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One switch, two circuits--can it be done?

 
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d0ugparker
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Joined: 16 Feb 2010
Posts: 1

PostPosted: Wed Feb 17, 2010 11:37 am    Post subject: One switch, two circuits--can it be done? Reply with quote

12v system.
2 circuits--1 incandescent (INC), 1 LED. Both run on 12v.
1 single pole, single throw switch.

I'm lighting a room in a haunted doll house. My requirements are that
either the INC circuit is on, or the LED circuit (a ghostly UV look) is
on--not both on at the same time.

Can the wiring be done (without any relays and such) so that when the
switch is on (closed), the INC circuit is lighted, and when the switch is off
(open) the LED circuit lights?

I'm sort of picturing both INC and LED wired in parallel, but with a
resistor somewhere to get the effect I want--sort of like a bad ground in a
car's tail lights (where the reverse lamp is always on, but when they step
on the brakes the reverse lamp goes off and the brake lamps go on
).

Know what I'm sayin'? Wink

Doug
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JingleJoe
HG Supreme


Joined: 01 Apr 2009
Posts: 52
Location: England

PostPosted: Thu Feb 18, 2010 1:25 pm    Post subject: Reply with quote

With a single pole double throw switch this would be possible but a single pole single throw? I think that not without some sort of fancy circuitry could your desired results be acheived.
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