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Does this connection make any sense?
chupocro:
I am looking at the connection examples of some toggle switch from AE which has two indicator LEDs and can't see any sense in connecting the NO contact to the cathode of the green LED as in the connection diagram in the picture I marked with the red arrow.
Can anyone spot any reason why would one want to make such a connection which connects battery plus with the green LED's cathode?
AVGresponding:
Who says it's connected to the cathode? It's more likely it's connected to the anode, and the cathode is common with that of the red LED, and that the diagram merely shows the connections for OFF=GREEN ie the device being controlled by the switch is "safe".
Or it could just be wrong, it does happen.
tooki:
--- Quote from: AVGresponding on April 05, 2024, 05:38:47 am ---Who says it's connected to the cathode? It's more likely it's connected to the anode, and the cathode is common with that of the red LED, and that the diagram merely shows the connections for OFF=GREEN ie the device being controlled by the switch is "safe".
--- End quote ---
Ummm… the datasheet shown? On the bicolor LED model, the drawing clearly shows the “LED:+” pin, then “LED:G” and “LED:R” pins instead of the “LED:-” pin shown on the single-LED model. Since LED+ is the anode, and there’s only one, it has to be the common, meaning the cathodes are separate.
tooki:
--- Quote from: chupocro on April 04, 2024, 08:24:39 pm ---Can anyone spot any reason why would one want to make such a connection which connects battery plus with the green LED's cathode?
--- End quote ---
It doesn’t make any sense at all. There’s no way for current to flow.
AVGresponding:
--- Quote from: tooki on April 05, 2024, 11:38:22 am ---
--- Quote from: AVGresponding on April 05, 2024, 05:38:47 am ---Who says it's connected to the cathode? It's more likely it's connected to the anode, and the cathode is common with that of the red LED, and that the diagram merely shows the connections for OFF=GREEN ie the device being controlled by the switch is "safe".
--- End quote ---
Ummm… the datasheet shown? On the bicolor LED model, the drawing clearly shows the “LED:+” pin, then “LED:G” and “LED:R” pins instead of the “LED:-” pin shown on the single-LED model. Since LED+ is the anode, and there’s only one, it has to be the common, meaning the cathodes are separate.
--- End quote ---
Yeah, I agree, it's implied. Note to self: no posting before fully waking up in the morning!
Depending on the PIV of those LEDs, it might well light the red one with enough voltage...
In fact, at 220VAC, it'll be lighting them both. For a short time...
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