Interrupt at shutdown(Solved)

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hello. i've searched bit , found topics on this, objetive write eeprom @ shutdown, writing memory takes power needed battery backup, etc. case simple think. need send 3 bytes via serial @ 31250 baud rate when shutdowns. use interrupt in fall mode, ok? how make connection? voltage divider @ interrupt pin maybe? voltage takes few seconds reach 0v, before 7805  is +12/-12 power supply 4700uf filter capacitors. thanks

your ideas sounds you're on right track, think time prototype right capacitor


Arduino Forum > Using Arduino > General Electronics > Interrupt at shutdown(Solved)


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