Turn Knob Controls Beep Delay

Code

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/* Use the turn knob to control the delay between beeps of a speaker */ void setup() { pinMode(A0,INPUT); //turn knob pinMode(A5,OUTPUT); //speaker } void loop() { int wait = analogRead(A0);//create a variable with the name 'wait' and a value equal to the turn knob reading (range of 0-1023) tone(A5,500); //play a tone of 500 hertz on the speaker plugged into port A5 delay(wait); //delay for 'wait' amount of time. This ranges from 0-1023 milliseconds noTone(A5); //stop playing a tone on port A5 delay(wait); //delay for 'wait' amount of time before starting the loop over again } // (c) 2021 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense
 

Walkthrough Video

Watch the video for a line-by-line explanation of how the example program works. Then you'll be ready to make some changes of your own!

Video Notes for Code Lab Users:

  • Your turn knob is connected to port A0 instead of port A2 as the video says.

Challenges

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Concepts

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Quiz

If you're having trouble, try to run an experimental program or look at the example code to help you find the answer.

1. Which syntax ends the entire 'void loop' function?




2. Which syntax ends a single code command?