Chapter 9
Arduino audio control
This chapter focusses on the design and construction of a more significant project – an Arduino-controlled audio amplifier with 2-band equalizer. This project combines elements of your learning from previous chapter projects in this book:
1.Chapter 5 – making decisions based on control inputs (i.e. switches and piezoelectric sensors)
2.Chapter 7 – amplifying an audio signal (using the LM386 to drive a loudspeaker as an output actuator)
3.Chapter 8 – filtering an audio signal for amplification (the 2-band equalizer amplifier circuit)
The final system uses digital (push button) and analogue (potentiometer) control inputs to change the state and data of the system; this requires adding nested selection statements ...
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