ඕන දේවල් :-
- resistors: 10k, 47k, 1M ×3
- presets: 100k, 1M
- capacitors: 0.01µF, 0.1µF, 10µF 25V radial
- transistor: BC108 (or equivalent)
- 7555 low-power timer IC
- 8-pin DIL socket for IC
- LDR (light-dependant resistor) type ORP12
- bleeper 9-12V
- on/off switch
- battery clip for 9V PP3
- stripboard 12 rows × 25 holes
පරිපථය :-
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