Think he maybe only at the test stage though with Leds and a small battery, not sure what the final project is but seems to involve 1 speaker and 2 sources, still none the wiser from the above post
12v 2ch 433 RF Relay - Wiring Question…
- Thread starter twixx
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Agreed - but, if I understand correctly (maybe not
), he's saying that it is now working to his satisfaction, and nothing has blown up or been damaged.Kind Regards, John
The picture accompanying the OP's post, only showed experimentation with a test setup; using a battery as the 'speakers' and LEDs as the 'sources'.Agreed - but, if I understand correctly (maybe not
I don't think that we can safely say, that it is working to his satisfaction yet!
In short, my EV makes a horrifically loud and weird noise when reversing. Which is the law… ‘The problem’ is, this echo’s through my cul de sac when I arrive home late.
As per that forum thread I linked to. I have wired up a resistor to ‘cancel’ the noise, but because it’s not exactly pedestrian friendly… I want to have the ability to toggle the sounder…
So having the choice to switch channels/sources, between A/B, is the idea.
A, being the default, ON, via stock wiring.
B, being OFF/cancelled/routing to the resistor.
C, also this is just a learning experience…
As per that forum thread I linked to. I have wired up a resistor to ‘cancel’ the noise, but because it’s not exactly pedestrian friendly… I want to have the ability to toggle the sounder…
So having the choice to switch channels/sources, between A/B, is the idea.
A, being the default, ON, via stock wiring.
B, being OFF/cancelled/routing to the resistor.
C, also this is just a learning experience…
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I think maybe you could do that just using channel A that always defaults to the NC contact, use that for the thing to sound, when switched it changes to the NO contact, use that for no sound and connecting the resister
Just leave channel B unused
Just leave channel B unused
I wondered if I could get away with a single channel. On the basis the $200 solution/offering in the US appears much smaller, I figured it was likely a 1ch board…
Anyway.
In conclusion, thanks to your help… it worked…
Will I actually use it? Maybe, maybe not. Part of this was purely a ‘what if’ learning task
Anyway.
In conclusion, thanks to your help… it worked…
Will I actually use it? Maybe, maybe not. Part of this was purely a ‘what if’ learning task
Well done and thanks for sharing the outcome
My concern for wanting to swap both wires was based on believing you had two completely different audio sources - if both were differential amplifiers, commoning the negatives could have been a problem.
As it is, your sources are exactly the same - you've just added resistance - commoning the negatives will be fine.
If you still wanted to play, your two channels give you the option for 3 settings - if you swap the module back to 'toggle' mode:
A and B off, the default, full volume
A on, B off, reduced volume through resistor.
A on and B on, no sound...
(This is of course purely theoretical, ignoring any legislation that may exist for the prescribed volume of pedestrian warning noise, in electric vehicles!
)Out of curiosity, what is the resistance and wattage of the resistor you have chosen?
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Cheers @RandomGrinch … the problem with the third option is that if the car doesn’t detect any load, it gives an error. So one has to be selected by default…
The resistor is a 25w 4ohm Resistor.
The resistor is a 25w 4ohm Resistor.
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