Shutdown-switch - which GPIO is free? - [Hardware] Electronics https://fabscan.org/community/hardware/shutdown-switch-which-gpio-is-free/ FabScan Discussion Board en-US Sun, 12 Apr 2026 23:35:55 +0000 wpForo 60 RE: Shutdown-switch - which GPIO is free? https://fabscan.org/community/hardware/shutdown-switch-which-gpio-is-free/#post-2068 Wed, 24 Feb 2021 18:39:15 +0000 Something similar was already done by a user: 

https://github.com/helgetnt/fabscanpi-extender

Only the Serial GPIO's of the Raspberry are used. Have a look at the schematics. 

https://github.com/watterott/RPi-FabScan-HAT/blob/master/hardware/RPi-FabScan-HAT_v12.pdf

]]> [Hardware] Electronics mario https://fabscan.org/community/hardware/shutdown-switch-which-gpio-is-free/#post-2068 Shutdown-switch - which GPIO is free? https://fabscan.org/community/hardware/shutdown-switch-which-gpio-is-free/#post-2063 Wed, 24 Feb 2021 17:49:29 +0000 Hi,

some time ago I posted about my wish adding a power LED (which I already have done - connected to gnd + 3.3V adding an 1.4K resistor) and an shutdown-switch.
Latter one I haven't done, because I didn't know which GPIO is free for this.

I already mounted the switch, connected to 3.3V using an 10K resistor. So I only need to solder it to the approprirate pin. Which one is free?

btw: sorry if my question still exists here anywhere... I couldn't find it. Usability of this forum isn't quite as good as an good old phpBB or someshing like that. How can I find my own posts? :D

]]> [Hardware] Electronics Micha_AC https://fabscan.org/community/hardware/shutdown-switch-which-gpio-is-free/#post-2063