Re: [CAD_CAM_EDM_DRO] AC to DC quesiotn, old worklight

On Thu, 30 Sep 2004 18:16:16 -0000, you wrote:

>
>Hello,
>
>I'm helping a friend with a real old Mori Seiki (sic?) lathe. Of all
>the things to obsess over, he wants the worklight to be functional
>from the original switch on the control! All that's left from the
>original light is a housing and a "dish" that hold the bulb.
>
>There's a sign near the light that says to use a 24v, H3 Halogen bulb.
>We managed to find these on-line. Trouble is when I measure the
>voltage going into the switch, it's around 24 volts alright, but it
>seems to be AC?! I have no idea of the amperage.
>
>I'm assuming the bulbs are DC, although I haven't tried it yet. I'm
>also assuming there was some type of current converter originally in
>the housing itself (there's an awful lot of room in there for just a
>bulb).
>
>If I'm right on this, should we be able to use a bridge rectifier and
>a variable resistor, after the switch, to convert the voltage and
>bring it back down to 24v? Would a cap be necessary? And Am I just
>barking up the wrong tree altogether?
>
>I suggested a totally new worklight, they're on ebay cheap enough. But
>he wants to try it this way first... He really likes this old clunker,
>and wants to try and keep it original.
>

Why would the halogen bulb need to be run from DC?

I'd give it a try.

Harvey

>
>Thanks
>David
>
>
>
>
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