Need a Small 5v Power Supply

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JonChown
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Joined: Wed Jan 23, 2019 8:28 am

Need a Small 5v Power Supply

Post by JonChown » Wed Jan 23, 2019 8:36 am

Hello all,
I am trying power a short 2 or 3-foot strip of LED lights (WS2811). These are 5v. I cannot find a battery pack small enough to easily conceal. I have tried stacking two watch batteries, which gives 6v and not enough amperage. Any suggestions from the pros out there?

lyndon
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Location: Minnesota, USA

Re: Need a Small 5v Power Supply

Post by lyndon » Wed Jan 23, 2019 6:37 pm

LiPo?

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CircuitSmarts
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Joined: Wed Jan 30, 2019 8:42 am

Re: Need a Small 5v Power Supply

Post by CircuitSmarts » Wed Feb 06, 2019 11:19 am

Hi,

You need to use a voltage regulator like LM7805 that regulates the 12V to 5V. It will work for your.

I hope it will help you.

Thank you so much.

lyndon
Support Volunteer
Posts: 1643
Joined: Thu Jul 17, 2008 6:37 pm
Location: Minnesota, USA

Re: Need a Small 5v Power Supply

Post by lyndon » Thu Feb 07, 2019 7:34 pm

No, Please dont.
The LM7805 will drop 7V to do that, all the while passing whatever current your LEDs need. There will be a spectacular waste of battery power!
Not to mention that no one mentioned 12V in this thread.

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