How To Make A Traffic Light Circuit



Traffic lights are a crucial part of keeping roads safe, but have you ever wondered how they work? Making a traffic light circuit is a fun and educational activity that can help you understand the intricacies of electrical engineering. In this article, we'll walk you through the steps needed to create a working traffic light circuit of your own.

To start, you'll need some basic supplies such as an Arduino microcontroller board, a 9-volt battery, some LEDs (light-emitting diodes), resistors, transistors, connectors, and wires. Once you have everything you need, you can begin to assemble your circuit. Start by connecting your LEDs to the Arduino board, making sure to note which color LED you are connecting to the appropriate connection. Next, attach resistors to ensure that the LEDs are not overloaded with power. Once these have been connected, add the transistors. These will act as switches to turn the LEDs on and off as you cycle between colors.

Finally, it's time to put the finishing touches on your circuit. Connect the 9-volt battery to the Arduino board, followed by the connectors for each of the LEDs. After everything is connected, make sure the proper current flow is present by using a multimeter to test the continuity of the circuit. When you're satisfied, use your programming skills to design the custom code to control the switching of the LEDs. When you have the code written and tested, you can connect the circuit to your breadboard and connect the power supply. Your traffic light circuit should now be ready to go and its green, yellow, and red lights will be able to direct the flow of traffic as intended.

Creating a traffic light circuit is a great way to become acquainted with the fundamentals of electrical engineering and coding. With some patience and dedication, you can build a circuit that can serve the same purpose as any traffic light in major cities. So next time you are stuck waiting at a red light, you will know exactly what is happening inside the wiring and circuitry.


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