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Visual AC Mains Voltage Indicator

Visual AC Mains Voltage Indicator

452-+N1R40LED1R281KR1R1310K671-+N2R41LED2R291KR2R1410K8914-+N3R42LED3R301KR3R1510K101113-+N4R43LED4R311KR4R1610K452-+N5R44LED5R321KR5R1710K671-+N6R45LED6R331KR6R1810K8914-+N7R46LED7R341KR7R1910K101113-+N8R47LED8R351KR8R2010K452-+N9R48LED9R361KR9R2110K671-+N10R49LED10R371KR10R2210K8914-+N11R50LED11R381KR11R2310K101113-+N12R51LED12R391KR12R2410KCOMIC4781213OUT2IN+123456789101112R258.2K+390ΩR27100KZD112V, 0.5WZENERR2639KC1100μ63VC20.1μC30.1μD1X1F1FUSE0.5AS1ON/OFFSWITCH160 TO270V AC50HZLND4D3D2R1-R12 = 100ΩR40-R51 = 1MIC1 (N1-N4)IC2 (N5-N8)IC3 (N9-N12)= LM339}PIN3 AND 12 OF LM339 ARETO BE CONNECTED TO +12VAND GROUND, RESPECTIVELYD1-D4 = 1N4007 RECTIFIER DIODEX1 = 230V AC PRIMARY TO15V AC, 300mASECONDARY TRANSFORMERVisual AC Mains Voltage Indicator
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publish time: 2020-10-23
Circuit Everyday

You shouldn't be surprised if someone tells you that the voltage of the supply may fluctuate between 160 and 270 volts.Although most of our electrical and electronic devices have some kind of built-in voltage regulator, more than 90% of their failures are due to power fluctuations.

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