John,

I can help but you will need to do some electronic assembly.

If you know how much current the light draws then I can calculate the
correct size power resistor you can put in series.

Or I can draw a simple regulator schematic you can build with a LM317
regulator.

All depends on how good you are with electronic assembly and soldering.

Tom Hargrave
www.towercooler.com

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf Of
John C...
Sent: Thursday, January 27, 2011 9:34 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Running a 4.5v LED on 12v

Hi All,

I have 4ea. 4.5v LED Wally head lamp lights that I would like to use
as porch lights on my Pop Top.

*http://tinyurl.com/4b6cgcj*
2 on each side of the top.
I would also like to run them independently at times.

Is there a way to modify the 12v's from the cars system
to run these?

Would I need a separate power supply?
Or is it possible to just integrate a resistor?

And to perplex the situation ;o)
Is there a 12v motion detector
that can be wired in.

I see Wally has a portable motion detector alarm,
for hotel door knobs.
Perhaps it could be modified to work
in conjunction with the switched lights as well?

Thanks
John