Re: How to power a halogen bulb?
James Sweet <jamessw...@hotmail.com>
HiC wrote:
> 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
You can get big 12V power packs for LV garden lights and halogen track
lighting is popular now, small switchmode converters are available to
run 12V halogen lamps, just don't try running non-resistive loads off
them, they put out a nasty waveform which only appears to be 12V to an
incandescent lamp.
