Ultrasonic 3D Wall Maze Robot | Full Assembly Guide (Arduino Nano + 3 Sensors)

Build your own maze-solving robot! In this video we assemble the Botics Ultrasonic 3D Wall Maze Robot step by step. Three ultrasonic sensors (front, left and right) measure the distance to the walls, and the Arduino Nano on the Botics Main Shield steers two N20 motors through the 3D wall maze. ⏱ CHAPTERS 0:00 Introduction 0:06 About the robot 0:14 Kit contents 0:23 Botics Main Shield V1 0:30 Ultrasonic expansion board 0:37 Sensor pin map 0:45 Technical specifications 0:54 How it works – Measure, Decide, Turn 1:12 Safety first 1:25 STEP 1 – Know your parts 1:43 STEP 2 – Prepare the chassis plate 1:59 STEP 3 – Fix the caster ball 2:18 STEP 4 – Mount the N20 motors 2:40 STEP 5 – Mount the ultrasonic expansion board 2:55 STEP 6 – Mount the Main Shield V1 3:09 STEP 7 – Connect the cable & motors 3:23 STEP 8 – Fit the wheels 3:36 STEP 9 – Connect the LiPo & power ON 3:55 Finished robot – Ready for the maze 📌 SENSOR PIN MAP Left sensor : TRIG A0 | ECHO A1 Front sensor : TRIG A2 | ECHO A3 Right sensor : TRIG A4 | ECHO A5 5V and GND are common to all three sensors. ⚙ TECHNICAL SPECIFICATIONS • Controller: Arduino Nano compatible, TQFP32 MCU, USB 2.0 Mini-B • Main shield: Botics Main Shield V1 (same as Line Follower Kit) • Motor driver: TB6612FNG, 2 DC motor outputs (J3, J4) • Motors: 2 × N20 DC gear motor • Sensors: 3 × ultrasonic (front, left, right) • Expansion link: 11-pin connector to the shield front connector • Supply voltage: 6.5 V – 8.4 V (LiPo 2S 7.4 V recommended) • Programming: Arduino IDE, C/C++ ⚠ SAFETY Keep the power switch OFF while assembling. Connect the LiPo with correct polarity. Never plug or unplug wiring while the robot is ON. Never puncture, short or over-charge a LiPo battery. Small parts – younger students need adult supervision. 📝 NOTE Assembly footage is sped up (3× to 5×) so the video stays short. 🔗 Kit / Code / Links: [add your link here] If this video helped you, please Like 👍, Subscribe 🔔 and share your build with us! #ArduinoRobot #MazeRobot #UltrasonicSensor #ArduinoNano #Botics #RoboticsForKids #STEMEducation #DIYRobot