Hands-on IoT and robotics builds

Discover creative projects and step-by-step tutorials

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[background image] image of a bike workshop (for a bicycle shop)

image of code on a computer screen (for a legal tech)

image of webinar setup (for a blockchain and cryptocurrency)

Robots and IoT, built on my bench

I clicked a spot on a map. This robot went there by itself.

Go on, click the map. It's the real one my Arduino-powered JetBot drew with its lidar. I'm Happy, and I build things like this and show you how.

Watch the build See all builds

The finished JetBot on a green cutting mat, with a round lidar on top

Top view of the chassis with the wheels and wiring

Lidar seen from directly above the robot

Latest build · October 2026

An Arduino that maps the room and drives itself.

The kit was designed for a Jetson. I took the Jetson out.

The UNO Q runs Linux, so it can run ROS2 too. One USB cable connects it to the motors, the motion sensor and the lidar. I drive it once to make the map, then click where I want it to go.

BrainArduino UNO Q

ChassisWaveshare JetBot kit

LidarRPLIDAR A1, about 7 spins a second

MappingSLAM, about 5 minutes of driving

AccuracyFinds itself on the map to about 9 cm

Read the build guide Watch the video

I'm Happy. I build it, then I show you how.

You don't need fancy equipment or years of experience. You need curiosity and a willingness to try. I share what works and what doesn't, so you can get to the fun part faster.

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DIY tech made simple

Hands-on IoT and robotics builds

See what I’ve built

I clicked a spot on a map. This robot went there by itself.

An Arduino that maps the room and drives itself.

Pick a build. Follow along.

Arduino Uno Q robot: lidar mapping and autonomous navigation

ROS2 SLAM and navigation: MentorPi M1 solves a maze

Build a 3D map with RTAB-VSLAM on Raspberry Pi 5

Build your own offline AI assistant with M5Stack

M5Stack Tab5 Arduino tutorial: libraries and upload

Build your own ambient day clock on M5Stack Tab5

I built a talking e-paper clock with an ESP32

One cable laser rangefinder

LoRa Arduino tutorial: two boards, live signal, no soldering

micro-ROS ESP32 robot: drive a RoverC Pro with a gamepad

I'm Happy. I build it, then I show you how.

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