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The new style flashing alarm integrated application circuit

2017-02-05 04:51  
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The new style flashing alarm integrated application circuit
The new style flashing alarm integrated application circuit R1 is an external resistor of the internal oscillator, by changing the resistance of R1, the frequency of the internal oscillator in IC can be changed, when R1=330kΩ, the output flashing frequency of IC is 4Hz, and the IC will stop working in 16s after it is triggered. To strengthen the sound effect, a power triode can be connected with the output terminal, which can drive the loudspeaker play back. Besides, CW168 can be triggered by all kinds of control circuits, so the auto control can be fulfilled.