"delayed" accessory power?

[bigegg]

I have a 2002 is300 sportcross.

I want to install a raspberry Pi head unit, but need to give it a way to safely shutdown on power off.

Ideally, this means I need to tap into a power circuit which stays on for a few minutes after the ignition is switched off.

 

Is there such a circuit on my car?

 

Its not a big deal if not, as I can add a l delay circuit in other ways.

 

[ColinBarber]

5 hours ago, bigegg said:

Is there such a circuit on my car?

No, unfortunately not.

You would need a delay circuit connected to a permanent feed. Something like this (without wiring up the door switch connection).

https://www.ebay.co.uk/itm/271538416211

 

[bigegg]

4 hours ago, ColinBarber said:

No, unfortunately not.

You would need a delay circuit connected to a permanent feed. Something like this (without wiring up the door switch connection).

https://www.ebay.co.uk/itm/271538416211

 

I'm thinking of adding a small microcontroller (maybe an esp32) as the timing controller, I can also make the wing mirrors auto-retract with it.

 

There'll be a write-up eventually...