LED's are so voltage sensitive,they'll fry if you feed
them with anything more than a couple volts (without a
resistor). The size of the resistor depends on the
voltage source you have.
The circuit I'm drawing off of will also appreciate
the current limiting of the resistor (less chance of
pulling too much and affecting something).
Thanks!
Steve P.
--- "Bernd D. Ratsch" <bernd@dodgetrucks.org> wrote:
>
> Why put a resistor on the LED...you want almost no
> resistance on the
> circuit.
>
> - Bernd
>
> -----Original Message-----
> From: Steve Preston [mailto:steveophonic@yahoo.com]
> Sent: Saturday, February 02, 2008 9:43 PM
> To: dakota-truck@dakota-truck.net
> Subject: Re: DML: RE: MDS "on" LED...
>
>
> Thank you Bernd!! :)
>
> I should go with a red LED,because it won't need as
> much current,but I like BLUE! If I feed it through a
> 1kohm resistor or higher,it should be a negligible
> draw,not enough to affect anything.
>
> Thanks!
>
> Steve P.
>
> --- "Bernd D. Ratsch" <bernd@dodgetrucks.org> wrote:
>
> >
> > You could tap into the MDS control circuit (C3
> > "Black" connector at PCM -
> > Pin #6: Brown/White Wire - MSD Solenoid #1) but
> I'm
> > not sure how the PCM
> > will react with a slight change in resistance on
> the
> > MDS control side. It's
> > not going to be activated in stop and go, city, or
> > short highway runs
> > though.
> >
> > - Bernd
> >
> > -----Original Message-----
> > From: Steve Preston
> [mailto:steveophonic@yahoo.com]
> > Sent: Saturday, February 02, 2008 8:31 PM
> > To: dakota-truck@dakota-truck.net
> > Subject: DML: MDS "on" LED...
> >
> >
> > Hey DML! Is it possible to find some source of
> > voltage,either 5V or 12V,that is present only when
> > the
> > MDS system is operational on a Hemi? Anybody know
> > where such a source might be easily found? I want
> to
> > tap into that with a resistor and bright blue LED
> to
> > mount on the dash,to let me know for sure when I'm
> > in
> > four cylinder mode.
> >
> > Thanks!
> >
> > Steve P.
> >
> >
> >
> >
>
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>
>
>
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