Comment by JdeBP
You should have been watching lots of SciFi, too. (-:
I have a Raspberry Pi in a translucent "modular case" from the PiHut.
* https://thepihut.com/products/modular-raspberry-pi-4-case-cl...
It is very close to the same size and appearance as the "key" for Orac in Blake's 7.
I have so far resisted the temptation to slap it on top of a Really Useful Box and play the buzzing noise.
* https://youtube.com/watch?v=XOd1WkUcRzY
Obviously not even Avon figured out that the main box of Orac was a distraction, a fancy base station to hold the power supply, WiFi antenna, GPS receiver, and some Christmas tree lights, and all of the computational power was really in the activation key.
The amusing thing is that that is not the only 1970s SciFi telly prop that could become almost real today. It shouldn't be hard -- all of the components exist -- to make an actual Space 1999 commlock; not just a good impression of one, but a functioning one that could do teleconferencing over a LAN, IR control for doors and tellies and stuff, and remote computer access.
Not quite in time for 1999, alas. (-: