Code Club Electronics 7
Just having a look at an Arduino add-on board, that has various inputs and outputs built in. The following code (from the default IDE library) flashes an LED on and off. The delays can be changed within the code.
/*
Blink
Turns an LED on for one second, then off for one second, repeatedly.
Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO
it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to
the correct LED pin independent of which board is used.
If you want to know what pin the on-board LED is connected to on your Arduino
model, check the Technical Specs of your board at:
https://www.arduino.cc/en/Main/Products
modified 8 May 2014
by Scott Fitzgerald
modified 2 Sep 2016
by Arturo Guadalupi
modified 8 Sep 2016
by Colby Newman
This example code is in the public domain.
https://www.arduino.cc/en/Tutorial/BuiltInExamples/Blink
*/
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(100); // wait for 100 milli seconds
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
delay(100); // wait for 250 milli seconds
}
The video just shows the last section of code and what happens when the delay is changed.
Timings are in milliseconds or seconds
e.g. 1000 ms = 1 second 2000 ms = 2 seconds 100 ms = 0.1 seconds 250ms = 0.250 seconds (¼ second) 500ms = 0.500 seconds (½ second)
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