I have been a member of this board since 2012, when I first wanted to build a terrarium. I never did, because I simply couldnt find the time. Finally, this year I decided to just have one made instead. I contracted Dutch-Rana, a dutch builder, to build me a 48x24x42 (120x60x110) rectangular terrarium focussed on orchids. It will eventually house Panamanian dart frogs, since my wife grew up in Panama and would love some of those frogs in there.
I wanted to build a high-tech terrarium, so I opted to do most of the technical system myself with a lot of help from my brother, an electrician. Together we designed an industrial style electrical/computer setup that can run the terrarium in two different modes, either controlled by a Raspberry PI, or by a set of timers. Each device can individually switch mode.
A benefit of this setup is that it's very clean and compact. If I need to do any work on the Raspberry PI, I can easily switch everything to the timers and things will just continue running. The software I use to run the system and drive the tablet interface is Node-Red.
The terrarium has 4 T5 bulbs, 2 Solar Raptor HID lamps, a moon light led strip, 5 mist heads, several fans, an aquarium heater, a small aquarium pump for a little water stream, and an automated led strip inside the cabinet. All of these can be controlled using a tablet.
The cabinet was custom made out of oak by a separate company according to my specs.
Some pics of the system.