This was my first idea (er, brain fart). The idea was to send a 12 VDC or a Ground to one end of both relay coils via the single wire. Connect the other end of one coil through a diode to Ground so it would energize when the 12 VDC button was pressed, and the other coil to 12VDC via a diode so it would energize when the Ground button was pressed.
This doesn't work because when you hook it up you will find the diodes and coils all in series across the system voltage dropping six volts across each coil continuously. With Rufus' system one could put a capacitor in there somewhere, perhaps with a resistor and/or diode, so that the capacitor would help the flip the relay (remember it is a latching relay) over to the opposite state. But you need a DPDT latching relay. Norm S/V Bandersnatch Lying Julington Creek 30 07.695N 081 38.484W > [Original Message] > From: Ken James <[EMAIL PROTECTED]> > To: <[email protected]> > Date: 7/28/2008 1:57:54 AM > Subject: Re: [Liveaboard] 1 wire relay cntl - fr. 12 VDC buss > > A better way to do this is to use diodes to > rectify the incoming voltage of either positive or > negative polarity and send it to either one relay > coil or the other of a relay as needed. > You would still have one wire but always have a > voltage to the relay when it is sent. > The method you describe would result in the relay > failing to operate properly.-Ken > > __ _______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
