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convert 3v to 12v?

nopuk

May 11, 2015
22
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May 11, 2015
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22
Hi,
Would like to build a small LED light system powered by 2 AA's i.e 3v. But I would like 12v for what I have in mind.

Is there anyway to go about this? What components do I look for ? What are the downsides?
 

BobK

Jan 5, 2010
7,682
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Jan 5, 2010
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7,682
The question is why you would want to use 12V for LEDs when the max voltage they require is about 3.5V?

And what kind of power are we talking about?

Bob
 

bertus

Moderator
Nov 8, 2019
3,378
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Nov 8, 2019
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3,378
Hello,

When you convert the 3 Volts to 12 Volts, the current on the 3 Volts side will be at about 4.5 to 5 times higher, due to efficiency losses.

Bertus
 

Audioguru

Sep 24, 2016
3,656
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Sep 24, 2016
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3,656
A string of LED "fairy lights" is sold at The Dollar Store and uses one AA cell and lights about 20 LEDs.
I have two that have 10 LEDs that can be switched on or switched to flashing and they are powered from one rechargeable AAA cell and are charged from a little solar panel.

The LEDs are all matched so that they are connected in parallel.
 
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