. ;)
 
Ok cool it looks like the local radio shack has that instock. So i just have to cut the tip off then wire it to the wires conecting to the leds?
 
<a href=showthread.php?s=&postid=14307890#post14307890 target=_blank>Originally posted</a> by saltwater4life1
Ok cool it looks like the local radio shack has that instock. So i just have to cut the tip off then wire it to the wires conecting to the leds?
Click to expand...

Since you will already be at RadioShack, check to see if they have the mating connector rather than cutting the adapter. Makes it easier to disconnect later.

Todd
 
Yep. That way you don't have to splice the wires on the new adapter. It makes for easy removal if you need to. It also defines the workmanship. Keeps it looking clean.
 
That adapter doesn't have much amperage, so it may not power too many lights. Without knowing the amp requirements of your LEDs it might be too small. :(
 
<a href=showthread.php?s=&postid=14309153#post14309153 target=_blank>Originally posted</a> by saltwater4life1
hmm but there is no way to figure out the amps is there?
Click to expand...
Not that i know of. That adapter may work, but I would look for something with as many amps as you can find and afford. You can't go too big. If you can buy it and try it out and still be able to return it if it doesn't work then go for it. ;)
 
If you knew the wattage of the LED then you can divide that by the voltage and that will give you the amperage you need. But if you don't have that then you just have to experiment.

Example: Because you’re running parallel then you have to multiply watts per LED. So 4 LED's that are .2 watts then the total will be .8 watts... (if they were series then you would multiply the voltage) divide .8(W) by 4.5(V)= .17777 amps (series multiply .2(W) by 18(V)= .0111amps)

And again I don’t know what the wattage is on your LED’s .2 is just an example. But you can see how when running in parallel you need more amps and less voltage as opposed to series it’s the opposite.

Hopefully this helps you….
 
I think the calculation is called ohms law or ohms theory something like that....I= VxR... If you have 2 you can figure out the 3rd.
 
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