Technical Articles

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

All categories Arquitetura Automação Backend Carreira DevOps Eletrônica Engenharia Frontend Hardware IA Negócios Produtividade Redes

How to build reliable RAG with semantic chunking

Learn practical engineering steps to prevent AI hallucinations by splitting texts by context and removing vector noise.

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Produtividade•3 min

How to remove image background in Excel without Paint

Learn how to isolate objects and graphics directly inside Excel spreadsheets quickly and automatically, without opening external editors.

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Backend•4 min

Slow database? How to find heavy queries in PostgreSQL

Learn hands-on how to inspect PostgreSQL logs and enable tracking for heavy queries without impacting your production environment.

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Redes•4 min

How to isolate network traffic with VLAN on managed switch

Learn step by step how to configure VLANs on a managed switch to segment your corporate network or homelab safely and efficiently.

Produtividade•3 min

How to compare two Excel spreadsheets and find errors

Learn how to quickly compare two Excel spreadsheets using conditional formatting and formulas for fast discrepancy audits in large datasets.

RedesHardware•4 min

No internet? How to test onboard network card using ping command

Learn how to step-by-step diagnose physical connectivity and driver failures in integrated network controllers using the ping command.

EletrônicaHardware•4 min

How to test an open thermal fuse with a multimeter on bench

Practical bench guide to identify open circuits and failures in thermal protection components using a digital multimeter safely.

EletrônicaHardware•4 min

How to test SATA power connector with a multimeter

Learn the step-by-step procedure to check 3.3V, 5V, and 12V lines on SATA power connectors in server power supplies and motherboards.

Redes•4 min

Wi-Fi dropping? How to use ping to find packet loss

Is your wireless connection constantly fluctuating? Learn how to run continuous ping tests to measure latency, jitter, and diagnose wireless interference.

EletrônicaHardware•5 min

How to test the AMS1117 regulator with a multimeter on bench

A practical bench guide to identify voltage drops, short circuits, and failures in the common AMS1117 linear regulator on development boards.

Automação•5 min

How to create Excel macros with VBA for automation

Learn step by step how to record and edit macros with VBA in Excel to eliminate repetitive tasks and streamline corporate data consolidation.

EletrônicaHardware•4 min

How to test 18650 lithium battery with a multimeter

Learn the complete step-by-step procedure to measure rest voltage, evaluate charge state, and detect damaged 18650 lithium cells in DIY projects and homelabs.

EletrônicaHardware•5 min

How to test a potentiometer with a multimeter on board

Learn the practical step-by-step guide to test analog potentiometers directly on the circuit board using a digital multimeter, identifying wear and discontinuities.