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Why wont my USB port power up? (Game controller Tower DIY)

Why wont my USB port power up? (Game controller Tower DIY)

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  #1  
Old 10-31-14, 12:14 AM
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Why wont my USB port power up? (Game controller Tower DIY)

So I made a controller and headset tower for my gaming accessories and decided to add LED's and a USB port to use to recharge my headset.
I used 3 strips of 12V LEDS each with about 15 LEDs in a strip. The USB port is the kind you would plug into your cigarette lighter in your car. When I tested the USB port on the 12V power input without LED's it powered up perfectly. But when I have the LED strips powered up along with the USB port. The USB port is getting significantly less power and is not strong enough to charge a controller or headset. Along with this project I have been making a video tutorial on how to make your own. I havent ran into this kind of problem before and wanted to know if anyone could help me out. It should be possible to power up everything with one power input, Right?
Here is a link to the first video I did of the project. https://www.youtube.com/watch_videos...oads&more_url=


That just shows you how I made it. It doesnt have anything to do with soldering or power or anything. However here is the project today!

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I would really love to get this problem solved!
Thank you for reading!
 

Last edited by Jimmie Mitchell; 10-31-14 at 12:49 AM.
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  #2  
Old 10-31-14, 04:09 AM
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Having the LED's on an already minimally powered source will adversely affect the ability of the power source to push enough power to the USB for charging. You will need to figure the draw from the LED's in amperage and what the output rating is on the source to determine what is left for your USB charging port.
 
  #3  
Old 10-31-14, 06:05 AM
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Well the source is a 12v power supply i bought from radio shack to fit the coaxial power jack.
So if I bought a higher power supply you think that would solve the problem?
 
  #4  
Old 10-31-14, 08:56 AM
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Well the source is a 12v power supply i bought from radio shack to fit the coaxial power jack. So if I bought a higher power supply you think that would solve the problem?
Many are less than 1 amp. What is yours? Without knowing how many amps the LEDs and DC converter draw no way to know. You can use a multimeter to measure the amp draw of each item if they are around 200 ma or less. (Many multimeters won't read more.)
 
  #5  
Old 10-31-14, 02:30 PM
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It says
500 mA on it. Thats really all i know.
 
  #6  
Old 10-31-14, 02:42 PM
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That's 1/2 amp - very little.
 
  #7  
Old 10-31-14, 03:25 PM
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You should use at least a 1A supply or larger. Amazon has many to choose from and a couple of deals on 2A switching supplies.

amazon electronics: 12vdc power supplies
 
  #8  
Old 10-31-14, 04:30 PM
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It says500
Way to small. Not even enough to charge the battery of many things that use a USB charger.let alone power any lights. I have an Ebook tablet for instance that requires a 5 amp charger just for the Ebook battery. That is ten times the output of your power supply. You are going to need at least 5 amps (5000 ma) minimum in my opinion.
 
  #9  
Old 10-31-14, 04:54 PM
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I think he just requires a charger for his headphones.
 
  #10  
Old 10-31-14, 08:30 PM
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Well the lights do light up just fine. As pictured below its just the usb that isnt getting enough power.
 
  #11  
Old 10-31-14, 08:33 PM
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Ok so I guess its off to radio shack with project in hand trying various adapters until i get it to work. lol!
 
  #12  
Old 10-31-14, 08:48 PM
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Yeah I have a 2A power adapter I changed the heads out on and that didnt solve the problem. The lights do work and they are at full capacity because they dont even turn on without a 12V Current.
So youre saying if I up the amps to 5 it "SHOULD" work?
 
  #13  
Old 10-31-14, 08:48 PM
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The following adapter is available from the Shack. It's 15vdc but will work fine for your application....
Enercell 15V/1000mA AC Adapter : AC Adapters | RadioShack

Here's an even better choice....
Enercell 12V/1500mA AC Adapter : AC Adapters | RadioShack
 
  #14  
Old 10-31-14, 09:18 PM
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well see... This is the current adapter I'm using. Its 12 v and says 2 A max. So Im thinking youre on to something with the 15V Enercell.
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  #15  
Old 10-31-14, 09:22 PM
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I know I am using 12V power source and not drawing from the 5V because the lights simply wont turn on with out at least 12V. You cant see it but the power cable has 3 wires. 12V,5V, and Negative. It was originally meant to power an external HDD. I changed out the male adapter to the correct one for my coaxial power jack. ANYWAY!!! lol...
I'll check out the 15v 1000mA and see if it powers up everything.
 
  #16  
Old 10-31-14, 11:17 PM
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I doubt the 15v will yield any improvement. You should be able to run your setup on that 2A supply. You could actually use the 5v section to charge the headphones directly as that's what USB voltage is.
 
  #17  
Old 11-01-14, 06:18 PM
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Ok... what information do you need from me that I havent given? If youre saying it should work and it isnt then I need to narrow down the issue. What info do you need?
 
  #18  
Old 11-01-14, 09:53 PM
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I can tell you that the USB port is 5V 1A.
The LED's will power up with a 12V 500mA power source.
The USB Port also powered up with this source by itself and no LED's.
It also charged devices.
I am at a complete loss as to what the issue is. I purchased another USB port (same exact) to do some refilming of how to take it apart and attach the power and negative to the wire for power. It also reacted the same way with the flickering of the red light. Showing me it wasnt getting enough power.
 
  #19  
Old 11-01-14, 10:56 PM
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Do you have a voltmeter?

Connect just the LED's to the supply and measure the voltage.
Connect just the USB port charger to the supply (with your headphones charging) and measure the voltage.
Now connect them both and measure the voltage. If it sags with both connected then your supply is not supplying enough current.

Your supply says 2A but maybe it's not really delivering 2A.
 
  #20  
Old 11-02-14, 07:55 PM
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I do not have a voltmeter. In a case of me not being able to measure. What do you suggest?
 
  #21  
Old 11-02-14, 09:56 PM
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If this was my project, I'd use the 5V bus for the USB charging and the 12V bus for the LED's. From my experience those USB car chargers are junk.
 
  #22  
Old 11-02-14, 11:06 PM
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I forget to stress that this project needs to be able to be finished in a way where people can just go and buy the AC adapter. I am making a video to show people how to make their own. Honestly, I didnt think this would be an issue. It also needs to be able to be powered with one jack. So the option of running any additional wires or jacks is out. I changed the adapter again to one that is running an 1.5 A and this didnt solve the issue.
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Those are the LED's I bought. All it says on the package is for 12v dc only. It has no Amp information. I would assume that if they were able to power up with 500 mA that theyre usage is low.
 
  #23  
Old 11-02-14, 11:39 PM
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How about having a cord on it and wiring up a USB receptacle? You will need a proper box and strain relief for it, as well as a grounded cord.

 
  #24  
Old 11-05-14, 02:44 AM
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Thats a neat idea but my issues with that are
1. is it safe?
2. is it easy enough that anyone could do it? (really think on that one)
3. can it be easily covered with something so it looks pretty?
4. Would I have to use a resistor to keep my LEDs from blowing out
5. I hate my life....

I just dont understand why I'm having the issue of the USB port not getting enough power.
Im left with thinking that 3 or 4 amps is what i will need to get this to work.
I dont want to spend more money on adapters that dont work and I dont own a voltmeter.
 
  #25  
Old 11-05-14, 09:55 AM
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As stated earlier you need to determine the amps (or milliamps) each device needs and then use that to determine the power supply minimum amps. A cheap ~$10 multimeter will do that but may not be able to measure everything at once. In that case you will need to measure each device separately then add them up. If you don't want to spend money then I'd say you are at an impasse. https://www.youtube.com/watch?v=HWA9WqSEjg8

https://www.youtube.com/watch?v=HWA9WqSEjg8
 
  #26  
Old 11-06-14, 02:09 AM
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Really really strange thing just happened.
As I mentioned in a previous post, I changed the adapter to 12V 1.5A and was still not getting
the USB to power up enough. Well... For whatever reason, The USB Port is working now and charging controllers and my headset. How crazy...
I mean, Just out of the blue its working now and working great. So apparently something wasnt connecting the power right or something? Who knows... But it works.
 
  #27  
Old 11-06-14, 07:26 AM
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Gota love the mystery solutions. Thanks for letting us know.
 
  #28  
Old 11-10-14, 12:43 AM
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Here is the video and final product for those interested!
https://www.youtube.com/watch?v=y_GwNsdibvk
Thanks for your attention and help!
 
  #29  
Old 11-10-14, 08:49 AM
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Nicely done.

.
 
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