14 1
1. Until SW1 is CLOSED the Circuit uses no current.
About 90 seconds after SW1 is closecl the Buzzer will sound. The exact delay depends on the actual components used.
You can adjust the delay by altering the values of R1 and/or Cl. Any of the three Cmos ICs may be used.
2. Until SW1 is CLOSED the Circuit uses no current.
About 90 seconds after SW1 is closed the Buzzer will begin a series of short Beeps, 3 to 5 seconds apart. This saves battery power. R5 & C2 set the length of the beeps; R4 & C2 the delay between them. A Cmos 4001 IC is NOT suitable for this Circuit.
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