14 2
3. While Swl remains CLOSED the Circuit uses virtually no current. About 90 seconds after SW1 is OPENED, the Buzzer will begin a series of short Beeps, 3 to 5 seconds apart. This saves bartery power. R5 & C2 set the length of the beeps; R4 & C2 the delay between them. A Cmos 4001 CANNOT be used for this Circuit.
4. While Swl remains OPEN the Circuit uses virtually 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 CANNOT be used for this Circuit.
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