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>> Home > Forum > Electrical Related > fitting LED to existing on/off switch wiring
fitting LED to existing on/off switch wiring
(588 views)
Author Message
octman
(Captain)





Forum Posts: 97
28th Nov 2016 09:51  
>> Permalink
mdlbt.com/24528

My model has an existing on/off switch wired into the hull going from the battery via the switch to the receiver, as normal. I want to fit an LED into this wiring to show it is switch on, and have seen pictures of one fitted to the rear of the switch, but unfortunately the actual connections have been covered over by insulation. All that I can deduce is the the LED connection are made at the rear of the switch, or thereabouts. The connections to the battery and receiver and all the cables to the switch are untouched. All there is are the 2 connectors on a few inches of cable from connectors, to the switch and a fly lead coming from the switch to the LED. Obviously the supply to the LED is no problem, connected to the output from the switch,a simple SPST on/off type, but where would the earth be attached? Can it simply be tapped into the black connector going to the receiver, which I believe is the negative? All very simple I know but I want to do it right, and I hate making too much smoke as it melts!

Dave M
(Fleet Admiral!)





Forum Posts: 1356
28th Nov 2016 10:17  
>> Permalink
mdlbt.com/24530

Hi Chris
Many Rx switches just switch the red ( ) supply and don't break the black (-) wire. If your LED is connected to the RX side of the ( ) red wire then you need to make a connection to the (-) black wire. I am assuming your LED has a resistor in circuit as it will smoke if you put more than 3v across its terminals 😓
Hope this helps
Dave


Live long and prosper

Dave
octman
(Captain)





Forum Posts: 97
28th Nov 2016 12:56  
>> Permalink
mdlbt.com/24533

thanks Dave, will give it a go.
Chris

octman
(Captain)





Forum Posts: 97
29th Nov 2016 18:46  
>> Permalink
mdlbt.com/24561

Thanks again Dave, worked a treat.

Chris

Dave M
(Fleet Admiral!)





Forum Posts: 1356
29th Nov 2016 19:31  
>> Permalink
mdlbt.com/24564

Glad it didn't smoke!
Dave


Live long and prosper

Dave