Date: 9/29/2021

Week 4 sept 29

• My Project idea
  • Some kind of musical instrument. Perhaps an Ocarina.
  • Push on some force sensitive resistors
    • This will cause LED’s to light up
    • This will also cause a speaker to play a tone, based on which FSR you push
    • The amount of force you press will cause a brighter or dimmer light to press
  • Think about how to make this more critical/complicated
  • Work with Isaiah
  • Additional thoughts
    • Think about library for an Ocarina
  • Remember, I = VR. To be able to determine resistors to use.
• Other classmates’ project ideas:
  • Hand (gyroscope, etc)
  • Drum set
  • Screaming painting (have some kind of sensors)
    • Article will be shared for distance sensor
  • Roller skates
    • With some kind of sensor, and other things
  • Box that you touch the buttons
    • Almost like simon says
    • Servos to open and close the door
  • Start the project early!
  • other tips:
    • fully document / take a video
    • come into office hours
    • bring your project for the next class
  • Part 2: Discuss the Labs
    • Make sure to get the right component
    • T120, with 5V would work
    • Do the class 3 quiz!!!
    • Shorting the servo: USE A DIODE!!!!
    • What did we use for Servo motor:
      • Use a servo library
    • How did we change volume of speaker
      • Analogwrite
      • Resistor
    • How do we change dim of led
      • Analogwrite
    • Oscilloscope
      • When volt is higher, light is brighter
      • Analogwriting in digital, how can we do that
        • PWM helps simulate the analog.
          • For example, to make it 100%, its always 3.3V
          • If we want 50% brightness, we can have it half and half at 3.3V and 0V
          • And other brightness values are different other kind of proportions of such a thing
          • ~ tilde sign has specification of PWM.
        • Trying digital write
          • Its more honest, just clear blink on and off
        • Potentiometer
          • Changes the frequency
            • Expands and narrows down the graph
          • Distance
            • infrared light
              • The further away something is, how long the light takes to get back to the sensor, it will know the distance
            • Ultrasonic sensor
              • Uses echolocation
              • Not influenced by light, but the hardware is imperfect
            • There are narrow and wide view versions of both the aforementioned distance sensors
              • Time of flight sensors are examples of very narrow
              • Ultrasound and IR are very wide view
            • PIR sensors have very wide range
              • Used for something like when someone walks into a room.
              • They wont know how close you are to it, but they’ll respond to any warm bodies. It is sensing things that are emitting warmth
              • Very basic PIR just senses if there’s motion or not
              • More advanced PIR sensors can adjust sensitivity and range. And amount of motion in a room
            • Presence PIR
              • Break beam sensor
              • These are commonly two part sensors. One is emmiter, and the other is a receiver.
              • Often used for things like elevator doors, or deli shop entrances
            • Electromagnetic wave
              • Intangible sensors take advantage of the waves we cant see