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Robot Car Chassis

DIY 2WD Smart Robot Car Chassis Kit (Round, with Code Disk)

Entry-level 2-wheel-drive round acrylic chassis with 2 BO gear motors, wheels, caster and speed-encoder disk; a popular beginner robot base for Arduino/ESP32 builds.

₹399 + 18% GST

SKU: BOTBIT-ROB-01 · Best for: First Arduino/ESP32 robot car for beginners

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Overview

About DIY 2WD Smart Robot Car Chassis Kit (Round, with Code Disk).

The DIY 2WD Smart Robot Car Chassis Kit is the single most popular starting point for beginner robotics in India. It is a round transparent acrylic base that comes with two BO gear motors, two rubber wheels, a free-rolling caster wheel for balance, and the mounting hardware to bolt it all together.

This particular kit includes speed-encoder (code) disks, which slot onto the motor shafts so you can add IR speed sensors for measuring RPM, speed and distance. That makes it more capable than the bare round chassis and ideal for line-follower and PID-control learning projects.

At around Rs 399, it is the classic first robot base for Arduino, ESP32 and Raspberry Pi builders. The round acrylic plate has plenty of pre-cut holes for mounting a driver board, battery holder, sensors and the controller, so you can build a working robot car in an afternoon.

Key features

Why it stands out.

Round transparent acrylic chassis plate with many pre-cut mounting holes

Two BO geared DC motors (3-6V) plus two 65mm rubber wheels

Free-rolling caster/universal wheel for a stable 3-point stance

Speed-encoder code disks included for RPM/distance sensing

Complete fastener set: screws, nuts, spacers and motor clamps

Fits L298N/L293N drivers, battery holders and common controllers

Specifications

Selection facts.

Drive configuration	2WD (two driven wheels)
Chassis material	Transparent acrylic (round)
Motors	2 x BO gear motor, 3-6V
Wheels	2 x 65mm rubber wheels + 1 caster
Encoder	Speed-encoder code disks included
Motor voltage	3V to 6V DC
Recommended power	6V (4xAA) or Li-ion pack
Hardware	Screws, nuts, spacers, motor clamps
Chassis diameter	~12-13 cm (approx.)

Applications

Where it is used.

First Arduino/ESP32 robot car for beginners
Line-following robots using IR sensor arrays
Obstacle-avoidance robots with ultrasonic sensors
Bluetooth/WiFi remote-controlled cars
Speed and distance measurement with encoder disks
School and college robotics workshops and exhibitions

Buying guide

How to choose.

Choose this 2WD round kit if you are building your first robot car and want the cheapest, simplest, most-supported base. Nearly every beginner tutorial online uses this exact chassis, so wiring guides, code and troubleshooting are easy to find. The included encoder disks make it a slightly better buy than kits without them.

2WD is lighter and cheaper than 4WD and turns easily using differential (tank-style) steering, but it has less traction and pulling power. If your project needs to climb ramps or drive on carpet and rough floors, consider the 4WD version instead.

To finish a working robot you will also need a motor driver (L298N is the usual pick), a microcontroller (Arduino UNO or ESP32), a battery holder with cells, and jumper wires. Add IR line sensors or an HC-SR04 ultrasonic sensor depending on your project.

FAQ

Common questions.

What exactly comes in the box?

You get the round acrylic chassis plate, two BO gear motors, two rubber wheels, one caster wheel, two speed-encoder code disks, and a full set of screws, nuts, spacers and motor clamps. A controller, driver and battery are not included.

Do I need a motor driver?

Yes. The BO motors cannot be driven directly from Arduino pins. Use an L298N or L293D motor driver between your microcontroller and the two motors.

Is it compatible with Arduino and ESP32?

Yes. The chassis is controller-agnostic. Arduino UNO, Nano, ESP32 and Raspberry Pi all work; you just mount your chosen board and driver on the acrylic plate.

What are the encoder disks for?

The slotted code disks mount on the motor shafts. Paired with IR speed-sensor modules, they let you count pulses to measure wheel RPM, speed and travelled distance for closed-loop or PID control.

What battery should I use?

A 6V pack (4xAA holder) is the simplest option; many builders use a 7.4V 2S Li-ion pack with the L298N. Match the supply to your motor driver and keep motor and logic grounds common.

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Transparent double-layer 4WD chassis with 4 BO geared motors and wheels, battery holder and fasteners; popular sturdier alternative to the 2WD base.

₹567 + 18% GST

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Robot Car Chassis

Robocraze DIY 4-Wheel Drive Robot Smart Car Chassis Kit with Speed Encoder (Longer Version)

Longer two-layer 4WD platform with 200 RPM TT gear motors and speed-encoder disks; a roomy, stable base for line-follower, obstacle-avoidance and PID robotics projects.

₹850 + 18% GST

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Tracked tank-style crawler chassis with rubber caterpillar tracks and dual TT motors for all-terrain robot builds.

₹949 + 18% GST

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DIY UNO Project Smart Robot Car Kit V3.0 (Line Tracking + Obstacle Avoidance + Bluetooth)

Complete 4-in-1 learning robot car with UNO R3, IR line-tracking, ultrasonic obstacle avoidance, IR remote and Bluetooth app control; XH2.54 plug-and-play modules.

₹6,039 + 18% GST

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