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Small non-contact refrigerator time delay protector circuit

2016-09-20 11:48  
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Small non-contact refrigerator time delay protector circuit diagram
The protector circuit is shown in the figure 1. 220V AC power passes the capacitor C1 buck, VD1 half-wave rectifier to the regulated VDW the time base circuit 555 as a working power supply. When it connects to power supply for about 5 minutes, the time base circuit ③ foot outputs from low to a high level. The two-way thyristor VS will be conducted to work and provides power supply for the refrigerator. At this time the light-emitting diode LED is lit. It indicates the power supply is normal.