Laser transmitter/receiver circuit diagram

Photocoupler

Below is the circuit diagram of [Laser Transmitter/Receiver Circuit ]

Transmitter circuit

Receiver circuit

Component BOM:

C1, C2 0.1uf Ceramic Disc Capacitor
C3 100uf 25V Electrolytic Capacitor
R1 100K Ohm 1/4W Resistor
R2 1M Ohm 1/4W Resistor
R3 10K Pot
Q1 NPN Phototransistor
U1 741 Op Amp
U2 LM386 Audio Amp
SPKR1 8 Ohm Speaker
T1 8 Ohm: 2K Audio Transformer
MISC Wire, Board, Knob For R3, LASER Tube and Power Supply