On Fri, 10 Jun 2005 06:02:21 GMT,
TeakSeal wrote:
On Wed, 8 Jun 2005 09:46:59 -0700, "Gordon"
wrote:

I want to replace all my old fixtures with new led types. 6 spots and 3
puck style ceilings. Where to purchase at a decent price?

Gordon

Do you need zener diodes or something to limit the DC when your motor
starts charging? The LED's are 12v and the alternator puts out 14
something, right? Do people do this for the whole panel? Thanks.


Most of these bulbs use a dropping resistor to limit the current draw,
there will be no problems using them at 14-15VDC, in fact, some of
them work fine from 10VDC-30VDC. Check the spec sheets for specifics.

The better way is to drive them via a constant current supply, or a
pulse width modulation driver. The latter gives the additional benefit
of allowing you to vary the brightness.

--
Jim Richardson http://www.eskimo.com/~warlock
Don't get mad, get Linux