How to Choose a Robot Car Kit for Your Arduino Build
Choose the robot kit by the chassis first, then the motors and driver. The mecanum chassis kit costs $47.11 with 60mm omni wheels and TT motors. The smart car chassis kit costs $48.22 with a speed encoder and battery box. The L298N driver runs 2 motors at 2A per bridge for $7.17.
Quick facts
| Fact | Value |
|---|---|
| Mecanum chassis | $47.11, 60mm omni wheels, TT motors |
| Smart car chassis | $48.22, 4WD, speed encoder, battery box |
| TT motor set | $9.63, 3 to 6V, 1:48, 800 gf cm |
| L298N driver | $7.17, 5 to 35V, 2A per bridge |
| HC-SR04 sensor | 2 to 450 cm, 0.3 cm precision, $4.01 |
| UNO R3 board | $9.27, ATmega328P, 16MHz |
Which chassis kit fits your build?
The mecanum kit costs $47.11 with 60mm omni wheels, and the smart car kit costs $48.22 with a speed encoder.
The mecanum kit uses an aluminum alloy chassis with TT motors. Its 4WD double layer kit costs $47.11, and its single layer kit costs $50.99.
The smart car kit gives 2WD or 4WD with an L298N driver, ultrasonic and tracking modules, and a UNO R3 board. Its 4WD kit costs $48.22, and its 2WD kit costs $60.99.
Which motors drive the wheels?
The TT motor set gives 2 motors and 2 wheels for $9.63.
Each motor runs on 3 to 6V DC with a 1:48 gear ratio. It gives 800 gf cm of torque through the gearbox.
The 65mm wheels fit the motor shafts with no extra adapter. Mount one motor on each side for a 2-wheel drive car.
Which driver runs the motors?
The L298N driver runs 2 DC motors at 2A per bridge for $7.17.
It takes 5 to 35V and drives 2 DC motors or 1 stepper motor. A built-in 5V regulator feeds the logic side.
A 2-pack costs $12.65, and a 4-pack costs $25.99. Keep one spare for the next build.
Which sensors steer and stop the car?
The HC-SR04 sensor measures 2 to 450 cm ahead with 0.3 cm precision.
It runs on 5V and costs from $4.01, with a module-only option at $5.25. The IR sensor stops the car 2 to 30 cm from an object for $6.20 per 5-pack.
The TCRT5000 tracks a line at 1 to 25 mm with a digital output. Its 4-pack costs $7.02 for a line-following car.
Which board controls the kit?
The UNO R3 board controls the kit for $9.27 with an ATmega328P chip at 16MHz.
It gives 14 digital pins and 6 analog inputs. That is enough pins for a sensor, a driver, and a display at once.
The Nano board costs $10.96 with an ATmega328PB chip and Type-C USB. Pick the Nano when the car needs a smaller board.
How the options compare
| Part | Key spec | Price |
|---|---|---|
| Mecanum chassis, 4WD double | 60mm omni wheels, TT motors | $47.11 |
| Mecanum chassis, 4WD single | 60mm omni wheels, TT motors | $50.99 |
| Smart car chassis, 4WD | Speed encoder, battery box, UNO R3 | $48.22 |
| Smart car chassis, 2WD | Speed encoder, battery box, UNO R3 | $60.99 |
| TT motor set | 3 to 6V, 1:48, 800 gf cm | $9.63 |
| L298N driver | 5 to 35V, 2A per bridge | $7.17 |
| HC-SR04 sensor | 2 to 450 cm, 0.3 cm precision | From $4.01 |
| UNO R3 board | ATmega328P, 16MHz, 14 digital pins | $9.27 |
How do you build the robot car kit?
- Assemble the chassis plates with the hardware in the kit.
- Mount the TT motors and wheels on the chassis.
- Wire the L298N driver to the motors and the battery pack.
- Fit the HC-SR04 sensor on the front of the car.
- Connect the driver and sensor to the UNO board.
- Load the sketch and test the car on the floor.
Parts that fit this guide
In-stock parts ship from the New York, USA warehouse in 1-2 business days. Prices below are the live store prices we verified on November 10, 2026.
EQV Mecanum Wheel 4WD Robot Car Chassis Kit, Aluminum Alloy, 60mm Omni Wheels ($47.11)
Mecanum chassis kit at $47.11 for the 4WD double layer kit. It uses an aluminum alloy chassis with 60mm omni wheels and TT motors.
Smart Robot Car Chassis Kit with Speed Encoder and Battery Box for Arduino, 2WD / 4WD ($48.22)
Smart car chassis kit at $48.22 for the 4WD kit. It gives a speed encoder and battery box with an L298N driver and UNO R3 board.
TT Motor 130 Gear Motor + 65mm Wheel Set, 2 Motors + 2 Wheels, 3-6V DC, for Arduino Smart Car Robot ($9.63)
TT motor set at $9.63. It gives 2 motors and 2 wheels on 3 to 6V DC, with a 1:48 gear ratio and 800 gf cm of torque.
L298N Dual H-Bridge Motor Driver Module for Arduino, DC / Stepper, 5-35V, 2A ($7.17)
L298N driver at $7.17 for 1 piece. It runs 2 DC motors or 1 stepper motor at 2A per bridge on 5 to 35V.
HC-SR04 Ultrasonic Ranging Sensor Module for Arduino, 2-450cm, with Mounting Bracket Options ($4.01)
HC-SR04 sensor at $4.01 listed, with a module-only option at $5.25. It measures 2 to 450 cm with 0.3 cm precision on 5V.
Shop the full range: Robot Chassis and Kits at Quality RC Parts. See also: Related guide.
Frequently asked questions
Which robot chassis kit costs the least?
The mecanum 4WD double layer kit at $47.11. The smart car 4WD kit costs $48.22.
What motors drive the robot car wheels?
The TT motor set at $9.63. It gives 2 motors and 2 wheels on 3 to 6V DC with a 1:48 gear ratio.
What driver runs the car motors?
The L298N driver at $7.17. It runs 2 DC motors at 2A per bridge on 5 to 35V.
Which sensor stops the car at a wall?
The HC-SR04 sensor, listed from $4.01. It measures 2 to 450 cm with 0.3 cm precision.
Sources
- Adafruit motor shield guide
- SparkFun L298N motor driver datasheet
- HC-SR04 ultrasonic sensor datasheet
Last updated: November 10, 2026.