Comment Comment by spektom My neighbor had a custom made keyboard for his ZX spectrum, based on reed switches:https://en.m.wikipedia.org/wiki/Reed_switchMine was manufactured at a tractor plant, and one had to press really hard on switch a to get a response. parent spektom 3 years ago
https://en.m.wikipedia.org/wiki/Reed_switch
Mine was manufactured at a tractor plant, and one had to press really hard on switch a to get a response.