QB095 Traffic Light Module

1.Product Introduction

The traffic light module integrates three different color LEDs: red, yellow, and green. It has four pins, one of which is a common pin, and the other three pins control the operation of three different color LEDs. The common GND is connected to the GND port of the development board, and the R, Y, and G pins are connected to different I/O ports of the development board. When each R, Y, and G pin inputs a high level, the corresponding color LED will light up.

Application reference: Traffic lights, indicators, etc.

2.Parameter Specification

Parameter	Value//Description
Operating voltage	3.3V~5V
Operating temperature	-40°C~+70°C
Output signal	Digital signal
Size	4.8cm*2.4cm

3.Wiring Diagram

Hint

Expansion board is attached to esp32 controller board.

Traffic Light Module	UNO
G	0
Y	2
R	14
GND	GND

4.Sample Code

#define R 14  //Define the pin for the red light of the traffic light
#define Y 2   //Define the pin for the yellow light of the traffic light
#define G 0   //Define the pin for the green light of the traffic light

void setup() {
  pinMode(R, OUTPUT);  //Set the red light pin to output mode
  pinMode(Y, OUTPUT);  //Set the yellow light pin to output mode
  pinMode(G, OUTPUT);  //Set the green light pin to output mode
}

void loop() {
  Traffic_Light(0, 0, 1);  //Green light on
  delay(2000);             //Delay 2 seconds
  Traffic_Light(0, 1, 0);  //Yellow light on
  delay(1000);             //Delay 1 seconds
  Traffic_Light(1, 0, 0);  //Red light on
  delay(3000);             //Delay 3 seconds
}
//Define traffic light color control function

void Traffic_Light(int r, int y, int g) {
  digitalWrite(R, r);
  digitalWrite(Y, y);
  digitalWrite(G, g);
}

5.Test Result

When you have successfully connected the circuits according to the wiring diagram and successfully uploaded the correct program, your traffic light will be green for 2 seconds, yellow for 1 second, and red for 3 seconds.

6.Related Resources

PDF and Code

7.Get One Now

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