I found a timer which is usually mounted onto a DIN rail (to be exact, it is a “deleyCON Digitale Zeitschaltuhr zum Einbau in Schalttafeln mit LCD Display”, see e.g. [https://www.amazon.de/gp/product/B078TJV1WD](https://www.amazon.de/gp/product/B078TJV1WD) for more details). In order to make use it stand-alone within a usual Euro-wire, I decided to print a box to be safe-guard everybody from electrical shocks.

PS: Please bear with me, this is the first prototype and still in the printing queue.