7_11 Turn Knob Motor Strength

Turn Knob Motor Strength

Code

The code in the editor below is ready to run! Plug Code Lab Mini in to your computer's USB port with the cable and hit 'Upload Your Code!' to see what it does. Change something in the code, like a delay or pin number. Try to add something new to the program - it's yours to tinker with! You can always press the 'Restore' button to return the code to the working example.

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/* Use the turn knob to control the strength of the motor */ void setup() { pinMode(A0,INPUT); //turn knob pinMode(3,OUTPUT); //motor } void loop() { int strength = analogRead(A0)/4 ; //Create a strength integer variable //The strength variable value divides the reading from the turn knob by 4, so it has a range of 0 to 255 analogWrite(3,strength); //set the motors strength equal to the variable } // (c) 2023 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense

 

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Compile errors:

Serial port monitor: Input: Send Close

 

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!

Challenges

Can you complete the challenge? Change the code in your code editor above. Upload your code to see the effect when you're finished. Complete a challenge? Check it off the list!

Add an 'if' statement so that if the strength variable is ever lower than 100, it gets set to 100.

Add an LED that rises in brightness along with the motor buzz strength. Remember that LEDs 9,10,and 11 are the only ones that can use analogWrite.