[Noisebridge-discuss] A simpler circuit for ... [driving multiple LEDs with minimal batteries]

Taylor Alexander tlalexander at gmail.com
Wed Jan 19 11:34:34 PST 2011


Hey, I did a quick search and found a nice 1.1v->14v step up chip from
National Semiconductor.
http://www.national.com/pf/LM/LM2623.html#Overview

Its in a 5 pin SOT-23 package, so it *could* be wired without a PCB if
you're careful (though I don't know if performance would suffer), so
maybe the non-techies could follow a schematic for that and wire their
own? Or maybe someone could make a PCB for it that the non-technical
people could use?

-Taylor

On Wed, Jan 19, 2011 at 9:59 AM, Dr. Jesus <j at hug.gs> wrote:
> On Wed, Jan 19, 2011 at 9:21 AM, T <t at of.net> wrote:
>> IYHO, why focus on linear regulators?  As Jonathan Foote pointed out,
>> they aren't really more efficient than a simple resistor.  Are they
>> simpler in any sense?
>>
>> If you want efficiency (which IMHO is a must when powering with
>> batteries) don't you need a boost or buck or other switching supply?
>
> Sure, if I'm the one doing the design.  However, there's an entire
> class of people at Noisebridge who just want some power for an art
> project and they're more interested in cheap and fast than efficiency.
>  If you have a simple switching supply you want on the poster, draw
> one up!
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