Week #6 - Journal

I’ve always been curious about how a traffic light works.

Now, with just an Arduino, a breadboard, and a few simple LEDs,

I decided to recreate it myself.

It’s a small project, but a big reminder: with curiosity and simple tools, you can bring any idea to life.

what I used to  simulate the circuit in real life  : 

• I connected Arduino GND to the breadboard ground.

• I connected the positive leg of the LEDs to Digital Pins 2, 3, 4, 5.

• And then I added press button on pin 8 to as an INPUT  to control the circuit . 

• I connected the buzzer with pin 6 for the positive leg , for the negative it was connected to the Arduino GND 

• I connected resistors from the negative leg of each LED to the breadboard ground.

• I set all my pins as OUTPUT in the code.

• I uploaded the code via Arduino IDE to make the board run it.

• I set up the breadboard, Arduino, LEDs, resistors, and wires

• I connected Arduino GND to the breadboard ground.

• I connected the positive leg of each LED to Digital Pins 2, 3, 4, 5.

• I connected the buzzer to the pin 6 

• I connected resistors from the negative leg of each LED to the breadboard ground.

• I connected the Arduino to my computer and uploaded the code via Arduino IDE.

• Once everything worked, I took a clear photo of all the connections, showing the wires and components.

• When I tried to run the Arduino, the buzzer  didn’t make a sound 

• I realized the buzzer  GND was connected in a  wrong way 

• Because of that, no power reached the buzzer 

• I moved the wire to the correct ground, and everything worked fine.

• Learning to control LEDs with Arduino pins → each color/button works independently.

• Using resistors → protects LEDs from too much current.

• Setting pins as OUTPUT in code → lets me control each LED programmatically.

• Adding a press button on pin 8 as a n INPUT to control my circuit. 

• Uploading code and testing → ensures everything works before building the final box.