I have made a 500 watt ups and it is working manually.i want to make the ups circuit fully automatic so that if wall outlet power goes off then it sarts to work and gives power and when wall outlet power comes back then it stops its working and begins to charge the battery.i am sending a schematic diagram so plz tell me how can i make it fully automatic with the use of relay or an other devicexplz send me the circuit diagram required.
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