The choice of relay was important ... design of this multiplexer is just as slick as the electrical. [Petteri] designed the PCB to act as the cover for a standard Hammond project box, so all ...
The electromechanical relay, used as a constructive part of some early calculators and computers (see computers of Zuse, Aiken, and Stibitz), was invented in 1835 by the brilliant US scientist ...