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The automatic refrigerator protection composed of 555

2015-01-31 06:11  
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The automatic refrigerator protection composed of 555
The chart shows the automatic refrigerator protection circuit. The protection is composed of the step-down circuit, undervoltage and overvoltage control circuit, delay circuit, leakage detection circuit and sound and light alarm circuit. Buck rectifier circuit provides DC voltage for the entire circuit. The protection has the functions of overvoltage and undervoltage protection, power delay, automatic power-off leakage, sound and light alarm and so on, thereby avoiding accidental damage caused to refrigerator.