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Alarm circuit with flashing indicator light
Source: InternetPublisher:张小哥 Keywords: Alarm circuit indicator light LED display diode Updated: 2021/01/26
Circuit working principle: The integrated circuit in the network adopts HFC9561A four-sound alarm flash
circuit. This circuit can not only emit police car sounds, fire truck sounds, ambulance sounds and machine gun
sounds, but also has two LED display output terminals, which can directly drive the IED to emit light.
diode . When there is an alarm sound output, LED1 and LED2 will
flash in turn with a period of about 0.36 s.
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