Here I begin a massive tutorial on Arduino and Electronics! In this first video I cover Arduino Basics, Electricity, Ground, Voltage, Current, Resistance, Power, Protecting Components, LEDs, Breadboards, Arduino Coding, Ohm’s Law, Generating Different Voltages with Arduino, 2 Circuits and much more.

Like always the code I use follows the video below. The kit I’m using for the tutorial is here.

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Code from the Video

ARDUINO DEMONSTRATION

// Create a constant thats value will never change
// This will represent pin 3 in our code
const int outPin = 3;

// Runs once to set important values and define rules
void setup() {

  // State that pin 3 will be used for outputting a current
  pinMode(outPin, OUTPUT);

  // Used to communicate between the Arduino and your computer
  // We wish to transfer 960 characters per second
  Serial.begin(9600);

  // Prints a message in the serial monitor
  Serial.println("Enter 1 or 0");
}

void loop() {
  // Turn the 3 pin on and off from the monitor

  // Check for the number of bytes we can read from the serial
  // port. If greater then 0 it is connected
  if(Serial.available() > 0){

    // Read input from serial monitor
    char ch = Serial.read();

    // If 1 is entered in the serial monitor turn pin 3 on
    if(ch == '1'){
      digitalWrite(outPin, HIGH);

    // If 0 is entered stop current from flowing from pin 3
    } else if(ch = '0'){
      digitalWrite(outPin, LOW);
    }
  }
}

// ----- CHANGING VOLTAGE OUTPUT USING ANALOG OUTPUTS -----

// GND to black and 3 to red Multimeter

// Pins 3,5,6,9,10 and 11 provide variable output
// They turn on and off voltage rapidly instead of just 5V

// All pulse 500 times per second except 5 & 6 which 
// pulse 980 times

// By varying how long a signal is high you can control the dimming / color
// of an LED, the speed of a motor, a voltage, etc.
const int outputPin = 3;
void setup(){
  pinMode(outputPin, OUTPUT);
  Serial.begin(9600);
  Serial.println("Enter Voltage 0 - 5");
}
void loop(){
  if(Serial.available() > 0){

    // Get the users requested voltage
    float volts = Serial.parseFloat();

    // Convert to requested voltage
    int reqVolts = volts * 255.0 / 5.0;

    // Output requested voltage from pin 
    analogWrite(outputPin, reqVolts);
  }
}