Luxeon Buckpuck 3023 - Resistor dimming ?

G'day all,

This is my first post on this forum, but I've been lurking here for a while.

I am building another prototype bike light and I have struck a problem.

I'm using 3 Seoul stars and a 3023 model buckpuck with dimmable control.

The problem is that when I put a resistor across the CTL and REF leads I'm not getting any light at all. (With the CTL and REF disconnected I get full power).

The resistors I'm using are:

200ohm
470ohm
90ohm

0.5w 1% mini.

These are little blue resistors, but Gilbo's are brown if that makes any difference ?

http://gilbertosphotos.fotopic.net/p41979240.html

I want to dim the LED's at the same percentage rates as Gilbo's instead of using pot's and switches.

What am I doing wrong ?

Thanks for reading.

Here's a link to my other prototype:

http://forums.mtbr.com/showthread.php?t=302818

Tony

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