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Possible to use these LED strips?

post #1 of 11
Thread Starter 
Hi OCN!

I have a friend that sells LED products and a little while ago he gave me a spool of LED strips without much explanation about how to use them.
I was wondering if anyone has any ideas about how they can be used in a computer case as well as if there is any way to cut them into different lengths to put them in different places.
Here are some pics to show the strip and the connections.





Thanks!
post #2 of 11
They look to be the same as most led strips you find anywhere. Check if there are three leds between cut lines. If so, they're twelve volt compatible, and you can just run them off your +12v rail(s).
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by poizone View Post

They look to be the same as most led strips you find anywhere. Check if there are three leds between cut lines. If so, they're twelve volt compatible, and you can just run them off your +12v rail(s).

Thanks for the reply. There aren't any distinct areas marked as cut lines, but there does seem to be a pattern where three LED's are being grouped together.
After cutting the strips how would you go about wiring them to the PSU? Is there are soldering necessary?


Edit:
These are actually the strips here:
http://www.oznium.com/led-ribbon

As it turns out, those four little circles designate cut lines.

Edited by fourdot00 - 8/25/12 at 10:37pm
post #4 of 11
Quote:
Originally Posted by fourdot00 View Post

Quote:
Originally Posted by poizone View Post

They look to be the same as most led strips you find anywhere. Check if there are three leds between cut lines. If so, they're twelve volt compatible, and you can just run them off your +12v rail(s).

Thanks for the reply. There aren't any distinct areas marked as cut lines, but there does seem to be a pattern where three LED's are being grouped together.
After cutting the strips how would you go about wiring them to the PSU? Is there are soldering necessary?


Edit:
These are actually the strips here:
http://www.oznium.com/led-ribbon

As it turns out, those four little circles designate cut lines.

Ok I'm not trying to be a jerk but are you just asking someone to copy and paste the information on the page that you linked to answer your question?

I have never used these but after reading the web page you posted:

Each strip has 2 sets of leads already soldered on. The leads can be used for 2 purposes. Either you use one entire strip and one set of leads is to power the strip and the second set of leads is to extend the strip. Or you can cut anywhere between the sets of 4 dots and you can use one set of leads to power the 2 strips you just created.

If you need to create more than 2 strips out of that single strip then when you cut between a set of 4 dots the 2 dots that will be left over are your contacts. You will need to carefully solder a lead to each of those 2 dots.

You will not damage the LEDs by wiring in reverse polarity so if you are unsure which is positive and which is negative just hook it up. If it does not work then switch the wires.

The only answer that was not included on that web page was the last which was simply deduced by seeing the copper dots.
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post #5 of 11
Thread Starter 
Yeah, I feel like a total idiot. For some reason I never thought to check out the product page, I figured there wouldn't be much information regarding the wiring. rolleyes.gif

A few more points maybe you guys could clarify.
There are wires that can power the strip on both ends, so if you cut it into two pieces you can use both halves. Is it possible to cut the strip into more than two pieces and somehow solder the +/- wires on the the strip somewhere, or is that not something easily done outside of the factory?
And, what would be the best solution for hooking up the bare +/- wires to the PSU. Are there any converters that exist?

Edit:
*lesigh*
I probably should have spent a little more time researching on my own before posting. I'm finding out more information by googling. So uh, yeah... apologies for my ignorance. redface.gif

My question about splicing the strip still stands though.
Edited by fourdot00 - 8/25/12 at 11:11pm
post #6 of 11
Quote:
Originally Posted by fourdot00 View Post

Yeah, I feel like a total idiot. For some reason I never thought to check out the product page, I figured there wouldn't be much information regarding the wiring. rolleyes.gif

A few more points maybe you guys could clarify.
There are wires that can power the strip on both ends, so if you cut it into two pieces you can use both halves. Is it possible to cut the strip into more than two pieces and somehow solder the +/- wires on the the strip somewhere, or is that not something easily done outside of the factory?
And, what would be the best solution for hooking up the bare +/- wires to the PSU. Are there any converters that exist?

Edit:
*lesigh*
I probably should have spent a little more time researching on my own before posting. I'm finding out more information by googling. So uh, yeah... apologies for my ignorance. redface.gif

My question about splicing the strip still stands though.

Its all good I have asked questions that are obvious TOO smile.gif

But I had to give you some crap

That being said its time to give you more crap...

DID YOU READ MY POST OR DID YOU SKIP IT AFTER THE FIRST SENTANCE!

The question you are asking is answered in my post. I tried to think of any questions you would have ahead of time.

I explained that you must CUT between the GOLD dots and that those GOLD dots are CONTACTS. You will have to CAREFULLY SOLDER WIRE to these GOLD DOTS.

As far as your second questions I did actually previously think to include the answer to this question as well but thought that GOOGLE was obvious enough. You can buy molex pins, and molex connectors and create a custom plug. OR you can rob an old fan of its cord and splice them together.

Before you make the permanent connections please make sure you have tested you have the polarity correct.
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post #7 of 11
Thread Starter 
Ugh, I'm not usually this much of a ditz! After you helped me realize that I had answered my own questions, I guess I didn't read the rest of your post in my haste to reply. Thanks for the help, +rep. thumb.gif
post #8 of 11
Thank you and I hope you know I was not serious about the poking fun... Or was I? Lol

I just couldn't resist it just seemed hilarious that you posted the link yourself that answered most questions smile.gif

To solder the gold dots I would recommend you put solder onto the wire first then touch the wire to the gold dot then put the iron onto the bare wire. Test for strength bye giving it a little pull then glue in place.

Be careful it looks like that strip is worth $100-150.
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post #9 of 11
Thread Starter 
I've been doing some more reading and was considering trying to wire a piece of the strip to be sound activated from an AUX input following something along these lines (along with a 1k resistor between the incoming positive audio signal and the transistor's base leg):



Hoping to bounce some ideas/ get tips if I'm headed in the wrong direction.

I figure I would wire it using a chopped fan cable (per your suggestion) and probably some 22 awg wire for the in between bits (ie ground to the tip31 transistor).

As far as power sources go, do you have any recommendations about things to stay away from? I've considered the following options:
-Power from a 4pin molex right off the PSU (molex --> chopped 3pin)
I figure powering from the PSU would be the safest/easiest. The only concern I have is eating up too many of the peripheral 4pin outputs from my PSU. I could get a 4pin splitter, but I'm not sure what the power draw on a foot of LED strips would be like in comparison, to say, a case fan.
-Power from a fan header on the motherboard
I've read people have concerns about splitting and running multiple fans off a motherboard header reducing the efficiency of the motherboard and again, I'm not sure how the power usage of the LED strips would compare.
-Power from the 4 fan header that is included in the Antec Eleven Hundred
Powering from one of the four headers built into my case (powered by one 4pin molex coming from the PSU) would seem like a simple solution and I may end up doing this unless you think there may be problems.
-Power from a fan speed control front panel.
Finally, powering from a fan controller might seem to provide the most options. I would think that with the circuit wired directly to a power source (say the PSU) the LEDs would always be on (or off, I'm not sure how the transistor effects it), but if I had it wired to a fan controller I could have the option to turn the lights off if I so desired. That is unless the knobs controlling the fan speed would have no effect on the power sent to the LEDs? Also, it would be interesting if the controller knobs were able to adjust brightness, however I'm not sure how LED's react to dimming.
-Power from an LED distribution block.
Found this on FrozenCPU:

As for the AUX connection, I was thinking I could run it out the back of the case and hook it up to a splitter with my stereo plugging into the other jack and then plugging the combined into the audio port on the motherboard.

Also, I shouldn't have any problem daisy-chaining multiple strips together right?

Lastly, once each of these connections are set with solder, are there any other things I could do to protect them? I know you mentioned glue, what about heat shrink tubing or electrical tape? I guess I should ask, any suggestions for wire source?

I know there are some convenient cathode solutions, however those are sound activated through a microphone and I'm just not convinced they are sensitive enough. Plus this looks like a fun project!
Edited by fourdot00 - 8/27/12 at 1:42am
post #10 of 11
Hit the "easy/cheap led" link in my Sig.

Edit: better yet, see next post. tongue.gif
Edited by Ramsey77 - 8/27/12 at 8:58am
 
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