This circuit is designed around an Arduino UNO microcontroller and is used to control six green LEDs. Each LED is connected to one of the digital pins (D8 to D13) on the Arduino through a 200 Ohm resistor. The purpose of the resistors is to limit the current flowing through the LEDs to prevent damage. The circuit includes a simple control mechanism implemented in the Arduino's firmware, which turns the LEDs on and off in a sequential manner. Additionally, the Arduino is programmed to initialize serial communication at 9600 baud and print a message to the serial monitor upon setup.
/*
* This Arduino Sketch controls six green LEDs connected to digital pins 8 to 13.
* It uses DDRB and PORTB registers for efficient pin control.
* Additionally, it initializes serial communication and prints a message.
*/
void setup() {
// Set pins 8 to 13 as outputs using DDRB register
DDRB = B00111111;
// Initialize serial communication at 9600 baud
Serial.begin(9600);
// Print a message to the serial monitor
Serial.println("LED control initialized.");
}
void loop() {
// Print the state of pins 8 to 13 to the serial monitor
Serial.println(PINB,BIN);
// Turn on LEDs connected to pins 8 to 13
PORTB = B00111111;
delay(1000); // Wait for 1 second
// Turn off LEDs connected to pins 8 to 13
PORTB = B00000000;
delay(1000); // Wait for 1 second
}
The code is written for the Arduino UNO and is contained in a sketch file. It initializes the digital pins 8 to 13 as outputs and sets up serial communication. In the main loop, it toggles the LEDs on and off every second and prints the state of the pins to the serial monitor.