Building a UWB Distance Monitoring and Alert System with Arduino
Measuring the distance between two points wirelessly can be useful in proximity detection, object monitoring, and embedded automation projects. Whil…
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The wire gauge trap: why 18 AWG carries 16 A and your LED strip still browns out
Your LED strip works at the bench. Then you mount it behind a shelf, run it off a 5 m reel, and the far end comes out pink . You check the power sup…
Interfacing RC522 RFID Module with Arduino UNO
RFID, or Radio Frequency Identification, is a wireless technology used to identify objects without requiring direct physical contact. RFID systems a…
I Just Started Learning Electronics — Here Are the Components I’m Finally Beginning to Understand ⚡
Hi DEV Community! 👋 I’m Sadie Rose , a first-year electronics student from New York, and I recently started seriously learning about electronics. Wh…
FR-4 PCB Material: Properties, Grades, and Specification Guide for Engineers
Reviewed by AtlasPCB Engineering Team What FR-4 Actually Is — And What It Is Not Every PCB designer has written "FR-4" on a fabrication drawing. Mos…
What Actually Happens Between "Export Gerbers" and a Physical PCB Showing Up at Your Door
If you've ever designed a board in KiCad, EasyEDA, or Altium, clicked "Export Gerbers," uploaded a zip file to a fab house, and then a couple weeks…
Tesla Built the First Wireless Remote Control
In 1898, years before radio broadcasting existed and decades before anyone used the word "electronics," Nikola Tesla stood in front of a crowd at Ma…
A firmware fix instead of a recall: root-cause engineering for a deployed wearable
The wearable was already in the market, on athletes, when the reports started. Units power-cycling at random. Unreliable charging while docked. Data…
Why ARM Chips Power Nearly Every IoT Device
Look inside almost any modern connected device -- a smartphone, a smartwatch, a Wi-Fi thermostat, a battery-powered sensor node -- and you will find…
The First Digital Camera Was Built in 1975
Every camera-equipped connected device you build today, from a smart doorbell to an ESP32-CAM streaming frames over Wi-Fi to a factory machine-visio…
4 Cool Open-Source Hardware Projects to Spark Your Next Build
tags: hardware, iot, opensource, electronics As software developers, many of us reach a point where writing code inside a virtual environment isn't…
Why HDI PCB Manufacturing Starts Long Before the First Hole Is Drilled
Why HDI PCB Manufacturing Starts Long Before the First Hole Is Drilled When people think about PCB manufacturing, they usually imagine drilling, pla…
Ethernet Was Invented in 1973 at Xerox PARC
Every office network, every data center, and a surprising amount of factory-floor automation still runs on a technology that was sketched out in a m…
The 555 Timer: The Most Popular Chip Ever Made
Ask a room full of engineers to name the most popular integrated circuit ever made and you will hear guesses about famous microprocessors or memory…
How a Hollywood Star Helped Invent Wi-Fi
One of the most important ideas in modern wireless communication did not come out of a corporate research lab or a defense contractor. It was patent…
Why IoT Modules Still Use 1981 AT Commands
If you have ever wired up a cellular modem, a WiFi module, or a Bluetooth radio and typed something like AT+CGMR into a serial terminal, you have us…
Memory Chips
Memory Chips Supply chain strategy from electronics production engineering, 500–50k units/year Introduction "Order from Digi-Key" is a prototyping s…
Why Bluetooth Is Named After a Viking King
Pick up almost any connected gadget today and you will find it somewhere: a pair of wireless earbuds, a fitness band, a smart speaker, a car stereo.…
The First Visible LED Glowed Red
Look at almost any piece of electronics on your desk and you will find a small light staring back at you. A router with a row of blinking status lig…
The First IoT Device Was a Vending Machine
Ask most people to picture the first Internet of Things device and they imagine something sleek: a smart speaker, a fitness band, a Wi-Fi thermostat…
MAX20151R: The 40V, 500mA Ultra-Low-Noise LDO That Silences Power Rails
Why 40V Input and 500mA Output Matter in Noise-Sensitive Designs You’ve probably fought a power rail that looked clean on a multimeter but still tra…
The MOSFET: The Most Manufactured Device in History
Ask someone to name the most manufactured object in human history and you will hear guesses like the nail, the brick, or maybe the smartphone. The r…
Who Coined the Term Internet of Things?
The Internet of Things is now a phrase you see on product boxes, in boardroom slide decks, and across thesis titles in engineering departments every…
The First Integrated Circuit Was Built in 1958
Almost everything that makes the modern world hum, from the phone in your pocket to the sensor on a factory floor, traces back to a single quiet aft…
My Journey from Electronics Student to Embedded Hardware Engineer
Hello everyone! 👋 My name is Vishal Kumar Sahni, and I currently work as an Embedded Hardware Engineer at Teravolt. I am passionate about embedded s…
Network Transformer Selection for IoT Ethernet: PHY Compatibility, EEE, and Low-Power Design
IoT Ethernet designs have different transformer requirements than standard networking equipment. Here's the complete technical reference for IoT- sp…
The First Microprocessor Was Built for a Calculator
Every connected device on your desk, from a smart plug to a fitness band to a hobbyist ESP32 board, runs on a descendant of one tiny chip that was n…
Tesla's Radio-Controlled Boat: The First Remote Control
When people imagine the first remote control, they picture a plastic clicker pointed at a television. The real thing arrived decades earlier, ran on…
Why the QR Code Was Invented to Track Car Parts
You scan one to pay at a sari-sari store, pull up a restaurant menu, or board a flight. The QR code has quietly become one of the most universal pie…
Building a Simple Circuit Resistance Calculator in C++ (and a logic trap to avoid)
Every programmer has, at some point, fallen into a logical trap. While building a simple console-based electrical circuit simulator in C++, I stumbl…