This idea is good for automatic turning on and off multiple lights one by one while a person is walking staircase or walking through a passage or hallway. As IR Obstacle Sensors has physical limits, we can not use if the passage is wide like a road – it will fail for physical reasons. Human is not much thick too! In our previous guides – Arduino IR Obstacle Detection Sensor For Dimming LED and Arduino LED Switch On By Push Button Switch Off By IR Obstacle Sensor, we turned LED off facing obstacle.
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Arduino : Light ON One By One Following Foot Steps on Staircase
We can reverse the action i.e. TURN ON LED facing obstacle by minimum modification :
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int LED = 13; int obstaclePin = 7; int hasObstacle = HIGH; void setup() { pinMode(LED, OUTPUT); pinMode(obstaclePin, INPUT); } void loop() { hasObstacle = digitalRead(obstaclePin); if (hasObstacle == HIGH) { digitalWrite(LED, HIGH); } else { digitalWrite(LED, LOW); } delay(200); } |
With Arduino, We Can Turn Light ON One By One Following Foot Steps on Staircase or Hallway. So As the Person Leave a Position, Light Turns Off. That is possible if we use multiple IR Obstacle Detection Sensors and multiple LEDs as model and in real, instead of LED, AC light with relay module.
With four IR Obstacle Sensors and 6 LEDs, circuit diagram is practically same like older guide. Only each LED and IR will use different pins.
With four IR Obstacle Sensors and 6 LEDs, our code will go like this :
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int ir1=2; int ir2=3; int ir3=4; int ir4=5; int led1=6; int led2=7; int led3=8; int led4=9; int led5=10; int led6=11; int proxy1=0; int proxy2=0; int proxy3=0; int proxy4=0; void setup() { pinMode(ir1,INPUT); pinMode(ir2,INPUT); pinMode(ir3,INPUT); pinMode(ir4,INPUT); pinMode(led1,OUTPUT); pinMode(led2,OUTPUT); pinMode(led3,OUTPUT); pinMode(led4,OUTPUT); pinMode(led5,OUTPUT); pinMode(led6,OUTPUT); } void loop(){ proxy1=digitalRead(ir1); proxy2=digitalRead(ir2); proxy3=digitalRead(ir3); proxy4=digitalRead(ir4); if(proxy1==HIGH) { digitalWrite(led1,LOW); digitalWrite(led2,LOW); digitalWrite(led3,LOW); } else { digitalWrite(led1,HIGH); digitalWrite(led2,HIGH); digitalWrite(led3,HIGH); } if(proxy2==HIGH) { digitalWrite(led2,LOW); digitalWrite(led3,LOW); digitalWrite(led4,LOW); } else { digitalWrite(led2,HIGH); digitalWrite(led3,HIGH); digitalWrite(led4,HIGH); } if(proxy3==HIGH) { digitalWrite(led3,LOW); digitalWrite(led4,LOW); digitalWrite(led5,LOW); } else { digitalWrite(led3,HIGH); digitalWrite(led4,HIGH); digitalWrite(led5,HIGH); } if(proxy4==HIGH) { digitalWrite(led4,LOW); digitalWrite(led5,LOW); digitalWrite(led6,LOW); } else { digitalWrite(led4,HIGH); digitalWrite(led5,HIGH); digitalWrite(led6,HIGH); } } |
About Abhishek Ghosh
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