Re: 5v to 12v Circuit

From: Robert Monsen (rcsurname_at_comcast.net)
Date: 02/23/05 

Date: Wed, 23 Feb 2005 00:06:12 -0800

LED Man wrote:
> Looking for a very simple (Newby) 5v to 12v circuit, or device, low
> cost, to run 120 ma 12v led off 5-6v
>
> TIA

You need a boost circuit.

You can buy DC-DC converters for this kind of application, but they may
violate your 'low cost' requirement. You can probably get them surplus.
I know I've seen them at halted specialties in san jose for a few bucks.

Here is a web page that describes the basics, if you want to try to
build your own:

http://www.powerdesigners.com/InfoWeb/design_center/articles/DC-DC/converter.shtm

You can also use switched capacitor circuits to do this, but it's hard
to get 120mA from one of these. 

-- 
Regards,
   Robert Monsen
"Your Highness, I have no need of this hypothesis."
     - Pierre Laplace (1749-1827), to Napoleon,
        on why his works on celestial mechanics make no mention of God.
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