As previously mentioned, i've got some RC-230 cateye halogen lights and a 7.2v nimh battery. I was thinking of putting an LED upgrade into one of the housings.
Now, I've just had a thought... I've got an AllTeamGo Cree XR-E P4 bike light already, but it runs at 4.5v (3xAA).
How do I reduce the input voltage from 7.2v to 4.5v? I presume I can use a potentiometer or a resistor, but it's 20 yrs since I touched electronics theory at college and can't remember diddly.
(I think the LED is directly driven so I don't want to risk burning it out)
Cheers
