8_1_1 Light Sensor Sets Motor Speed

Light Sensor Sets Motor Speed

Code

The code in the editor below is ready to run! Plug Code Lab Mini in to your computer's USB port, make sure that your Code Lab Mini Sensor Trio Add-On (sold separately) is attached, 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.

If you haven't set up your Code Lab Mini Sensor Trio Add-On yet, visit Chapter 0 to watch a video showing you how to do that.

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/* Use the light sensor to set the speed of the buzzer motor. A shadow over the sensor speeds up the motor, but a flashlight on the sensor makes the motor slow down. */ void setup() { pinMode(A2,INPUT); //light sensor pinMode(3,OUTPUT); //motor } void loop() { //Create a variable with a value of the reading from the light sensor int speed = analogRead(A2); //map the variable so a sensor reading of 0 becomes a value of 255 and a reading of 1023 becomes 0 speed = map(speed,0,1023,255,0); analogWrite(3,speed); //Use the variable to set the speed of the motor } // (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!

Graphic of the Map Function

Challenges

Coming Soon!