Mini Metal Speaker w/ Wires - 8 ohm 0.5W (ADA1890)

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Listen up! This tiny 1" diameter speaker cone is the perfect addition to any small audio project where you need an 8 O impedance and will be using 0.5W or less of…

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Hi,
I was hoping to create a small device that connects to my car’s 5v USB input. When the car is switched on it would play sound A, and when the car is off, it would play sound B. I would also like to be able to manually switch this device off.

From some basic research,
I have come to my understanding I would need a DFPlayer, an Arduino nano, a small capacitor, a speaker, potentially some form of ignition sensing wire, an on/off switch and some housing to have it all in.

Is this something you could assist with seeing if the above items are appropriate in achieving this goal? Is there anything I am missing? Any recommendations and tips would be greatly appreciated too.

Kind regards,
Stefan

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Hi Stefan
Welcome
One problem I see here is the USB outputs in the car are probably OFF with the ignition.
To do this you need an “always ON” supply which might entail some hacking into the car’s wiring.
Not the recommended thing to do in the modern car if you don’t know what you are doing I think.

Just why would you want to do this? There are usually plenty of indications to show the ignition status. With my car if you leave the vehicle with the key in the switch it lets you know in no uncertain terms.
Cheers Bob

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Hey there, @Stefan310403,

If you’re just doing it for the fun of mucking around, it could definitely be a fun project.

Realistically, though, you’re going to need some form of battery to power so this will run when the car is turned off. You could use a rechargeable battery that the car can charge while the system is powered on, although that might add more parts than you’re intending to use.