...Let me use the Z-80A (I remember it was Jameco's about $50) to build the computer,... some parts require 25V for programming, while others require 12V. ...I see people use discrete transistors and even relays to make CPUs, I don't...
There are fairly cheap 24V switches and high-efficiency DC-DC converters that can reduce the voltage from 24V to 12V. The relay was mentioned, but you are looking at (...
Módulo de relé,interruptor de relé práctico de 12V LED 50Ma, Dc30V10A ... 10 Juegos DC 12V Power Relay, PropóSito General 2 NO 2 NC 8 Pin ... Relé de estado sólido Industrial DC Control AC SSR 80A / 120A ..