31 Dec '15, 12pm

Create a Simple Audio Player with #Arduino or #Genuino Zero, new #library and 10 bit DAC

To connect a speaker to the board you have add an amplification circuit connected between the DAC0 pin and the speaker. The amplification circuit will increase the volume of the speaker. There are many audio amplifiers available, one of the most common is the LM386 . The following scheme shows how to build the circuit using the LM386 and a bunch of components. You can supply the LM386 connecting the Vs pin with different voltages sources, like for example the +5 V present on the 5V pin of the Arduino Zero or an external 9V battery. The gain of the amplifier is given by the capacitor connected to pin 1 and 8 of the LM386 . With the 10 µF capacitor the gain is set to 200, without the capacitor the gain is 50. With the potentiometer you can control the volume of the amplifier. Warning : do not connect the speaker directly to the pins of the Arduino Zero.

Full article: https://www.arduino.cc/en/Tutorial/SimpleAudioPlayerZero

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