I want to take 3.5mm jack output to speaker for a baby phone application. But I'm not able to find any solution for connecting a small external speaker to an audio codec board.

I tried connecting 2 watt speaker but I'm not able to drive it.

Can anybody send me circuit diagram to connect class D amplifier to 3.5mm jack?

  • My guess is that the RPi doesn't put enough power out to properly drive a 2W speaker without an external power source.
    – Jacobm001
    Commented Aug 6, 2017 at 20:39

1 Answer 1


Here you can find the signal configuration in the 3.5mm audio jack:


And more information about the electrical specification:

What are the specifications for the audio output?

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