Re: AC to DC quesiotn, old worklight

I would think that if the lamp is resistanced based, it would
probably work at 24v AC with a slightly reduced light output.

Ohm's law, reactance, RMS and all that stuff

Jeff

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "volitan712003"
<volitan@o...> 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.
>
>
> Thanks
> David