OR Gate for 12 light circuit

Thread Starter

kpgraci

Joined Jul 30, 2010
4
Hi all,

Novice, I've built projects before, never designed one.

I have sailboat with a light composed of two independant 12vdc white LEDs (I think they are leds) (L1 and L2 in attachment).

I have a SPST switch S1 that should turn on both lights, and a SPST switch S2 that should turn on only L2.

I propose to insert a diode D1 as shown to prevent L1 from turning on when S2 is closed.

Will this work? Do I need anything else? :confused:

For a 12VDC (car battery) what Diode would D1 need to be to handle the power?

Thanks!
kpg

PS - I know this can be done with a DPDT switch and wiring only, but I need it to go through a fuse panel with only SPST switches.
 

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KMoffett

Joined Dec 19, 2007
2,918
Yes, it will work. What is the wattage of L2. That will determine what diode will be needed.

The two SPST switches could be replaced with one SPDT/Center-OFF switch.

OOPS, missed the PS

Ken
 
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