Looking for a LED DIY ? - The Planted Tank Forum
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post #1 of 26 (permalink) Old 01-11-2008, 10:09 PM Thread Starter
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Looking for a LED DIY ?

Hi

I am completely new to LED light, so please pardon any mistake.
Let say i want to intergrate a LED system that use the household power supply into my tank hood ( DIY 29 G, already have AH light fixture ). Where should i start now ? Anyone can recommned good part for this project. Again, i have no idea what to get.

Thank you,
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post #2 of 26 (permalink) Old 01-11-2008, 10:18 PM
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Not sure what you mean by "LED system that use the household power supply".

Am I assuming correct that this is for a moonlight?


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post #3 of 26 (permalink) Old 01-12-2008, 12:49 AM
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I got mine at my local advanced auto parts. I bought a 12 inch blue LED strip. It's for a ciggarette lighter, but I actualy cut the wires, and hooked it up to a 12 volt plug. Wired it up, and it works great.
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post #4 of 26 (permalink) Old 01-12-2008, 02:15 AM Thread Starter
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i am not so familiar with the LED itself. I want to set up a light that is use only at night to not disturb the fish. It has many color light red, blue .. I hope you can understand what system i am talking about.
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post #5 of 26 (permalink) Old 01-12-2008, 02:22 AM
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Quote:
Originally Posted by nickboudin View Post
I got mine at my local advanced auto parts. I bought a 12 inch blue LED strip. It's for a ciggarette lighter, but I actualy cut the wires, and hooked it up to a 12 volt plug. Wired it up, and it works great.
Your house runs on 12V? You must have some very dim lighting.

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post #6 of 26 (permalink) Old 01-12-2008, 02:44 AM
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I'm sure they mean a 12v to 120v transformer . Actually, low voltage lighting isn't that uncommon. It's not that it's dim, it just uses more amperage

Stagius: How DIY savvy are you? Could you buy all of the individual parts and solder, wire, and install them yourself. Or are you wanting a pre-made system on the cheap?

Thanks,
AndrewH


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post #7 of 26 (permalink) Old 01-12-2008, 02:53 AM
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I know not that much about LED but still set up a moonlight system for my tank. Got all the parts and assembled them.

See my signature for DIY Moonlighting.

For led, since they run on very low voltage, you can't just plug directly to household sockets, which run on about 120v. You need a transformer/adapter/resistor in between.

Edit: It costs about $10, excluding soldering gun.
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post #8 of 26 (permalink) Old 01-12-2008, 03:56 AM Thread Starter
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@AndrewH: I am not expert DIYer by any means. I prefer to have a simple kit, with all the part so that i can integrate into the hood by myself. However, if you can provide me a full list of part, I think i can get something to work

@dekstr: Great article ! I will definitely give it a try
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post #9 of 26 (permalink) Old 01-12-2008, 04:24 AM
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Quote:
Originally Posted by AndrewH View Post
I'm sure they mean a 12v to 120v transformer . Actually, low voltage lighting isn't that uncommon. It's not that it's dim, it just uses more amperage

Stagius: How DIY savvy are you? Could you buy all of the individual parts and solder, wire, and install them yourself. Or are you wanting a pre-made system on the cheap?
I think you mean 120 volts to 12 volts...
Starting with 12 volts from the mains is a bit... low.

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post #10 of 26 (permalink) Old 01-12-2008, 04:56 AM Thread Starter
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Dear LED expert! is there any kind of LED that are able to be submerge. I would prefer to have them underwater.
Alternatively, I was just thinking about putting a range of LED into a clear tube that completely seal at both end. THe idea come from this link, http://cgi.ebay.com/Wide-15-blue-LED...QQcmdZViewItem.

I want to make something similar to this, but much cheaper. Is it possible ? Still have no idea how to water-proof sealing though.
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post #11 of 26 (permalink) Old 01-12-2008, 07:24 AM Thread Starter
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http://www.besthongkong.com/product_...roducts_id=178

Just got this link. If i get this right, this product can submerge in water. They don't need a resistance, do they ?

The price is pretty reasonable though. In case I can't do a DIY LED, i gonna buy from this site.
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post #12 of 26 (permalink) Old 01-12-2008, 09:50 AM
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http://www.besthongkong.com/product_...roducts_id=178

Just got this link. If i get this right, this product can submerge in water. They don't need a resistance, do they ?

The price is pretty reasonable though. In case I can't do a DIY LED, i gonna buy from this site.
hey stagius that's a pretty good idea from the site, waterproof led strip light. It might be a little too powerful for night-time though.

Who's the DIY LED expert?
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post #13 of 26 (permalink) Old 01-13-2008, 03:18 AM
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Yes 120 volts to 12. It's a tansformer plug, I belive. From a charger of some sort.
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post #14 of 26 (permalink) Old 01-13-2008, 05:07 AM
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make sure it has a built in rectifier, otherwise you could blow an led, considering that most cant take 15 volts and a 10:1 xfmr has a 16.9 volt peak on the secondary. Most purchased units will have this, but with diy, often times things like this could be overlooked

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post #15 of 26 (permalink) Old 01-13-2008, 05:17 AM Thread Starter
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rectifier is simply a diode, right ? if so, a resistor would be the same. wouldnt it ?
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