Re: Re[2]: more lighting questions

["Bob D'Amato" <Bob.Damato@starfleet.itc.snetlink.com>]

On Fri, 28 Apr 1995 llevitt@idcresearch.com wrote:

> 
> 
>           I've wired lamps this way for 20 years and haven't had to
>           put one out yet. Uh, strike that, there *was* a little
>           problem with the lights on my wife's Camry, but it wasn't my
>           fault. Honest. I meant to put the fuse inline. I really did.
>           Pretty blue smoke and a weird smell! And that was from
>           my wife! <g>
> 

You know.. I would have to think about that, but that was the Rule #1 in 
EE @ UCONN. Thinking about it I would say because if you switch groung, 
you are having a positive potential at the relay. If you switch Vcc, you 
wont have potential differences at the relay (Or bulb or wherever) It 
will work either way, but... :)

By switching ground, you always have a 'hot' lead at the relay. If this 
wire were to wear to ground, you cant switch it off, albeit fused 
(Usually <g>). Ill look it up and see what I can find.

(It's been a while ya'know)
Bob



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