Project 1.1.6: TRAFFIC LIGHT

Description	This is an interesting project where you program three LEDS to turn on and go off one after the other.
Use case	In our society, we do have traffic lights that help direct cars and prevent accidents.

Components (Things You will need)

Building the circuit

Things Needed:

• Arduino Uno = 1
• Arduino USB cable = 1
• White LED = 1
• Red LED = 1
• Yellow LED = 1
• Red jumper wires = 1
• Blue jumper wires = 1
• Black jumper wires = 1
• White jumper wires = 1
• Green jumper wires = 1
• Purple jumper wires = 1

Mounting the component on the breadboard

Mounting the component on the breadboard

Step 1: Take the breadboard, the white LED and insert it into the vertical connectors on the breadboard.

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NB: Make sure you identify where the positive pin (+) and the negative pin (-) is connected to on the breadboard. The longer pin of the LED is the positive pin and the shorter one, the negative PIN.

WIRING THE CIRCUIT

Things Needed:

• Red male-male-to-male jumper wires = 1
• Black male-to-male jumper wires = 1
• White male-to-male jumper wires = 1
• Blue male-to-male jumper wires = 1

Step 2: Connect one end of red male-to-male jumper wire to the positive pin of the white LED on the breadboard and the other end to hole number 6 on the Arduino UNO.

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Step 3: Connect one end of the blue male-to-male jumper to the negative pin of the white LED on the breadboard and the other end to GND on the Arduino UNO.

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Step 4: Take the red LED and insert it into the vertical connectors on the breadboard.

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Step 5: Connect one end of the black male-to-male jumper wire to the positive pin of the red LED on the breadboard and the other end to hole number 5 on the Arduino UNO.

Step 6: Connect one end of the black male-to-male jumper wire to the positive pin of the red LED on the breadboard and the other end to hole number 5 on the Arduino UNO.

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Step 7: Connect one end of the white male-to-male jumper wire to the negative pin of the white LED on the breadboard and the other end to GND on the Arduino UNO.

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Step 8: Take the yellow LED and insert it into the vertical connectors on the breadboard.

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Step 9: Connect one end of the green male-to-male jumper wire to the positive pin of the yellow LED on the breadboard and the other end to hole number 4 on the Arduino UNO.

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Step 10: Connect one end of the purple male-to-male jumper wire to the negative pin of the yellow LED on the breadboard and the other end to GND on the Arduino UNO.

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make sure you connect the arduino usb use blue cable to the Arduino board.

PROGRAMMING

Step 1: Open your Arduino IDE. See how to set up here: Getting Started.

Step 2: Type the following codes in the void setup function as shown in the image below.

pinMode (6, OUTPUT);
pinMode (5, OUTPUT);
pinMode(4,OUTPUT);

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NB: pinMode will help the Arduino board to decide which port should be activated. The code below will turn off the three light bulbs.

Step 3: Type the following codes in the void loop function.as shown in the image below;

digitalWrite (6, HIGH);
delay (1000);
digitalWrite (6, LOW);
delay (1000);   
// this codes above will turn on and of the white LED 

digitalWrite (5, HIGH);
delay (1000);
digitalWrite (5, LOW);
delay (1000);  
// this codes above will turn on and of the red LED 

digitalWrite (4, HIGH);
delay (1000);
digitalWrite (4, LOW);
delay (1000);  
// this codes above will turn on and of the yellow LED 

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_NB: To turn this LEDS off, you can change the “HIGH” in the ode into “LOW” _

Step 4: Save your code. See the Getting Started section

Step 5: Select the arduino board and port See the Getting Started section:Selecting Arduino Board Type and Uploading your code.

Step 6: Upload your code. See the Getting Started section:Selecting Arduino Board Type and Uploading your code

OBSERVATION

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CONCLUSION

In brief, the three-LED blinking project offers a hands-on introduction to coordinated LED control. By creating a blinking pattern across three LEDs, participants gain insights into circuit connections, programming loops, and synchronization. This endeavor serves as a stepping stone for more complex electronics undertakings while illustrating the concept of repetitive actions, sparking interest in practical electronics applications.