On Thu, 07 Jan 2010 12:30:23 -0600, Don Foreman
wrote:

On Thu, 07 Jan 2010 10:28:57 -0500, Spehro Pefhany
wrote:

On Wed, 06 Jan 2010 22:22:56 -0600, Don Foreman
wrote:

http://members.goldengate.net/dforeman/yellowlight/

Velly nice!

What do you use for a power supply?

That's my next project. G It needs to be a 700 mA current source
with load voltage circa 3 volts or so. Previous version was 350 mA so
an LM317 and sense resistor epoxied on the top of a wallwart sufficed.
Might work here too if I can find a 4.5 or 6 volt 700mA wallwart.
Else, maybe a little switcher.

It's cheating a bit, but have you seen these?

http://www.leddynamics.com/LuxDrive/...1-BuckPlus.pdf

$15.99 in one-off for the 700mA version and another $1 for the one
with dimming.