[Noisebridge-discuss] A simpler circuit for ... [driving multiple LEDs with minimal batteries]
cm.hardware.software.elsewhere at gmail.com
Wed Jan 19 19:49:19 UTC 2011
On Wed, 2011-01-19 at 09:59 -0800, Dr. Jesus 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!
http://www.diodes.com/datasheets/ZXSC380.pdf , Figure 2.
Doesn't get much simpler than that (and Tony found and posted the most
simplest implementation recently):
How do you make an iterative optimization heuristic _stop_ when it has
found an optimum?
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