Her philosophy is simple: “You don’t understand a logic chip until you can build its equivalent from three transistors and a few resistors.” Maria Alejandra has turned TTL models from a forgotten chapter of electrical engineering into a living, hands-on discipline. Whether you are a student struggling with logic gates, a hobbyist building a discrete CPU, or an educator seeking clear, reproducible examples, her work offers a masterclass in digital fundamentals.
For hobbyists, students, and engineering educators, her work represents a bridge between abstract Boolean algebra and the tangible world of voltage, current, and silicon. Maria Alejandra is a digital electronics educator, content creator, and open-source hardware enthusiast known for her systematic approach to demystifying 7400-series logic chips. Unlike modern tutorials that skip straight to microcontrollers, Alejandra insists on a foundation: understanding the logic gate at the transistor level. ttl models maria alejandra
Her models—often shared via GitHub, educational platforms, or detailed blog posts—are not just circuit diagrams. They are that explain how a NAND gate switches, why a flip-flop latches, and what happens inside a counter. What Are TTL Models? TTL (Transistor-Transistor Logic) refers to a class of digital logic circuits built from bipolar junction transistors (BJTs) and resistors. The classic 7400 series (e.g., 7400 NAND, 7432 OR, 7474 D flip-flop) is the backbone of discrete logic design. Her philosophy is simple: “You don’t understand a