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I read a lot about this but I can't find a satisfying solution.

I want the Pi to automatically power on when I start the engine and to cleanly power off when I turn it off.

what I thought was to power the Pi from the vehicle battery using a 12v to 5v charger and to connect it to the cigarette lighter socket through a 12V DC DPDT relay, which shorts a pin configured for dtoverlay=gpio-shutdown when I turn the ignition off and shorts the RUN pin to resuscitate the Pi when I turn the it on. see image below: enter image description here the problem is that the Pi doesn't boot when I short the RUN pin but only when I reopen the circuit between the 2 pins.

solutions?

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    google picopsu ... m.youtube.com/watch?v=z2aQNlo9dbU
    – jsotola
    Jan 18, 2020 at 23:59
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    I've been using this without a single problem for over a year: mausberry-circuits.myshopify.com/collections/…
    – SoreHands
    Jan 19, 2020 at 0:49
  • I'm looking for something cheaper, I shouldn't be far away from the answer
    – Miky
    Jan 19, 2020 at 2:08
  • maybe a NC relay between RUN and GND pins so that when the circuit is closed it opens immediately after could work?
    – Miky
    Jan 27, 2020 at 0:05
  • @SoreHands does it cut the power to GPIO/USB too when the Pi is powered off?
    – Miky
    Jan 30, 2020 at 0:26

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