Project 1.1.7: Car front and rear lights
| Description | This project shows how to turn on four LEDs at the same time using an Arduino Uno. It introduces the control of multiple LEDs using different Arduino pins. |
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| Use case | This project imitates car lights, where two front lights and two rear lights turn on together at night. |
Components (Things You will need)
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! Resistor |
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Building the circuit
Things Needed:
- Arduino Uno = 1
- Arduino USB cable = 1
- LED = 4
- Jumper Wires
Mounting the component on the breadboard
Mounting the component on the breadboard
Step 1: Place the four LEDs on the breadboard. For each LED, the longer leg is the positive pin, while the shorter leg is the negative pin.
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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
Step 2: Connect the positive leg of the first LED to pin 6 on the Arduino through a 220Ω resistor. Connect its negative leg to GND
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Step 3: Connect the positive leg of the second LED to pin 5 on the Arduino through a 220Ω resistor. Connect its negative leg to GND.
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Step 4: Connect the positive leg of the third LED to pin 4 on the Arduino through a 220Ω resistor. Connect its negative leg to GND.
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Step 5: Connect the positive leg of the fourth LED to pin 3 on the Arduino through a 220Ω resistor. Connect its negative leg to GND.
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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);
pinMode(3,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);
digitalWrite(5,HIGH);
digitalWrite(4,HIGH);
digitalWrite(3,HIGH);
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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
CONCLUSION
This project helps learners understand how to control four LEDs using Arduino. It is a simple introduction to car lighting systems, multiple outputs, and synchronized LED control.