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Tutorials, news, and one component explained simply — every day.
Friday, March 28, 2026
🔧 Featured Project
A maker has built a simple optocoupler tester circuit for fault detection
.
Optocouplers frequently fail without visible damage
, making this handy diagnostic tool perfect for any electronics bench. The circuit uses basic components and helps you quickly verify whether your optocouplers are still functioning properly—no more guessing if that PC817 is dead or just disconnected.
This optocoupler tester verifies PC817 functionality by applying a test signal to the LED input and monitoring the isolated output transistor response, helping diagnose invisible component failures.
📰 Electronics News
Memory Chip Shortage May Last Until 2030
SK Group’s chairman says the global memory chip shortage is likely to persist another four to five years, with leading players like SK Hynix expanding capacity but unlikely to fully meet demand till around 2030
.
Industry-wide supply of wafers is lagging demand by more than 20%
.
Source: Bloomberg
Memory chip demand outpaces supply by over 20% through 2026, with the gap gradually closing as manufacturers expand wafer production capacity, reaching equilibrium around 2030.
IBM and Lam Research Partner on Sub-1nm Chip Technology
IBM and Lam Research announced a collaboration aimed at developing new processes and materials to support sub-1nm logic scaling, focusing on novel materials, fabrication processes, and High-NA EUV lithography processes
.
Under the five-year agreement, the companies intend to extend logic scaling to the sub-1nm node
.
Source: IBM Newsroom
Diodes Inc. Launches Programmable Buck Converter for Automotive
Diodes Incorporated introduced the AP61406Q, a 5.5V, 4A automotive-compliant synchronous buck converter with I2C interface that allows programming of various parameters for compact design and high efficiency in automotive point-of-load applications including infotainment, instrument clusters, telematics, and ADAS
.
Source: Diodes Incorporated
📚 Tutorial Spotlight
Want to connect your ESP32 to the internet and post real sensor data to a dashboard? Our latest tutorial walks you through setting up Wi-Fi, making HTTP POST requests, and building a simple web interface to visualize your sensor readings in real-time. Perfect for IoT beginners ready to take the next step.
→ Read the full ESP32 Wi-Fi tutorial
🔌 Component of the Week: MOSFET
The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) is the workhorse of modern electronics. Unlike bipolar junction transistors, MOSFETs are voltage-controlled devices with extremely high input impedance, making them ideal for switching applications. They come in N-channel and P-channel variants, each with enhancement or depletion modes. MOSFETs excel at high-speed switching with minimal power loss, which is why they dominate power supplies, motor drivers, and amplifier circuits. The three terminals—gate, drain, and source—control current flow through an electric field rather than current, resulting in virtually zero gate current draw. When selecting a MOSFET, pay attention to parameters like RDS(on), gate threshold voltage, and maximum drain-source voltage to match your application’s requirements perfectly.
MOSFETs are voltage-controlled switches fundamental to modern electronics, featuring three terminals (Gate, Drain, Source) and operating by controlling current flow through gate voltage, making them ideal for power control, digital logic, and amplification.
💬 From the Community
A Redditor shared their experience building a
hand gesture control robot using OpenCV
, replacing traditional buttons and joysticks with natural hand movements for a more intuitive control experience.
→ Join the discussion on r/arduino
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Can a Memory Chip Shortage Really Last Until 2030?
Free Daily Electronics Newsletter
Tutorials, news, and one component explained simply — every day.