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

PC turns on no display: How to test RAM modules

Computer powers on but the screen stays black? Learn the step-by-step procedure to diagnose and troubleshoot boot failures caused by oxidized or faulty RAM modules.

Read article

Eletrônica•4 min

How to test motherboard PWM IC on the workbench

Learn practical diagnostic steps for motherboard PWM controller chips using a multimeter and oscilloscope to find voltage regulation failures in processor phases.

Read article

Eletrônica•5 min

How to test quartz crystal oscillator on circuit board

Learn the practical step-by-step guide to diagnose frequency failures in crystal oscillators using a multimeter with frequency counter and oscilloscope.

Read article

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.

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.

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.

HardwareEletrônica•5 min

Graphics card no display? How to test GPU power phases

Learn the step-by-step bench procedure to measure short circuits on VCore and memory power rails of graphics cards using a digital multimeter.

EletrônicaHardware•4 min

How to test motherboard VRM with a multimeter on the bench

Learn the step-by-step bench guide to test the VRM voltage regulator, find dead power phases, and identify shorted MOSFETs on desktop motherboards.

EletrônicaHardware•4 min

How to measure PC power supply consumption with a plug meter

Learn how to use a wall wattmeter on your workbench to monitor real power usage, spot current spikes, and audit ATX power supplies.

EletrônicaHardware•2 min

How to test optocouplers on a board: Practical guide

Learn how to diagnose optocouplers in switching power supplies using only a multimeter. Understand galvanic isolation and semiconductor bench testing.

EletrônicaHardware•3 min

Motherboard won't turn on? How to test the Super I/O chip

If your motherboard is dead, the Super I/O chip might be the cause. Learn how to trace power good and enable signals to troubleshoot energy management faults.