Infrared sensor | How to make Long Distance IR proximity sensor at home

Long Distance IR Obstacle sensor at home .

Project introduction:-

This IR proximity sensor can detect long distance obstacles with a maximum range up to 4 feet(120cm). 

Circuit diagram 

IR Proximity Sensor circuit diagram 

Part's list:-

Most important part of the ir Proximity Sensor 

How To Make Long Range Infrared Proximity Sensor.

All Resistors is 0.25watts :-

R1-1.8K.
R2,R3-4.7K.
R4-150K.
R5,R13,-1M.
R6,R8,R11,-10K.
R7-100K.
R12,R14-220K.
R15-15K.
R9, R10, R16, R17-1K.

Capacitors :-

C1-472J.
C2,C3-104.
C4-10uf/63v.
C5-4.7uf/63v.

Diodes:-

D1,D2-1N4148.

You can used 1n4007 Diodes in this circuit.

 Transistors:-

Q1,Q3,Q4-BC547. 
Q2-BC557 

LED :-

L1(yellow)-delay indicator
L2(red)-out put indicator
L3(green)-signal indicator

You can used any colours of LED 

Potentiometer:-

Pot1,Pot2-100K

POT1- Range adjustment.

POT2- Delay adjustment .

Tsop1838

IR 5mm LED