I thought it is an overkill, though probably a convenient and practical one. But if one's aim is hacking with simpler technologies, a mechanical linkage (maybe

I thought it is an overkill, though probably a convenient and practical one. But if one's aim is hacking with simpler technologies, a mechanical linkage (maybe something with a cam) should suffice for this task. Or an electrical circuit with simpler components, without digital logic in it.