IR obstacle Sensor for Arduino Projects

IR obstacle Sensor for Arduino Projects

We can buy IR sensor from market or through online shopping sites but it costs us around Rs. 150/- here in this tutorial I am going to Show You how to make an Infra Red Obstacle Sensor under Rs. 25/- . The sensor which we are going to make is suitable for Arduino Projects and various other applications.

Youtube Video Link.
https://www.youtube.com/watch?v=lqxUHl-0eIk

Step by step tutorial to make IR Sensor

List of Items.
1) IC 555 Timer
2) IR diodes   x2
3) Capecitor 100mf / 16 v    x1
4)  Resistor -2    1k,  10k,
5) LED (any colour)
6) Wires for connection


Lets Begin the Project, Mount the IC 555 Time in the center of the Breadboard and follow the steps to make connection between components.

1) connect Pin no 8 to positive Terminal of Battery (4.7 Volt Mobile Battery)
2) Connect Pin no. 1 to the Negative Terminal of the battery.
3) Short Pin no. 6 and Pin no.7  with each other
4) connect 1K Resistor between IC's Pin no. 7 and Pin no. 8.
5) Place a  100 mf capacitor between IC's Pin no. 6 and Pin no. 1.
6) Place IR LED between IC's Pin no.1 and 2 such that the cathode of IR LED is at the Pin no.2
7) Place another IR LED Between IC,s Pin no. 1 and 8 with a 1k Resistor at anode of IR LED.
8) Pin no. 3 is Output which will be in the form of Positive Pulse connect a LED (Any Colour).
9) Output LED will have its Anode at Pin no. 3 and cathode at IC,s Pin no. 1.

 Now when an obstacle comes in front of both IR LED,s, the IR rays from Tx IR LED get reflected by the obstacle and reach the Rx IR LED the the IC 555 Time which is used in Monostable Mode get trigger (Low) at Pin no.2  thus it Provide High  at Output Pin no. 3 . and the output LED glow up.

Circuit is complete enjoy the sensor with arduino Projects.

Same circuit can be modified to Automatic Door Bel Circuit .  
Same circuit can be used in reverse parking of Automobiles to detect the obstacle distance.

Autometic Door Bell using IC 555 Timer
https://www.youtube.com/watch?v=1AnnUgl1y_c

 IR obstacle Sensor for Arduino Projects
http://electronics4ubymanmohanpal.blogspot.in/2018/04/ir-obstical-sensor-for-arduino-projects.html