How to add a LED that's always on...

[Renegadrian]

Let's say in the classic 3PDT-battery-adapter configuration, like the GGG layouts...
Like THIS

I'd like to add on a circuit (that's going to be always powered via an adapter) a LED that's always lit when the input jack is plugged...How should I wire it?!

Also,  what should be the its resistor value to make it last the longest time?!

[searoad]

u dont need the battery snap right?
take off the black wire from led(-) and connect it to the ring of input jack
and u can use a DPDT instead of 3PDT

[Renegadrian]

For what I understood, the ON/OFF LED will be no more that way, am I right?!
My goal is to have the classic configuration with the 3DPT and the ON/OFF LED, and a LED more that's always lit when input jack is plugged...

[hendrix2489]

i think it might look like this, http://www.flashpaint.com/sketchit.php?id=3689

whoops 2 people posted while i was making that masterpiece, sorry

[Renegadrian]

Mmm,ok, where's the other LED then?!

[theundeadelvis]

Couldn't you just wire the LED to the DC jack with a resistor between the positive lead and the lack?

[searoad]

sorry i misunderstood...
so just add another led
ring of input jack---- (-) another led (+) --- (+) indicator led --- 4k7 resistor --- +9v
or
ring of input jack---- (-) another led (+) --- another resistor --- +9v

[Renegadrian]

All right  thank you for your advices! 

[arma61]

Ciao

I think this is what you are looking for, as soon as you connect the input jack the new led gets "ground", and it's already connected to the positive.



Ciao
Armando

[Renegadrian]

Grazie Armando!