Line Level output - NANO V3

Other Hardware Audio
1

Hello Everybody,

I'm trying to generate a very specific line level output from a Nano V3 but as the signal will be 0V to +5V, I need to convert it to an alternative one from -2V to +2V to feed my amplifier.

The output comes from the "tone" of the Nano.

I've already check on the website but didn't manage to find an answer.

Thanks you all for helping me.

Regards !

2

You can remove the DC by using a capacitor between the Nano output and the amplifier. Then it would be roughly +/- 2.5V. If that's too much you could attenuate it with a resistor divider, or you could use a potentiometer if you want it to be adjustable

3

Thanks a lot Dave.

I knew that already, but as I'm building a prototype, I just want to add a premounted PCB to my set.

Do you know if such a device, like a DAC, exists in the arduino universe ?

4

I was drawing this before I saw your reply, so FWIW this was my idea:

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I don't know enough about why you prefer a module, rather than wiring it as shown above. The capacitor could be soldered to the pot, and even with a module you'd still need wires to the module from the Nano / from the module to the amp.

You can maybe find a DAC module to do what you want, but first perhaps explain why you think that would be an advantage?

5

I'd rather use a build than to do it myself because I'm not a great solderer and I'd like to make it easier.

6

I wasn't able to find anything suitable by Googling "arduino module tone output to amplifier input".
You could get a DAC module, but I'm not sure how you'd imagine using that with a 1 bit output from tone(). Maybe someone else reading this will be able to offer a solution that fits your requirements

7

Thanks a lot, I think I'm going to add those extra components to my circuit.

8

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