Pocket Radar for Brick Worlds was created to bring real-world technology into the world of imaginative play. By combining electronics, programming, and brick-based construction systems, this project turns a compact device into a fully functional, interactive mini radar that is both educational and incredibly fun.
This is not just a toy. It’s a hands-on STEM project, designed to spark curiosity, creativity, and learning while remaining simple, affordable, and accessible.
A Real Radar, in a Pocket-Sized Format
At the core of Pocket Radar for Brick Worlds is an ultrasonic distance sensor, based on the same principles used in real radar systems, automotive parking sensors, and autonomous robots.
The sensor emits high-frequency sound pulses and measures the echo return time to calculate object distance with impressive accuracy.
A microcontroller processes this data and displays it on a full-color screen, creating a realistic radar-style interface featuring:
animated scanning arcs
real-time object detection
distance indicators
dynamic and responsive graphics
All of this fits into a compact, brick-compatible enclosure, perfectly suited for brick cities, space bases, science labs, or futuristic environments.
Realistic Experience, Simple Construction
One of the project’s biggest strengths is its perfect balance between realism and simplicity.
Realism
Radar-inspired graphical interface
Real object detection (hands, figures, obstacles)
Instant response and smooth animations
Immersive and believable radar behavior
Simplicity
Very low-cost electronics (only a few dollars)
Components easily sourced from AliExpress
No complex soldering required
Clean, minimal wiring
Simple and well-commented Arduino code
This makes the project ideal for:
beginners in electronics
first-time Arduino users
parents building together with children
makers looking for a quick but rewarding build
Easy to Build, Designed for Everyone
The enclosure is 3D printed and carefully designed to:
securely hold all electronic components
remain compact and durable
integrate seamlessly with brick-based building systems
Assembly is straightforward and fully documented:
detailed wiring schematics
complete bill of materials
step-by-step assembly video
ready-to-upload firmware using Arduino IDE
In just a short time, a small set of parts becomes a fully working radar, ready to explore the surrounding world.
Pocket Radar assembly
Smartphone Connectivity: Play Becomes Interactive
Pocket Radar for Brick Worlds can connect to a smartphone, unlocking additional interactive features:
live sensor data visualization
alternative radar views
adjustable settings such as range, scan speed, and sensitivity
opportunities to experiment and customize behavior
This connectivity transforms the radar into a smart, interactive device, extending play and learning far beyond the physical model.
Learning Through Play
Children (and adults!) love this project because:
it reacts to real-world movement
objects instantly appear on the radar display
radar technology becomes intuitive and visual
learning happens naturally through experimentation
At the same time, the project encourages:
logical thinking
problem-solving skills
scientific curiosity
creativity
hands-on technological confidence
It’s the kind of build that leads to a proud moment: “I built this myself — and it really works!”
A Special Note for Parents 👨👩👧👦
Pocket Radar for Brick Worlds was also designed with parents and educators in mind.
Why Parents Appreciate It
Encourages STEM learning through play
Promotes active, hands-on engagement instead of passive screen time
Perfect for parent–child collaboration
Helps children understand real-world sensing technology
Builds confidence by creating something functional from scratch
Safe and Thoughtful Design
Low-voltage electronics
Simple, robust components
No dangerous parts or advanced tools required
Clear instructions and guided assembly
This makes it ideal for:
home learning
weekend family projects
school science activities
makerspaces and STEM clubs
What’s Included in the Project
By downloading Pocket Radar for Brick Worlds, you get:
3D-printable enclosure files
complete wiring schematics
full bill of materials
step-by-step assembly video
Arduino IDE firmware
a strong foundation for future upgrades and customization
Electronic circuit
Wiring diagram
Ground Connections:
Wemos D1 Mini V4 (GND) ↔ MG90S (GND)
Wemos D1 Mini V4 (GND) ↔ HC-SR04 Ultrasonic Sensor (GND)
Wemos D1 Mini V4 (GND) ↔ oled (GND)
Power Connections:
Wemos D1 Mini V4 (VBUS) ↔ MG90S (5V)
Wemos D1 Mini V4 (VBUS) ↔ HC-SR04 Ultrasonic Sensor (VCC)
Wemos D1 Mini V4 (3V3) ↔ oled (VCC)
Data Connections:
Wemos D1 Mini V4 (D1-GPIO5) ↔ oled (SCL)
Wemos D1 Mini V4 (D2-GPIO4) ↔ oled (SDA)
Wemos D1 Mini V4 (D5-GPIO14) ↔ HC-SR04 Ultrasonic Sensor (TRIG)
Below on this page (section Documents) you can download the software to load onto the Wemos D1 mini V4.0.0 via the Arduino IDE. This software, in addition to managing Pocket Radar, will create a Wi-Fi network called “Pocket_Radar” with the password: “12345678”.
By searching for the page 192.168.4.1, you can view the radar on your smartphone or change some settings.
Pocket Radar for Brick Worlds is more than a toy. It’s a bridge between imagination and real technology, combining learning, creativity, and play in a compact and affordable project.
Small in size. Big in potential. Ready to scan the world — one sweep at a time. 🚀📡🧱
Carletto73
