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All we need to do is upload the code from this page and watch the LED react to our commands. This is a good time to take a look at the code and comments to start to get a feel for how it works. Change the two “delay” values and upload it again to see how the flashing pattern changes.
Step 1: Connect your UNO to your computer with the USB cable. Congratulations, you have just created and run your first UNO project.
Code:
//------------- Code Starts Here ---------------------------- //----------------------------------------- //Published by IntroductionToArduino.com //Created by Paul Illsley (www.paulillsley.com) //Please use and share so others can enjoy //----------------------------------------- void setup() { // setting pin 13 (the LED) as an output (this is the pin for the UNO's on-board LED). pinMode(13,OUTPUT); } void loop() { // setting the voltage of pin 13 to HIGH (5 volts), the LED turns on digitalWrite(13,HIGH); // delay 1000 milliseconds (1 second) delay(1000); // setting the voltage of pin 13 to LOW (0 volts), the LED turns off digitalWrite(13,LOW); // delay 1000 milliseconds (1 second) delay(1000); } //------------- Code Stops Here ----------------------------
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