5V vs. 3.3V Logic Levels, Explained: Why It Matters for Your Wiring
What “5V logic” and “3.3V logic” actually mean, why mixing an Uno and an ESP32 in the same circuit isn’t automatically safe, and how to fix it when it comes up.
Build a Home Weather Station With Arduino: Full Parts List and Guide
The complete parts list, wiring diagram, and code walkthrough for a working Arduino weather station — temperature, humidity, and dew point in about an hour.
Servos vs. DC Motors vs. Stepper Motors: The Basics Every Robot Builder Needs
Servos, DC motors, and stepper motors solve different problems. Here’s what actually separates them and how to pick the right one for your robot.
This Arduino-Powered Weather Station Puts Store-Bought Ones to Shame
A $30 Arduino and DHT22 build that outperforms most consumer indoor weather stations. Here’s how it works and why it’s better.
Arduino Not Detected by Your Computer? Here’s How to Fix It
Board not showing up in the Arduino IDE’s Ports menu? Work through these five causes in order — the actual problem is almost always the cable.
HC-SR04 Ultrasonic Sensor: Reviewed and Tested
We ran distance tests on the HC-SR04 ultrasonic sensor to see how accurate it really is, and where it starts to fall apart.
We Tested a $15 Arduino Starter Kit
The LAFVIN Basic Starter Kit promises a lot for $15. We unboxed it and tested the components to see what actually holds up — and what it doesn’t include.
The Best Arduino Starter Kits, Compared
We compared three price tiers of Arduino starter kits to find out which ones are actually worth buying, and which are just the same forty parts in different boxes.
Arduino Uno vs. Nano vs. ESP32: Which Board for Which Project
Uno, Nano, and ESP32 all run Arduino code, but they are not interchangeable. Here’s what actually separates them and which one fits your project.
Your First Arduino Project: Blinking an LED (and Why It Matters)
The classic first Arduino project, done properly with an external LED instead of the onboard one — plus what each line of the code is actually doing.