You got me on the 1-button vs. 2-button. But riddle me this: If you use two 
buttons, just how do you get away w/ONE wire??? <g>  My experience w/rocker 
switches is that it's easy to hit the wrong side or both in succession. Toggle 
switches are better but they are much easier to hit accidentally and are liable 
to getting broken off or hurting somebody (when people slip, fall or get thrown 
about). Two push buttons would seem the most functional, but also the most work 
(two holes instead of one). Pilot lights would also seem a good idea but that 
would be _more_ wires; well, maybe you could set it up so the signal wire 
remained hot after the switch event...

And, yes the relay might oscillate dependent how long the button was held 
unless additional circuitry was used on the signal to open it electronically 
after the coil activated and not allow  another event until the button had been 
released. But hey, the big challenge was that one wire thing for two events 
spec!

Rufus



> ----- Original Message -----
> From: "Norm of Bandersnatch" <[EMAIL PROTECTED]>
> To: [email protected]
> Subject: Re: [Liveaboard] 1 wire relay cntl - fr. 12 VDC buss
> Date: Sat, 26 Jul 2008 12:27:15 -0400
> 
> 
> 
> Rufus,
> 
> This sounds like a push-push arrangement.  One push for each change of
> state.  With capacitors and resistors to charge them the switching might be
> made a little more stable.  Then again, if you held the "momentary contact
> switch" down a bit too long would not the latching relay snap back and
> forth?
> 
> But I specifically stated "center-off momentary toggle switch or two
> pushbuttons at the control end".  This is to insure the latching relay
> would really be in the position you requested.  Push-push operation will
> not do this.
> 
> Try again...
> 
> Norm


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