Automatic shutdown system for ECUs

[guru.jr]

Hello all!
I am developing a system for automotive application. I have requirement, I need to shutdown the system after a particular time after the ignition goes off. Give me some ideas if you can.
Thanks in advance. :grin:

 

[kam1787]

how long a time is the 'particular time' does it have to be precisely timed?

there are 3 parts; power off signal, timer, and power switch

google 'power off' switch for the power off signal