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Power Failure and Resumption Alarm

Power Failure and Resumption Alarm

+COMIC1780913OUT2ININPUT230V AC50HZ++1441361210IC1LM5565123117VCC89GNDO/P2O/P1R2R1+X1D1-D4 = 1N4007X1 = 230V AC, PRIMARY TO 0-12V, 250mA SECONDARY TRANSFORMERC11000μ35VD3C20.1μVR12.2KD51N4007D61N40079VBATT.R31KT1BC558R210KR1100ΩR41MD71N4148R5270KR622KR11120ΩR7270ΩR81KLED2R91KR1010KT3BC548VR24.7KC610μ25VC50.01μC40.01μC347μ25VPZ1-PIEZOBUZZERT4BC557C74700μ25VD81N4007D2D1D4LED1BI-COLOURLEDPOWERRESUMEPower Failure and Resumption Alarm
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publish time: 2020-10-23
Circuit Everyday

The circuit indicates power failure and recovery in an audio-visual manner.The circuit is built around the dual timer IC LM556.The two-color LED emits a green light when a power supply is present, and turns red when the power supply fails.

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