Thinking about how traffic lights keep cars moving smoothly inspired me to create my Traffic Light System project with an Arduino Uno. I wanted to build a mini version that shows how lights change in order, just like the ones I see every day. It’s been fun learning how to use code and wires to make something so useful!

I used my Arduino Uno to connect three LEDs—green, yellow, and red—and wrote some code to make them light up one at a time. The green LED stays on for 10 seconds to let cars go, then the yellow LED turns on for 5 seconds to warn them to slow down, and the red LED lights up for 10 seconds to stop everything. After that, it starts over automatically because I put it in a loop in my code. I used digitalWrite and delay commands to control the timing, and the Arduino powers it all through a few wires.

I’m excited to make this project even better later! Maybe I can add a little buzzer that beeps when the lights change, or use a button to pause the cycle. I could also try making the yellow light shorter or longer to see how it feels. I’m happy I’m learning how coding and lights work together with my Arduino Uno, and I can’t wait to show my friends how my traffic lights keep tiny cars in line!