Homebrew_PCBs

While on the subject -

Keep in mind when doing jump starting this Winter, come cars are
being switched over to 24 volt system (not positive it is 24Volts,
but something higher than 12 volts).




--- In Homebrew_PCBs@yahoogroups.com, Robert Hedan
<robert.hedan@v...> wrote:

> Yeah, removing negative is much better, I posted the wrong

terminal. It

> also doesn't generate sparks when you're fiddling with it.
>
> Don't rely on which cable is grounded on the chassis though, there

are

> models that use positive ground just to keep people on their toes.
>
> The best indicator of which cable is which is the small symbol

near the

> terminal. Don't trust the terminal rubber covers or cable

colours 'cause

> that can be replaced 'wrong' by a previous owner.
>
> Robert
> :)
>
>
> -----Message d'origine-----
> De : Homebrew_PCBs@yahoogroups.com

[mailto:Homebrew_PCBs@yahoogroups.com] De

> la part de Stefan Trethan
> Envoyé : juillet 3 2005 13:53
> À : Homebrew_PCBs@yahoogroups.com
> Objet : Re: [Homebrew_PCBs] Re: Hmm, another thought....
>
>
> You know it is better to disconnect negative? If you start with

positive

> you can easily short it to ground with the wrench while you undo

the nut

> on the clamp. Also, there is often no obstructing rubber thingy on

it.

> Open circuit is open circuit so that doesn't change anything.
>
> As for using car batteries for EDM, you still need to limit

electrode

> current and switch it on/off. You could probably replace the first

part of

> the large supply schematic with them, but i think then you can

just as

> well go all the way.
>
> ST
>
>
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>
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