Where can I find a cheap keypad?

Question

Keyboard

It so happened that on my keyboard there is not enough space for all sorts of hot keys, or they just sometimes become uncomfortable, whether it's switches like an audio output switch or all sorts of software like the same nVidia control panel. It constantly happens, for example, that I don’t know where to put the hotkey in order to always remember where it is or I assign it to a seemingly unused combination, which is then accidentally pressed because each of the keys accidentally becomes necessary at the same time or turns out to be nearby and as a result of a miss click, something that I didn’t want is called call. After this, the question arose of finding an additional keyboard to which you can assign all these hotkeys so that it lies on the sidelines and the main one does not react to all magic combinations, really simple googling shows me solid blocks of number keys or hellishly glowing gaming keyboards with a few additional buttons, which, moreover, will constantly be accidentally pressed with the edge of the hand due to their crappy placement. If anyone knows such keyboards, please give a tip.
Earlier , a similar question popped up here , but from what they advised, a mouse and keyboard with programmable keys, which personally will only interfere with me, and keypads that I managed to find either in the form of the same gaming devices with a glow in all colors from all places or a little more seasoned but for 6k + from Amazon, but I want something cheaper and no frills in the form of lighting, supplies for the hand, bent design solutions, etc.

Answer 1

Cheap - only a software solution, connect any second cheapest keyboard and write software that will recognize pressing only from it (this is possible, but I did not find ready-made solutions).
I used only one software that can work in windows with different keyboards separately - aster from ibik, which allows you to make several workers from one physical machine (by connecting several keyboards, mice and monitors, even to one video card), it is clear that this is not your solution (plus not free - 700 rubles per year for 2 jobs or 2 thousand rubles for always), but if you do not know how to write applications at the driver level, then it will allow you, for example, to write an application that accepts keys on one user of such a multiterminal and send the corresponding signals to the second (your worker).
You buy the cheapest smartphone with OTG support (almost everyone can), it's about 2t.r. I remember there was a good smartphone from tele2 for 1600, though the hardware is slow but functional. Then, connect your keyboard to it, write a simple application (even a web!) for a smartphone that listens to keys and a simple application for playing shortcuts in the form of a web server (websocket) or also a client and a separate web server (even easier). And you get a result worth about 2t.r.-3t.r.