Category
Electronics
15 articles
RISC-V: the free chip that could be hardware's Linux
RISC-V is the open, royalty-free chip architecture challenging ARM and x86. What it is, why it's growing so fast, and where you already use it without knowing.
How USB-C works and why one cable charges fast
All USB-C cables look the same, but they aren't: we explain the e-marker chip and why one charges at 240W while another barely reaches 15W.
ESP32 vs Arduino vs Raspberry Pi Pico: which to choose
A clear comparison of the ESP32, Arduino and Raspberry Pi Pico: how they differ, which one fits your project and what each board actually costs.
ESP32 from scratch: which board to buy and what to build
A beginner's guide to the ESP32: which board to buy for your project, how the S3, C3 and C6 models differ, and what you can actually build with each.
How Apple's AirTag ACTUALLY Works
Apple's AirTag doesn't transmit over long distances like many believe; here's how it really finds lost items using BLE and a vast Find My network.
YuboxNow: equip your ESP32 board with its own LoRaWAN configuration and support Web interface
Embed a configuration web interface on your ESP32 just like a router, with built-in WiFi and LoRaWAN support for your next open-source IoT project.
5 Essential elements in my electronics workshop
The 5 essential tools every electronics workshop needs, with the exact makes and models I trust after years of building circuits and inventions.
Raspberry Pi vs Arduino. Which is better?
Differences between Arduino and Raspberry Pi. When to use one or the other? We explain here the pros and cons of each of them.
Emergency charger for Macbook Pro. In case you lost the original.
Forgot your MacBook Pro charger? I reverse-engineered the USB-C voltage trick that tricks the laptop into charging from a lab power source.
How to Make a Cell Phone Charger for Emergencies?
Stuck with a dead phone while camping? Build an emergency charger from 4 AA batteries, a stripped cable and even pencil lead as a resistor.
Harvesting energy from radio waves (Energy harvesting). A technology that we already used more than a century ago.
Harvesting energy from radio waves sounds like the future, yet a battery-free crystal radio was already doing it back in the 19th century.
¿Cómo funciona un amplificador a tubos de vacío (Válvulas)?
How a vacuum tube amplifier works, explained stage by stage through a beautiful 1950s Pathfinder amp, from the rectifier to the power output.
Weather station with Arduino MKR1000
Build a DIY weather station with the Arduino MKR1000 to publish real-time temperature, humidity, and pressure to the web over WiFi from anywhere.
How to make a USB car charger (car) and how a DC voltage reducer works
When my car charger died, I took it apart to show how to build a USB car charger and how a DC voltage reducer works using the MC34063 chip.
High voltage source with recycled parts
Building a high voltage source of tens of thousands of volts from recycled parts, salvaging a flyback transformer out of a dead CRT monitor.