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
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Powering Your Arduino Project: Battery vs. USB vs. Wall Adapter
USB, barrel jack, or battery? Each one behaves differently once your project draws real current. Here is what each power path actually does, why 9V beats 12V, and why the 9V battery is the wrong answer.
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Wheels vs. Tracks vs. Legs: Choosing the Right Locomotion for Your Robot
Wheels, tracks, and legs each buy you something different, and each one bills you for it in battery life, code complexity, or both. Here is how to pick the right one for your robot before you spend three weeks finding out the hard way.
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Turn an Arduino Into a Simple Music Visualizer
A microphone module, a strip of addressable LEDs, and a short sampling loop will get you a music-reactive light bar this weekend. Here are the parts that actually work, the power and wiring gotchas that will bite you, and how to go from a loudness meter to a real frequency spectrum.
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Arduino Mega vs. Uno: Do You Actually Need the Extra Pins
Pin count is the least interesting difference between the Arduino Mega and the Uno, and it is the only one most guides discuss. Here are the three constraints that actually justify a Mega — and the cheap fix for the one that does not.
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Why Your Breadboard Circuit Isn’t Working (Even Though It Looks Right)
A dead breadboard circuit almost never means broken code or a broken part. It usually means one of six wiring assumptions quietly isn’t true. Here’s how to find which one, in the order worth checking.
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This Obstacle-Avoiding Robot Build Is a Perfect Weekend Project
A servo-mounted ultrasonic sensor turns a two-wheel chassis into the smallest build that contains a whole robot: sense, decide, act. Here’s how the sweep-and-pivot loop works, the HC-SR04 limits to design around, and what to buy for either route.