Project Two: Blink led using Arduino board


Project Two: Blink led using Arduino board

Project Two: Blink led using Arduino board will basically get you up and blink led using Arduino board.  We assume you already understand project one: Light led using Arduino board.

Components

QuantityModule/componentDescriptionprice Range
1Arduino board (Uno)+Cablemore1200-2500/=
1Resistor Any electronics supply store10-20/=
1LED From 1k Ω to 2KΩ10-20/=
3Connecting Wires (Jumpers)learn more50/=
1Breadboard learn more150/=

Send us a request using the contact section if you don't have any.



Note: In this project, we are using 1 Resistor ( 1k resistor ), Led, Arduino pin 7 and Gnd pin to create a connection(Circuit)
Project summary
1. From led Anode pin (longer leg)
led Anode pin >>>Resistor   end >>> then the other side of the resistor end to Pin 7(Arduino)
2. From led cathode (shorter leg)
led cathode >>>Ground pin (Arduino GND)
3. Plug the power into the Arduino.
Now copy the code below and paste it Arduino IDE and upload to Arduino 4. After successful upload led should blink The LED should light up.


Note:  Will be using  /*comment goes here*/  or //comment goes here as comment

More about comment

Comments are lines in the program that are used to inform developer or others about the way the program works. Comments are ignored by the compiler, in this case, we are using Arduino IDE as a compiler.



project code

/*Author: orengo Dickson */
 /* Date Written: 17 March 2020 *
Description: *Turns an LED on for one half second, then off for one-half second repeatedly*/

const PinLed =  7;  // Pin Definitions
/**Function Name: setup */
*Purpose: Run once when the system powers up.*/
void setup()
{
pinMode(PinLed, OUTPUT);
}
/**Function name: loop
*Purpose: Runs over and over again, as long as the Arduino has power*/
void loop()
{
digitalWrite(PinLed, HIGH);
delay(500);
digitalWrite(PinLed, LOW);
delay(500);

Your final code without comments should look like as follows:



const PinLed =  7;
void setup()
{
pinMode(PinLed, OUTPUT);
}

void loop()
{
digitalWrite(PinLed, HIGH);
delay(500);
digitalWrite(PinLed, LOW);
delay(500);


altering the code

By altering the code for the delay you can create something a little more interesting

You can also replace above code with this one
/*blinks faster, then slower.*/
const int PinLed = 7; //   led  connected to pin 7
voidsetup()
{
pinMode(PinLed, OUTPUT);
}
int delayTime = 1000;
void loop()
{
while(delayTime > 0)
{
// while delayTime is greater than 0
digitalWrite(PinLed, HIGH);
delay(delayTime);
digitalWrite(PinLed, LOW);
delay(delayTime);
delayTime = delayTime - 100;

}
while(delayTime < 1000)
{
// while delayTime is less than 1000
delayTime = delayTime + 100;
// do this first so we don?t have a loop with delayTime = 0
digitalWrite(PinLed, HIGH);
delay(delayTime);
digitalWrite(PinLed, LOW);
delay(delayTime);
}
}







        Need help? please contact us

Comments

Post a Comment

Popular posts from this blog

Arduino function libraries~Math Library Function

  Arduino Math Library Arduino Math library includes a number of useful mathematical functions for manipulating floating-point numbers. Functions are defined in the header math.h #include < math.h > double cos (double __x) // returns cosine of x double fabs (double __x) // absolute value of a float double fmod (double __x, double __y) // floating point modulo double modf (double __value, double *__iptr) // breaks the argument value into // integral and fractional parts double sin (double __x) // returns sine of x double sqrt (double __x) // returns square root of x double tan (double __x) // returns tangent of x double exp (double __x) // function returns the exponential value of x. double atan (double __x) // arc tangent of x double atan2 (double __y, double __x) // arc tangent of y/x double log (double __x) // natural logarithm of x double log10 (double __x) // logarithm of x to base 10. double pow (double
Read more

Project Four: Pattern, Blink 4 leds using Arduino board

Image
Project Four: Pattern,  Blink  4 leds using Arduino board Project Four: Pattern,  Blink  4 leds using Arduino board will basically get you up and blink four leds using Arduino board in pattern. i.e Mpesa Display Components Quantity Module/component Description price Range 1 Arduino board (Uno)+Cable more 1200-2500/= 4 Resistor Any electronics supply store 10-20/= 4 LED From 1k Ω to 2KΩ 10-20/= 14 Connecting Wires (Jumpers) learn more 50/= 1 Breadboard learn more 150/= Send us a request using the contact section if you don't have any.     Note: In this project, we are using 4  Resistors ( 1k resistor ), 4 Leds, Arduino pin 5, Pin 6, Pin 7, Pin 8 and Gnd pin to create a connection(Circuit) A good example is the one in the picture below 1. Connect ground fr
Read more

Arduino - Strings

  Arduino - Strings Used to store text. also can be used to display text on an LCD (Liquid Crystal Display) or in the Arduino IDE Serial Monitor window. Example: void setup() { char arduino_str[6]; // an array for a 6 character string Serial.begin(9600); arduino_str[0] = 'H'; // the string consists of 5 characters ( HELLO ) arduino_str[1] = 'E'; arduino_str[2] = 'L'; arduino_str[3] = 'L'; arduino_str[4] = 'O'; arduino_str[5] = 0; // 6th array element is a null terminator Serial.println(arduino_str); } void loop() { } The following example shows what a string is made up of; a character array with printable characters and 0 as the last element of the array to show that this is where the string ends. The string can be printed out to the Arduino IDE Serial Monitor window by using Serial.println() and passing the name of the string. This same example above can be written in a more convenient way as shown below Example vo
Read more