--------------------------------------------------------------------------------------------------------------IC 555 (1)
IC Base (1)
LDR (1)
Relay 6V or 12V/ 150E (1)
Transistor TR1 BEL 187 (1)
Diode D1 IN4001 (1)
* Resistance
R1 100K (1)
R2 330E (1)
R3 2K2 Preset (1)
POT, Wire as Required.
BELL or BUZZER
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