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| 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 |