Lights and Sound

Robotics 8 | AY '22-'23

Lights &

Week 4

SOUND

Programming Piezo to play a note with Integration of LEDs

Re cap

last week

Playing musical note with piezo

• Physics of sound
• tone() function's 3rd parameter
• sound [note] = frequency
• note types to duration
• Identifying letter note in the music sheet
• programming piezo to play specific note

Activity

Let’s try to convert these note into a program - let’s recall the process that we did:

• Identify the letter notes in the music sheet
• Identify its equivalent frequencies
• Identify the note type
• Identify its equivalent duration
• Multiply the duration to 1.3 to come up with the value for the delay
• Input the values in the tone() function and delay() function

Do this!

warm up

+ link

activity

Next once we have completed the circuit [take note of your pin connections for programming] – we will now program the 4 notes with the details that we have - frequencies, durations and delay values.

.We will write the code for tone() functions inside the void setup() instead as we want the Arduino to play the melody once

LED + Piezo

Circuit

+ CODE

do this!

Modify the code | Add LED

Modify the program and let the RED led blink when a note is playing - note that LED should not light up when the piezo is not playing any sound.

modify

Analyze

With the modified code - how did LED blink? Discuss the sequence in which the codes flow and work.

Continue...

Lights and Sounds

Continue to complete the melody by converting the notes to frequencies, and duration [dont forget to compute the delay value] and add different light sequence in the program

PT#1

+ table

+ melody