Marcio Cunha

Technical Articles

Practical articles, in-depth tutorials, and architectural insights on software engineering, AI, and systems.

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EletrônicaEngenharia•12 min

How to Test Diodes, Transistors, and MOSFETs with a Multimeter: A Practical Guide

Learn how to diagnose essential electronic components using just a common multimeter. This practical guide details step-by-step procedures to safely and accurately test diodes, bipolar transistors, and MOSFETs.

EletrônicaEngenharia•12 min

How to Identify Faulty Electronic Components on a Board Using a Multimeter

Learn the practical step-by-step process to test diodes, resistors, capacitors, and transistors directly on an electronic board using only a digital multimeter, without expensive equipment.

EletrônicaEngenharia•11 min

How to Test Integrated Circuits (ICs) Using a Multimeter

Learn how to diagnose faults in integrated circuits using just a standard multimeter. Master practical continuity, voltage, and resistance tests to identify damaged components on electronic circuit boards.

AutomaçãoEngenharia•12 min

How to Choose a PLC for HVAC, Chillers, and Building Automation Systems

A practical guide for engineers and designers on selecting programmable logic controllers for complex building systems, covering protocols, redundancy, and real-time control.

AutomaçãoEngenharia•12 min

How to Integrate PLCs into a BMS Using BACnet, Modbus TCP, and OPC UA

Learn how to connect industrial controllers to building management systems efficiently using standard protocols like BACnet, Modbus TCP, and OPC UA.

AutomaçãoEngenharia•12 min

Building Automation and Energy Efficiency: How to Reduce Facility Consumption

Discover how integrated building automation and modern algorithms transform commercial and residential facilities into high energy-efficiency ecosystems, cutting costs without sacrificing comfort.

AutomaçãoEngenharia•12 min

BMS in Practice: How an Intelligent Building Management System Works

Discover how building management systems automate modern facilities, integrating HVAC, energy, security, and IoT to optimize costs and operational efficiency.

AutomaçãoEngenharia•12 min

Modbus TCP vs Modbus RTU: Differences, Advantages, and When to Use

Explore the core differences between Modbus TCP and Modbus RTU, evaluate their performance and infrastructure trade-offs, and discover the best protocol for your industrial automation projects.

EngenhariaDevOps•12 min

Why I Chose Open Source: Freedom, Collaboration, and Long-Term Sustainability

Discover the strategic, technical, and philosophical reasons that led me to adopt and advocate for open-source software in modern engineering. We analyze the trade-offs of governance, security, and corporate autonomy.

DevOpsEngenharia•12 min

How to Secure a Linux Server: Essential Security Practices

Discover the definitive step-by-step guide to hardening Linux server security in the cloud or on-premise. Learn how to close unnecessary ports, configure SSH key authentication, and shield your system against intrusions.