Hi. We Might Have a Wiring Problem.
Arduino and robotics gear, guides, and builds worth your time.
Education
Start here if you’re new: dev environment setup, the basic tools every project needs, and programming guides to get you writing real code.
Gear & Reviews
Start here if you like buying things: honest breakdowns of boards, sensors, tools, and the rest of the workbench pile.
Project Highlights
Start here if you want inspiration: cool Arduino and robotics builds from around the internet, and the parts behind them.
Latest From the Blog
-
A Retro Arcade Cabinet Built Around an Arduino Mega
The Arduino Mega isn’t the brain of a retro arcade cabinet — a Raspberry Pi is. It’s the part that makes the cabinet feel alive: lit buttons, an RGB marquee, a coin door that clicks. Here’s the division of labor these builds actually run on, and the USB gotcha that catches almost everyone.
-
The SG90 Micro Servo: Still the Standard, or Time to Upgrade
The SG90 is in every starter kit and still costs about two dollars, but plastic gears and a 500-700 mA stall current set hard limits on what it can do. Here’s exactly where it still wins, where it fails, and when the metal-gear MG90S is worth the swap.
-
What’s the Difference Between Arduino and Raspberry Pi (and Which Do You Need)
Arduino is a microcontroller; Raspberry Pi is a computer. Here’s what that actually means for your project, why the Pi has no analog pins, and which one to buy first.
-
What Is PID Control, and Do You Actually Need It for Your Robot?
PID control is three lines of arithmetic with a scary reputation. Here’s what P, I, and D each do, when a hobby robot can skip it entirely, and the $12 sensor you’ll want when you can’t.
-
An Arduino Smart Doorbell Project, Step by Step
A $35 ESP32-CAM build that sends a photo of whoever is at your door straight to your phone, with no subscription and no cloud storage. Full parts list, the GPIO conflicts nobody warns you about, and why the power supply is the step that kills most builds.
-
Stepper Motors vs. Servo Motors vs. DC Motors: What to Use When
One question settles the choice between a stepper, a servo, and a DC gearmotor almost every time: does the shaft need to know where it is? Here is how to answer it, and which specific part to buy for each case.