激光发射器/接收器电路 LASER Transmitter/Receiver
This set of two circuits from the basis for a very simple light wave transmitter. A LASER beam is modulated and then aimed at a receiver that demodulates the signal and then presents the information (voice, data, etc..). The whole thing is very easy to build and requires no specialized parts execpt for the LASER itself. LASERs are available from MWK Industries.

Schematic Of Receiver

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