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Overhead projector bulbs, AC or DC? Answered

I have some quartz projector bulbs, do they run on AC or DC power?

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user
kelseymh (author)2009-10-06

Yes.

Look at the markings on the bulbs, and use Google to find the specifications. Some projector bulbs run directly off of AC, some have AC-to-DC low voltage converters in the projectors.

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user
DELETED_GuardianFox (author)2009-10-05

Give em back, they're expensive. Dummy.

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user

seconded...most people shouldn't have their hands on some unless they have a projector.

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frollard (author)2009-10-06

usually they are AC halogen bulbs - but take that with a grain of salt. Not all are created equal. A 12V bulb with have fatter electrodes on an 'insert and twist' base. AC bulbs will have straight 'push insert' pins. Most old-skool overhead projectors don't have much for circuitry in them (if any) except for the cooling fan - thus they couldn't run a DC bulb on mains voltage.

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