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Author Topic: LED BUTTONS POWERED BY USB ((SOLVED BY MALENKO & NEPHASTH))  (Read 1990 times)

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Caparo8bit

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LED BUTTONS POWERED BY USB ((SOLVED BY MALENKO & NEPHASTH))
« on: April 24, 2014, 09:00:40 pm »
Im in the middle of my first project and i might add LED buttons since im using a decased laptop is posible (safe) to power up 6 buttos or more with USB ?
« Last Edit: April 25, 2014, 05:53:27 pm by Caparo8bit »
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Malenko

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Re: LED BUTTONS POWERED BY USB
« Reply #1 on: April 24, 2014, 09:41:00 pm »
should be, if in doubt get a powered USB hub
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pbj

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Re: LED BUTTONS POWERED BY USB
« Reply #2 on: April 24, 2014, 10:10:38 pm »
Safe?  Who cares do it anyway.
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Caparo8bit

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Re: LED BUTTONS POWERED BY USB
« Reply #3 on: April 24, 2014, 11:04:44 pm »
Quote from: Malenko on April 24, 2014, 09:41:00 pm
should be, if in doubt get a powered USB hub
Quote from: Malenko on April 24, 2014, 09:41:00 pm
should be, if in doubt get a powered USB hub
yeah i think im getting a usb pwrd hub they r only $4.50 Thanks ...
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Nephasth

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Re: LED BUTTONS POWERED BY USB
« Reply #4 on: April 25, 2014, 12:01:52 am »
USB 2.0 has a max output of .5 amps. Assuming you're using all blue LEDs (since that's what you have pictured), 6 of them would have a continuous forward current of .12 amps and a peak forward current of .3 amps. You'll be just fine without a powered USB hub.

Quote from: pbj on April 24, 2014, 10:10:38 pm
Safe?  Who cares do it anyway.

Your jeans would beg to differ.
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Caparo8bit

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Re: LED BUTTONS POWERED BY USB
« Reply #5 on: April 25, 2014, 05:49:39 pm »
Thanks Neph im getting the powered USB for my second project will b using  16 to 18 LED buttons. Thanks to all for your help .
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yotsuya

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Re: LED BUTTONS POWERED BY USB
« Reply #6 on: April 25, 2014, 05:57:31 pm »
Quote from: Caparo8bit on April 25, 2014, 05:49:39 pm
Thanks Neph im getting the powered USB for my second project will b using  16 to 18 LED buttons. Thanks to all for your help .

For that many buttons, go with an LED controller.  :cheers:
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mike boss

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Re: LED BUTTONS POWERED BY USB ((SOLVED BY MALENKO & NEPHASTH))
« Reply #7 on: May 10, 2014, 09:54:33 am »
This is great info.
I want to power 8 LED buttons for my Punch-Out bartop.
It will be a PC powered project and I was unsure how to do so.

Thanks
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