Raspberry Pi Rackmount Tray with Shutdown Button

This is a remix of the Raspberry Pi rack-mount tray that allows inserting a micro-switch and wiring that switch to pins on the Raspberry Pi to create a shutdown button.

I modified this because I always found myself forgetting to shutdown the server remotely and needing to go back and run the shutdown, then come back before unplugging the server from the rack to make a change.

The micro-swtches I used are here: https://www.amazon.com/dp/B07CMZCQS5?ref=ppx_yo2ov_dt_b_product_details

I use pins 39 and 40 which equates to GPIO 21. All that was needed is to add the below line to the config.txt:

dtoverlay=gpio-shutdown,gpio_pin=21

I hope this helps others as it is already saving me multiple trips back and forth to my server rack.

These are the build steps:

1. Print the tray.
2. Clip the leads off the micro-switch leaving enough to solder to on one side
3. Solder the wire jumper to the switch, leaving about 3 inches or 75mm of wire between the solder points and the con