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Our Tenth Lab: Using a Buzzer with PWM

Parts for this Lab are in Bag 10

  1. Place the buzzer from Bag 10 with the positive pin (marked with a plus sign) in h30
  2. The other pin should line up into f28
  3. Using one of the jumper wires in Bag 10, insert one end to j30 and the other end into j20

  4. Using one of the jumper wires in Bag 10, insert one end to j28 and the other end into a18

  5. When you are finished, your breadboard should look similar to the image below (Note: your wires may be different colors)

Lab 10

Using a Buzzer to Make a Sound

  • We already know how to use PWM to make an LED glow brighter or dimmer.

  • We can use the same PWM principal to make a sound with a piezo buzzer.

Challenge

  • Using what you learned in the previous labs, do the following:
    • Set up GP 16 as a PWM pin
    • Set the frequency to 1,000 Hz
    • Set the duty cycle to 50%
    • Wait 5 seconds
    • Then set the duty cycle to 0 to turn off the sound
    • Don't forget to comment your code!