Circuit Documentation

Summary

This circuit is designed to control four traffic lights using an Arduino UNO microcontroller. Each traffic light has three LEDs (Red, Yellow, and Green) and a common ground. The Arduino UNO is programmed to control the LEDs, turning them on and off in a sequence.

Component List

Traffic Light

• Description: A traffic light with three LEDs (Red, Yellow, Green) and a common ground.
• Pins: Green, Yellow, Red, GND

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

Comment

• Description: Placeholder for comments in the circuit design.
• Pins: None

Wiring Details

Traffic Light 1

• Green: Connected to Arduino UNO pin D11
• Yellow: Connected to Arduino UNO pin D12
• Red: Connected to Arduino UNO pin D13
• GND: Connected to Arduino UNO GND

Traffic Light 2

• Green: Connected to Arduino UNO pin D8
• Yellow: Connected to Arduino UNO pin D9
• Red: Connected to Arduino UNO pin D10
• GND: Connected to Arduino UNO GND

Traffic Light 3

• Green: Connected to Arduino UNO pin D5
• Yellow: Connected to Arduino UNO pin D6
• Red: Connected to Arduino UNO pin D7
• GND: Connected to Arduino UNO GND

Traffic Light 4

• Green: Connected to Arduino UNO pin D2
• Yellow: Connected to Arduino UNO pin D3
• Red: Connected to Arduino UNO pin D4
• GND: Connected to Arduino UNO GND

Arduino UNO

• GND: Connected to GND of all Traffic Lights

Code

void setup() {
    pinMode(2, OUTPUT);
    pinMode(3, OUTPUT);
    pinMode(4, OUTPUT);
    pinMode(5, OUTPUT);
    pinMode(6, OUTPUT);
    pinMode(7, OUTPUT);
    pinMode(8, OUTPUT);
    pinMode(9, OUTPUT);
    pinMode(10, OUTPUT);
    pinMode(11, OUTPUT);
    pinMode(12, OUTPUT);
    pinMode(13, OUTPUT);
}

void loop() {
    digitalWrite(2, HIGH);
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
    digitalWrite(5, HIGH);
    digitalWrite(6, HIGH);
    digitalWrite(7, HIGH);
    digitalWrite(8, HIGH);
    digitalWrite(9, HIGH);
    digitalWrite(10, HIGH);
    digitalWrite(11, HIGH);
    digitalWrite(12, HIGH);
    digitalWrite(13, HIGH);
    delay(1000);
    digitalWrite(2, LOW);
    digitalWrite(3, LOW);
    digitalWrite(4, LOW);
    digitalWrite(5, LOW);
    digitalWrite(6, LOW);
    digitalWrite(7, LOW);
    digitalWrite(8, LOW);
    digitalWrite(9, LOW);
    digitalWrite(10, LOW);
    digitalWrite(11, LOW);
    digitalWrite(12, LOW);
    digitalWrite(13, LOW);
    delay(1000);
}

This code initializes the pins connected to the traffic lights as outputs and then enters a loop where all LEDs are turned on for one second and then turned off for one second, repeatedly.