Parking and incoming call alarm circuit (3)
Source: InternetPublisher:fish001 Keywords: Alarm circuit rectifier filter NAND gate Updated: 2021/09/24
Circuit working principle: 220 V AC voltage through R. Step-down current limiting, VD1 rectification ,
C1 filtering , R2 voltage division, a DC voltage of about 10 V is obtained across R2. C036 is
a micro-power two-input four -NAND gate CMOS integrated circuit.
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