Re: Two Lamps?

I went out and got the proper resistor you
recommended and it works great with only
one bulb now.
Thanks for been patient with me, I learned something.



--- In CAD_CAM_EDM_DRO@yahoogroups.com, Randy Wilson <yahooey@r...>
wrote:

>
> On Dec 14, 2004, at 11:43 PM, Torsten wrote:
> >
> > Some body suggested using only one bulb and a
> > resistor.
>
> That would be me.
>
> > The only Resistor I have laying here is a
> > 4.7 k-Ohm 1/2 watt type.
>
> This is almost five times more resistance than what I suggested for
> your MAXIMUM resistance value.
>
> > I tryed wiring this in series with one bulp
> > but I got nothing no light at all.
> > Should there not be at least something.
>
> Of course not. If there is not enough current flowing to heat the
> filament adequately, so unless your vision extends into the

infrared

> you won't see squat. The value you used will permit 5ma to flow as
> opposed to the 27ma starting point I suggested or the 40ma the bulb

is

> rated for.
>