_HowTo: RPi Start-stop button with shutdown and power-off features

I recently finished a design, based on an idea from sparkyPi, a raspberry Pi forum member, where he was using a rather special purpose chip to add start-stop functionality. He needed a special Device Tree feature to create a signal that the Pi sends out when the shutdown sequence has finished, and even got help from the designers to complete that. His attempts led me to find yet another method to do the same, but without some side effects that the other method introduces.

In the meantime, I ordered some of the chips (LTC2951-1 : Start-Stop Push Button Controller) he used, and I was able to built a working circuit that does not even need Device Tree features. Here is the link to the post: https://www.raspberrypi.org/forums/viewtopic.php?f=41&t=117863

In this post you'll also find the links to the other ones.

Enjoy!

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