This second volume of the ­Arduino Project Handbook delivers 25 more ­beginner-friendly electronics projects. Get up and running with a crash course on the Arduino, and then pick any project that sparks your interest and start making! Each project includes cost and time estimates, simple instructions, colorful photos and circuit diagrams, a troubleshooting section, and the complete code to bring your build to life. With just the Arduino board and a handful of components, you’ll make gadgets like a rainbow light display, noise-level meter, digital piano, GPS speedo­meter, and fingerprint scanner. This collection of projects is a fast and fun way to get started with microcontrollers that’s perfect for beginners, hobbyists, parents, and educators.25 Step-by-Step ProjectsLED Light BarLight-Activated Night-LightSeven-Segment LED Countdown TimerLED Scrolling MarqueeMood LightRainbow Strip LightNeoPixel CompassArduino PianoAudio LED VisualizerOld-School Analog DialStepper MotorTemperature-Controlled FanUltrasonic Range FinderDigital ThermometerBomb Decoder GameSerial LCD ScreenUltrasonic People CounterNokia 5110 LCD Screen Pong GameOLED BreathalyzerUltrasonic SoakerFingerprint ScannerUltrasonic RobotInternet-Controlled LEDVoice-Controlled LEDGPS SpeedometerUses the Arduino Uno board