This is sound generator circuit.You can use this circuit for your alarm circuits.Here I have used common IC 4011.This circuit gives about 10W through a 8 ohm speaker.This circuit can be control (on and off) with sw1.
Note
# Use 12V smooth power supply for this
# Build this on a PCB
#If you are unable to find IC 4011 you can use Ic MC14011 or TC14011
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