Fundamentos De Sistemas Digitales Thomas L. Floyd May 2026

Then came the AND gate. Floyd didn't just show a diagram; he described a security system: two switches in series. Both must be closed for the alarm to sound. Elena grabbed two paperclips and a dead battery. She built it. It worked.

She stayed up all night, not memorizing, but building . She designed a combination lock using AND gates. She built a memory cell using a feedback loop (Floyd called it a latch). She even began to understand the humble adder—a circuit that could add two numbers together using nothing but simple logic. fundamentos de sistemas digitales thomas l. floyd

At dawn, she walked into the taller . Her grandfather was already there, fitting a new balance wheel into a 19th-century pocket watch. Then came the AND gate

He reached under the counter and pulled out a small, circuit board he’d built decades ago. It was a digital clock—made entirely of discrete TTL chips. On the back, etched in faded marker, it read: “Gracias, Floyd.” Elena grabbed two paperclips and a dead battery

“Abuelo,” she said, holding up the Floyd book. “This isn't the enemy of analog. It’s the same thing. A watch is a sequential circuit. Gears are flip-flops. The mainspring is the power supply. The escapement is the clock signal.”

Click.

Don Augusto looked up, his magnifying loupe winking in the morning light. He smiled a wide, proud smile. “I know, mija . I was that student.”