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Car Speed Detector
Just Do Electronics
April 20, 2020
Car Speed Detector using Arduino and IR Sensor
Circuit Diagram :-
Code :-
//Prateek //www.prateeks.in #include
LiquidCrystal lcd(12,11,10,9,8,7); int timer1; int timer2; float Time; int flag1 = 0; int flag2 = 0; float distance = 5.0; float speed; int ir_s1 = 2; int ir_s2 = 3; int buzzer = 4; void setup(){ pinMode(ir_s1, INPUT); pinMode(ir_s2, INPUT); pinMode(buzzer, OUTPUT); lcd.begin(16,2); lcd.clear(); lcd.setCursor(0,0); lcd.print(" WELCOME "); lcd.setCursor(0,1); lcd.print("JustDoElectronic"); delay(2000); lcd.clear(); } void loop() { if(digitalRead (ir_s1) == LOW && flag1==0){timer1 = millis(); flag1=1;} if(digitalRead (ir_s2) == LOW && flag2==0){timer2 = millis(); flag2=1;} if (flag1==1 && flag2==1){ if(timer1 > timer2){Time = timer1 - timer2;} else if(timer2 > timer1){Time = timer2 - timer1;} Time=Time/1000;//convert millisecond to second speed=(distance/Time);//v=d/t speed=speed*3600;//multiply by seconds per hr speed=speed/1000;//division by meters per Km } if(speed==0){ lcd.setCursor(0, 1); if(flag1==0 && flag2==0){lcd.print("No car detected");} else{lcd.print("Searching... ");} } else{ lcd.clear(); lcd.setCursor(0, 0); lcd.print("Speed:"); lcd.print(speed,1); lcd.print("Km/Hr "); lcd.setCursor(0, 1); if(speed > 50){lcd.print(" Over Speeding "); digitalWrite(buzzer, HIGH);} else{lcd.print(" Normal Speed "); } delay(3000); digitalWrite(buzzer, LOW); speed = 0; flag1 = 0; flag2 = 0; } }
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