book

Learn Audio Electronics with Arduino

by Charlie Cullen

March 2020

Beginner to intermediate

486 pages

17h 48m

English

Focal Press

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Software tools Tinkercad LTspice Arduino IDE Equipment Arduino Uno Breadboard Switches and LEDs Resistors, capacitors and potentiometers Audio and MIDI components Other components Soldering Final component list Conclusions

1.1 Scales, symbols and equations 1.1.1 Worked example – adding voltages 1.1.2 Worked example – working with fractions 1.2 Electrical fundamentals 1.3 Tutorial – introduction to Tinkercad 1.4 Example project – getting started: an Arduino-powered LED light 1.5 Conclusions 1.6 Self-study questions
2.1 Electronic systems and transducers 2.2 Digital systems and Arduino control 2.3 Analogue to digital conversion – sampling 2.4 MIDI control systems 2.5 Audio sensors: switches, potentiometers and microphones 2.6 Audio actuators: LEDs and loudspeakers 2.7 Tutorial – working with components 2.8 Example project – sensor control of LED output 2.9 Conclusions 2.10 Self-study questions Notes
3.1 Ohm’s Law and direct current 3.1.1 Worked example – calculating a resistor value 3.2 Kirchoff’s Voltage Law: series circuits 3.2.1 Worked examples – calculating series resistance 3.2.2 Worked example – calculating series resistor voltages 3.3 Voltage dividers 3.3.1 Worked examples – voltage dividers 3.4 Kirchoff’s Current Law: parallel circuits 3.4.1 Worked examples – calculating parallel resistance 3.4.2 Worked examples – calculating parallel current 3.5 Tutorial: limiting current to protect components 3.6 Example projects: series and parallel circuits 3.6.1 Series circuit project 3.6.2 Parallel circuit project 3.7 Conclusions 3.8 Self-study questions
4.1 Microprocessor control systems 4.2 Instruction types – sequence instructions 4.3 Example project 1 – Arduino digital output 4.4 Data types – variables 4.5 Example 2 – multiple digital outputs 4.6 Functions – encapsulating code 4.7 Tutorial – how to write code part I 4.8 Example 3 – reusing code with functions 4.9 Analogue output – pulse width modulation 4.10 Example project – automatic tone player 4.11 Conclusions 4.12 Self-study questions Notes
5.1 Programming recap 5.2 Data structures and iteration – arrays and loops 5.3 Example 1 – tone array output 5.4 Working with external libraries – serial MIDI output 5.5 Example 2 – MIDI sequence player 5.6 Conditions and digital input 5.7 Tutorial – how to write code part II 5.8 Example 3 – MIDI switch controller output 5.9 Analogue input – percussion sampling 5.10 Final project: MIDI drum trigger 5.11 Conclusions 5.12 Self-study questions
6.1 Audio signal fundamentals – sine waves 6.1.1 Worked example – varying the speed of sound 6.2 AC signals – amplitude, frequency and phase 6.2.1 Worked examples – finding the instantaneous voltage of a sine wave input signal 6.3 Capacitance – storing charge over time 6.3.1 Worked example – calculating the charge on a capacitor 6.3.2 Worked example – calculating capacitive reactance for different input frequencies 6.4 Impedance – combining AC components 6.4.1 Worked examples – analysing combined resistive and reactive circuits 6.5 Tutorial: installing LTspice 6.6 Example project – AC analysis with LTspice 6.6.1 Example project – circuit 1 6.6.2 Example project – circuit 2 6.7 Conclusions 6.8 Self-study questions
7.1 Amplification 7.1.1 Worked examples – calculating decibel gain values 7.2 Semiconductors – diodes 7.3 Semiconductors – transistors 7.3.1 Worked example – simulating BJT characteristic curves using LTspice 7.3.2 Worked example – simulating a common emitter amplifier with LTspice 7.4 Operational amplifiers 7.4.1 Worked example – simulating an inverting amplifier with LTspice 7.5 DC blocking, power decoupling and Zobel networks 7.6 Example project: building an audio amplifier 7.7 Conclusions 7.8 Self-study questions
8.1 Decibels and equal loudness 8.2 Filter characteristics and Bode plots 8.3 First-order low-pass filter 8.3.1 Worked example – designing a first-order low-pass filter 8.3.2 Worked example – simulating a first-order low-pass filter using LTspice 8.4 First-order high-pass filter 8.4.1 Worked example – designing a first-order high-pass filter 8.4.2 Worked example – simulating a first-order high-pass filter with LTspice 8.4.3 Worked example – reading and writing audio files with Ltspice 8.5 Controlling audio filters 8.6 Example project – audio amplifier with 2-band equalizer 8.7 Conclusions 8.8 Self-study questions
9.1 Final project overview 9.1.1 Project components 9.2 Arduino state control 9.2.1 Worked example – Arduino state control 9.3 Arduino digital filter control 9.4 Final project – Arduino-controlled audio amplifier with 2-band equalizer 9.5 Conclusions
10.1 Future work 10.1.1 Electronics fundamentals 10.1.2 Arduino control 10.1.3 Audio electronics 10.2 Final notes

Overview

Learn Audio Electronics with Arduino: Practical Audio Circuits with Arduino Control teaches the reader how to use Arduino to control analogue audio circuits and introduces electronic circuit theory through a series of practical projects, including a MIDI drum controller and an Arduino-controlled two-band audio equalizer amplifier.