Re: gEDA-user: Laser diode operation?

[Larry Doolittle <ldoolitt@xxxxxxxxxxxxxxx>]

Guys -

On Sat, Aug 30, 2008 at 07:38:06AM -0400, Bob Paddock wrote:
> On Friday 29 August 2008 11:15:03 pm Robert Butts wrote:
> > I'm using ten [laser diodes in] parallel.  I WAS going to
> > just use a 1 amp 5 vdc power supply with a 2.8 V zener diode
> > to adjust the voltage to 2.2 V. 
>
> Does not have to be complicated, but you never want
> to parallel LEDs/LASER Diodes as they are a current
> driven device.

Right.  The traditional and easy way to get a bunch of LEDs
(or equivalent) to light up equally is to put them in _series_.
Then you only need _one_ current limiting resistor (or fancier
circuit).  Can you trade in your 5V supply for a 24V supply?

   - Larry


_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user