Arduino – Controlling Things
This will start you off programming!
Light Emitting Diode (LED)
The Arduino Uno
Code to blink 1 Led
(int=integer - a number , this next line is setting a variable ledPin (could be anything you want to call it) to a value)
int ledPin = 13; // LED connected to digital pin 13 (void - means run and let it keep running, setup is telling the computer what it needs to know the pin and which direction) void setup() // run once, when the sketch starts { pinMode(ledPin, OUTPUT); // sets the digital pin as output } (the body of the code, run and keep rerunning it - loop) void loop() // run over and over again { digitalWrite(ledPin, HIGH); // sets the LED on delay(1000); // waits for a second digitalWrite(ledPin, LOW); // sets the LED off delay(1000); // waits for a second }
Code to blink 2 LEDs
int redPin = 12; // Red LED connected to digital pin 12 int greenPin = 11; // Green LED connected to digital pin 11 void setup() // run once, when the sketch starts { pinMode(redPin, OUTPUT); // sets the digital pin as output pinMode(greenPin, OUTPUT); // sets the digital pin as output } void loop() // run over and over again { digitalWrite(redPin, HIGH); // sets the Red LED on digitalWrite(greenPin, HIGH); // sets the Green LED on delay(500); // waits for half a second digitalWrite(redPin, LOW); // sets the Red LED off digitalWrite(greenPin, LOW); // sets the Green LED off delay(500); // waits for half a second }
Power Transistors
Control bigger stronger components – motors, lights
They have a base, collector and emitter.
Instructible about controlling motors with an Arduino
More about the Arduino