WEEK 3

• voltage changes - sound of speaker change
• delay - give sounds time to vibrate
• run one thing per time for microcontroller
• Serial.begin(9600) - agree communication
• analog pin -
• wire wrapper

WEEK 4

• sound by arduino is not
• smooth tone: start from equal time gap, then try to shift it, small delay might better
• plotblock
• using gear for motor (more power)
• tone change by voltage changing

WEEK 5

• Using a cut cable to connect
• build light sensor into a tube, so only detect things on it
• how to mount, where to mount