Anet Pi-Zero*W and Relais

This thing was made with Tinkercad.
I control the printer with OctoPrint. http://octoprint.org/
The GPIO is controlled via Enclosure Plugin (3.51).
The Raspberry Pi Zero W case is designed by geertvda.
https://www.thingiverse.com/thing:2171313
With the relay I switch the printer and an LED light.
The connections on the GPIO must be soldered directly. The distance is too small.
A heat sink is an advantage.