Google image search (what GP tried) for “zx81 micromouse” but clicked on “The rest of the results might not be what you're looking for. See more anyway” at the bottom, which surfaced a link to https://forum.arduino.cc/t/its-1982-and-you-need-a-microcont....

I tend to take it as a challenge when someone claims they can’t find something on the net. ;)