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Need a Small 5v Power Supply

Posted: Wed Jan 23, 2019 8:36 am
by JonChown
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?

Re: Need a Small 5v Power Supply

Posted: Wed Jan 23, 2019 6:37 pm
by lyndon
LiPo?

Re: Need a Small 5v Power Supply

Posted: Wed Feb 06, 2019 11:19 am
by CircuitSmarts
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.

Re: Need a Small 5v Power Supply

Posted: Thu Feb 07, 2019 7:34 pm
by lyndon
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.