I will show you how to add an alarm to a box to frighten people who try to look inside. ;) Parts BreadboardSpeaker (the one I am using is a Mastertone 8 ohm speaker)Nine volt (9V) batteryBattery connecting wiresArduino (I'm using the UNO)33 ohm resistorbuttonJumper wiresBoxMasking tapeUSB connect... By: laassp13