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Topic: how to amplify Simple SD Audio? (Read 1 time) previous topic - next topic


@Tuttut - The input to the amplifier shows it already going through a pot so thee is no worry about the input being too high.

Coupling the arduino output through a capacitor is however a good idea.
The circuit shown only a 220uF capacitor across the supply, I would recommend at least a 1000uF.

Make sure the ground of this circuit is connected to the ground of the arduino.



Double check that your capacitors are the right way around as well

Duane B



Looks like the problem was a dry joint on one of the caps in the amp circuit - it's working perfectly now :-)  I also reduced the input signal to the amp by running the audio output pin through a cap, resistor and then tying it to ground via another resistor.  works a treat now.  Thanks for the help folks!

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