IEEExCUMake Arduino Workshop
Provided files: LED Die and Ultrasonic Sensor Interface
Additional Resources:
Ultrasonic sensor http://howtomechatronics.com/tutorials/arduino/ultrasonic-sensor-hc-sr04/
Piezo buzzer https://learn.sparkfun.com/tutorials/sik-experiment-guide-for-arduino---v32/experiment-11-using-a-piezo-buzzer https://www.arduino.cc/en/Tutorial/PlayMelody