4_12 digitalWrite a digitalRead

digitalWrite a digitalRead

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 reading from a button to determine the on/off status of an LED*/ void setup() { pinMode(8,OUTPUT); //LED light pinMode(4,INPUT_PULLUP); //Button } void loop() { digitalWrite(8,digitalRead(4)); //Use the digitalRead of the button to determine if the LED is on or off //Note:the digitalRead of a button is normally HIGH, and when it's pressed the digitalRead is LOW } // (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 another LED that also uses digitalRead(4) as the second argument in the digitalWrite function. Before you upload, predict: do you think the second LED will act exactly the same as the first?