Where can I find training boards?

Question

Arduino

here is a video on the classic
https://www.youtube.com/watch?v=wvTIfKLy1Z0
our production, but it is not delivered individually, so I'm looking for a prototype on eBay, if anyone has encountered such a task, unsubscribe. keywords, links, below the description of the requirements of the
processor, buttons (preferably not the usual black ones), read-write rights LEDs, dials and screens, memory, that is, a computer in its simple form, flashing, operations, entering commands, any ideas?

Answer 1

Arduino or Raspberry with modules.

Answer 2

Once upon a time, even under Soviet rule, I had a chance to learn on a similar device only on a 580 processor. Well, hemorrhoids, I tell you, and nothing so particularly informative.
Now, in my opinion, it is much easier and more useful to take a development environment with a debugger corresponding to the processor and admire the commands, registers, etc. already there.

Answer 3

pinboard? easyelectronics.ru/otladochnaya-plata-pinboard-ii.html
Or do you need a specific processor?