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Op Amp Siren system circuit

2017-08-16 18:51  
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The siren circuit is what importance in various alarm. For example : the emergency alert, burglar alarm circuits, Fire alarm circuits, Timer , sensor controls, etc. If we have not these circuit, We will not able to recognize the functionality of the circuit,we set out.The circuit uses a  CA3130 BiMOS op amp as a multivibrator to control the siren's rate. A CA3094 used as a VCOis followed by a CA3082 transistor array used to drive a speaker. A `Manual` or `Auto` mode switch allows the user to select either intermittent or continuous siren operation, respectively.In addition, three switches are available that control `Mode`, `Attack`, and `Rate`.The ramp voltage from the low frequency oscillator 1C1 modulates IC2 thereby producing a rising and falling tone like the siren.

Siren system circuit  



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