Simple CPU architecture, detailed internal structure, digital circuitry, wires, microprocessor, ALU, registers, control unit, bus interface, von Neumann architecture, 8-bit or 16-bit, single-cycle execution, pipelining, Harvard architecture, fetch-decode-execute cycle, clock signal, reset button, PCB board, breadboard prototype, lab setting, close-up shot, high-contrast lighting, shallow depth of field, futuristic ambient light, technical drawing style.