[NJARC] A slightly off-topic request

[Jim Whartenby]

Dave
Check Newark Electronics for a two coil latching relay.  The two coils
are polarity sensitive and are used to pulse the relay armature to
either set or reset position.  A permanent magnet holds the armature in
either state (set or reset) so this relay has memory.  They come in at
least 24 and 12 volt coils, six volt would be ideal for your
application.
Regards,
Jim

--- Dave Sica <davesica at juno.com> wrote:

> Visit our web site - See http://www.njarc.org
> _______________________________________________
> I am putting together a remote control circuit for use at our church
> to
> switch the air conditioner thermostat on and off. I salvaged
> circuitry
> from a defunct DVD player which will provide me with +5 and -5 volts
> DC
> pulses as required. Now I need to make this control a relay that will
> latch on with the +5 volt pulse, then latch off when hit with the -5
> volt
> pulse. 
> 
> Then it hit me: I could probably design a circuit to do that using
> vacuum
> tubes, but that doesn't really seem like the right solution here ;-)
> 
> So I figured I'd toss this out to the *real* engineers out there. My
> grasp of solid state is kinda weak, so although I could probably
> muddle
> through this in time, I figure something like this must be the
> proverbial
> piece of cake for a lot of our members. The circuit won't need to
> switch
> any appreciable voltage or power, but I do want to use a physical
> relay
> rather than a solid state switch of any sort.
> 
> I'll appreciate any suggestions!  I'd also like to scrounge up the
> necessary parts if anyone's got the appropriate stuff lying around. 
> 
> Thanks,
> --Dave Sica
> _______________________________________________
> NJARC mailing list
> NJARC at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/njarc
>