Pocket Radar for Brick Worlds
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Description
Pocket Radar for Brick Worlds
A Real, Working Radar in Toy Form
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)
- Resistor (pin1) ↔ HC-SR04 Ultrasonic Sensor (ECHO)
- Wemos D1 Mini V4 (D6-GPIO12) ↔ Resistor (pin2)
- Wemos D1 Mini V4 (D4-GPIO2) ↔ MG90S (signal)
Software
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.
Bill of Materials
- LOLIN D1 mini V4.0.0 4MB WIFI https://www.aliexpress.com/item/1005006123456789.html
- HC-SR04 Ultrasonic Sensor https://www.aliexpress.com/item/1005007849944952.html
- OLED display 0.96 inch I2C 128x64 pixel driver SSD1306 https://www.aliexpress.com/item/1005006365881525.html
- MG90S Servo 180 degree all metal https://www.aliexpress.com/item/1005008626768357.html
- Resistor 8k2 1% 1/4W https://www.aliexpress.com/item/1005005336325827.html
- Screws M2x10mm (x12) https://www.aliexpress.com/item/1005006674812661.html
- Brass insert nuts M2xL3xOD3.2 (x6) https://www.aliexpress.com/item/1005006472702418.html
- PLA parts (x5) around 15g
(less than $14 updated January '26)
Final Thoughts
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. 🚀📡🧱
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Documentation (1)
License
You may create derivative works based on this object, provided that all such derivative works are published exclusively on the MakerWorld platform and include proper attribution to the original creator. You may not share, upload, host, distribute, or publish this object—or any derivative work of this object—on any other digital platform, marketplace, or distribution channel. Commercial use of this object and any derivative works is strictly prohibited. This includes, but is not limited to, selling, renting, sublicensing, or using the object in any context in which you receive monetary compensation or other financial benefits.
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