> I asked in another thread about a halogen bulb to light a projector. A
> particular DIY project site shows the use of a 12v 20w halogen bulb,
> presumably because that's what the projector they have puts out to the
> lamp
> socket. However apparently mine, which is uses 21V bulbs and I find that
> when I test the socket, it actually shows about 24V.

> The idea is to splice the halogen bulb on its own mouting into the wires
> for
> the projector's lamp. However, I assume I can't run a 12v bulb on a 24v
> source, if I can't find a 21v (or 24v?) 20-watt bulb, how would I go about
> rigging (or finding) an independent 12v (or whatever voltage) power supply
> for the halogen bulb?