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?
Thanks