REFLECTOR: Progress

[Geoff Gerhardt]

Jack,

What sort of EI are you using?  A LightSpeed EI offers a "p-lead" like
disable where grounding of this lead will disable the ignition.  When I
took over my project, it came with an older Lightspeed ignition box.  I
took a look at the wiring schematics on Klaus' website and saw that this
option was available and assumed it was enabled on my box.  I wired my
ignition system such that I used this to control my box.  But, when I
started my engine, I found that it didn't work (ignition as on regardless
of the p-lead grounding switch position).  After talking to Klaus at LS, I
found that this "p-lead disable" was an option and had to send my box back
to Klaus to get it installed.

I use two switches, one for my mag, one for the EI, but if you had a LS box
with this option installed, you could use a regular keyed ignition switch.

Geoff

On Fri, May 18, 2012 at 12:33 AM, Jack Prock <jackprock at wavecable.com>wrote:

>   Hi,
>
> I am working on the final design of my electrical system and was wondering
> if anyone has used a standard
> keyed ignition (OFF-Left-Right-BOTH) when set up with one mag and one
> electronic ignition system?
>
> Up until today, I was thinking that I could use a standard aircraft keyed
> switch, but I didn’t realize that the mag is shut off by
> grounding out one of the leads. This means that when the keyed switch is
> in the off position, the two terminals and the center
> post are actually connected. And when in the BOTH position, the two
> terminals and the center post are not connected.
>
> I can think of a way to use the keyed switch... but the motion of the key
> turns from right to left, not left to right. I would just need
> to create a new label and use a relay for the Mag connection. This would
> have the added benefit of not having the mag wire
> anywhere near the radios to cut down on e-noise. I just don’t like the
> opposite key rotation.
>
>
> Are people with electronic ignitions using a two simple switches?  1)
> Elec-IGN   2) MAG
> Do you have a key/lockset at all?
>
> Any input would be helpful.
>
> Thanks,
>
> Jack
>
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