need help for a 555 timer project

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marisan

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good day.
i have the idea of "power failure and power resumption indicator/alarm" (using 555 timer) as my project. i have seen a power resumption circuitry. i'd like to use this concept but since this project only applies to the resumption of the power supply, can you please help me about modifying it.
thank you very much.
 

can you post the power resumption circuit?
 

sir, this is from electroschematics.com.

 

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