Arduino Based 3-Way Traffic Light Controller
Arduino Based 3-Way Traffic Light Controller
We all
know about Arduino. It is one of the most popular
open source micro controller board which is highly useful for doing DIY
projects.
This Arduino based 3-Way Traffic Light Controller is a simple Arduino DIY project which
is useful to understand the working of traffic lights which we see around us. We have covered a more simpler version of traffic
lights in this traffic
light circuit.
Here have demonstrated it for 3 sides or ways. Now let’s get
into the project…
Components Required:
- 3*Red LED Lights
- 3*Green LED Lights
- 3*Yellow LED Lights
- 3*220ohm Resistors
- Breadboard
- Male To Male Connectors
- Arduino Uno With Ide Cable
Circuit Explanation:
The
circuit Diagram for Arduino Traffic Light Controller project is
given below:
It’s pretty simple and can be easily built on bread
board as explained in below steps:
- Connect the LEDs in the order as Red, Green, and Yellow in
the breadboard.
- Place the negative terminal of the LEDs in common and
connect the 220ohm resistor in series.
- Connect the connector wires accordingly.
- Connect the other end of the wire to the Arduino Uno in the
consecutive pins(2,3,4…10)
- Power up the breadboard using the Arduino 5v and GND pin.
Program and Working Explanation:
The
code for this Arduino Traffic Light Controller Project is
simple and can be easily understood. Here
we have demonstrated Traffic lights for the 3 ways road and the code glows LED’s on all the three sides in a particular sequence,
in which the actual Traffic Lights works. Like, at a time, there will be two Red signals on any of the two
sides and one Green light on the remaining side. And yellow light will also glow, for 1 second each
time, in between transition from Red to Green, means first red light glows for
5 second then yellow light glows for 1 second and then finally green light will
be turned on.
In the
program, first we have declared pins (2,3…10) as output in void setup() for 9 LEDs (three on each side i.e. forward,
right and left side).
void
setup()
{
// configure
the output pins
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
pinMode(10,OUTPUT);
}
Then
in void loop() function
we have written the code for traffic lights to be turned on and off in sequence
as mentioned above.
void
loop()
{
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(8,1);
digitalWrite(2,0);
digitalWrite(6,0); //enables the 1st set
of signals
digitalWrite(3,0);
digitalWrite(7,0);
digitalWrite(10,0);
digitalWrite(9,0);
delay(5000);
.... ......
..... ......
Demo & Code
Arduino Based 3-Way Traffic Light Controller
Reviewed by XXX
on
สิงหาคม 27, 2560
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