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Old 23-05-2022, 10:10   #1
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Indicator Light Installation

Iím installing a 12 V circuit to run a solenoid on the propane tank from an existing simple panel switch in the galley that has a fuse for each circuit, and smartly am thinking of ways to install an indicator light. I was looking at the Blue Sky LED indicator lights, and wondering how I could use one. Not having a Blue Sky panel that uses these lights, I am Ďin the darkí on how the wiring is done. I presume I need a resistor of some size which is wired in parallel with the circuit to the solenoid? Should I give up and find a small red incandescent indicator that I can wire in series and put somewhere?
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Old 27-05-2022, 15:15   #2
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Re: Indicator Light Installation

No need to go with an incandescent. LED's need to be wired with the correct polarity and with a current limiting resistor but that is easy enough. If you get the polarity backwards it generally will not harm the LED, it just won't light.

The BlueSea Indicator LEDs appear to have a resistor built in, so you don't need to worry about picking the right size resistor. Just wire the polarity correctly and you will be good to go.
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Old 27-05-2022, 15:54   #3
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Re: Indicator Light Installation

There are many cheap 12 volt Led indicators that will work fine if out of the weather. Try autozone etc.
If needing weatherproof then maybe the marine focused outlets.
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Old 27-05-2022, 16:10   #4
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Re: Indicator Light Installation

If you can figure out the make/size of the current switch my preference would be to replace the switch with a version that has a built-in indicator light. Cleaner and easier to my mind, YMMV.

If not, put the light in parallel, then no special circuitry required, any 12V light/LED that fits and strikes your fancy can be installed.
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Old 27-05-2022, 18:44   #5
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Re: Indicator Light Installation

Quote:
Originally Posted by Sonosailor View Post
I’m installing a 12 V circuit to run a solenoid on the propane tank from an existing simple panel switch in the galley that has a fuse for each circuit, and smartly am thinking of ways to install an indicator light. I was looking at the Blue Sky LED indicator lights, and wondering how I could use one. Not having a Blue Sky panel that uses these lights, I am ‘in the dark’ on how the wiring is done. I presume I need a resistor of some size which is wired in parallel with the circuit to the solenoid? Should I give up and find a small red incandescent indicator that I can wire in series and put somewhere?

They make 12vdc switches with built-in indicator LED's as mentioned above...no resistors needed...instructions come with the switches. Indicator lights make more sense to me wired in parallel so a bulb does not affect or disable the rest of a circuit.



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