The eyes of a blind man.
This is my 19th project based on Arduino. The name of the project is 'The eyes of a blind man. This project is designed for people who can't see with their eyes. Using the 'The eyes of a blind man' Project they understand if there is any obstacle within the specified distance. Moreover, blind people can now understand day or night using the 'The eyes of a blind man' Project. 'The eyes of a blind man' project can be the ideal choice for any college university or science fair project.
List of sensors that will be needed to project:-
- Arduino Mega/Uno/Nano
- Ultrasonic Distance Range Sensor Module(HC-SR04)
- Buzzer
- Push Button
- LDR
- 10k Resistor
- Wire
- Hardboard
Circuit Diagram:-
Project Code:-
int trigPinA =8;//l
int echoPinA =A1;
int trigPinB =A2;//m
int echoPinB =A3;
int trigPinC =A4;
int echoPinC =A5;
long durationA;//L
int distanceA;
long durationB;//M
int distanceB;
long durationC;//R
int distanceC;
int buzzer = 13;
int LDR = A0;
int LDRState=0;
void setup()
{
pinMode(trigPinA,OUTPUT);//L
pinMode(echoPinA,INPUT);
pinMode(trigPinB,OUTPUT);//M
pinMode(echoPinB,INPUT);
pinMode(trigPinC,OUTPUT);//R
pinMode(echoPinC,INPUT);
pinMode(LDR,INPUT);
Serial.begin(9600);
}
void loop() {
//L
digitalWrite(trigPinA,LOW);
delayMicroseconds(2);
digitalWrite(trigPinA,HIGH);
delayMicroseconds(10);
digitalWrite(trigPinA,LOW);
durationA=pulseIn(echoPinA,HIGH);
distanceA = durationA*0.034/2;
//(distanceA >= 50)?digitalWrite(buzzer,HIGH):digitalWrite(buzzer,LOW);
//L
//M
digitalWrite(trigPinB,LOW);
delayMicroseconds(2);
digitalWrite(trigPinB,HIGH);
delayMicroseconds(10);
digitalWrite(trigPinB,LOW);
durationB=pulseIn(echoPinB,HIGH);
distanceB = durationB*0.034/2;
//(distanceB >= 50)?digitalWrite(buzzer,HIGH):digitalWrite(buzzer,LOW);
//M
//R
digitalWrite(trigPinC,LOW);
delayMicroseconds(2);
digitalWrite(trigPinC,HIGH);
delayMicroseconds(10);
digitalWrite(trigPinC,LOW);
durationC=pulseIn(echoPinC,HIGH);
distanceC = durationC*0.034/2;
//R
(distanceA >= 50 || distanceB >= 50 || distanceC >= 50)?digitalWrite(buzzer,HIGH):digitalWrite(buzzer,LOW);
//LDR
LDRState=analogRead(LDR);
if(LDRState >= 50){
digitalWrite(buzzer,HIGH);
delay(20);
digitalWrite(buzzer,LOW);
delay(20);
}
else{
digitalWrite(buzzer,LOW);
//LDR
Serial.println(distanceA);
}
}
Download The Project File
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