A first robot car is the project that hooks most people on electronics. But it needs several parts that must work together — get one wrong and it won’t move. Here’s exactly what to buy.
The parts, and how they fit together
| Part | Job | Recommended |
|---|---|---|
| Chassis + motors + wheels | The body that moves | 4WD chassis kit |
| Motor driver | Lets Arduino run the motors | L293D shield |
| Controller | Runs the code | Arduino Uno |
| Sensor | Makes it react | HC-SR04 / IR |
| Power | Runs the motors | 18650 cells |
1. Chassis, motors and wheels
The easiest start is a ready-made chassis kit — it includes the frame, the TT gear motors and wheels, all matched to fit. Buying a frame, motors and wheels separately works too, but a kit removes the guesswork for a first build.
2. The motor driver
An Arduino pin can’t power a motor, so you need a driver in between. For small TT motors the L293D shield is the tidiest choice — it plugs onto the Uno and drives all four motors. Heavier robots want the L298N. Our L298N vs L293D guide explains the choice.
3. The brain and the senses
The Arduino Uno runs everything. To make the robot do something, add a sensor: an ultrasonic sensor for an obstacle-avoiding robot, a line sensor for a line-follower, or an HC-05 for a Bluetooth-controlled car.
4. Power it properly
Motors are hungry. Don’t try to run them from the USB port — use a battery pack (18650 cells are ideal) through the driver, power the Arduino from the same pack or its own, and join the grounds. Underpowering is the number-one reason a first robot “won’t move”.
Frequently asked questions
2WD or 4WD for a first robot?
Both work. 4WD has more grip and looks impressive; 2WD is lighter, cheaper and simpler to wire. Either is fine to learn on.
Why won’t my robot move?
Usually power: the motors need a battery through the driver, not the Arduino’s 5V pin. Check the driver’s enable jumpers too.
Can I add a phone control later?
Yes — add an HC-05 Bluetooth module and a simple app. See our Bluetooth robot car guide.
Related guides
Get your robot parts
Everything here is in stock at Smart Home | Arduino Corner — Shaheen Market, DAV College Road, Rawalpindi — with same-day delivery in the twin cities and cash on delivery across Pakistan. Start with a 4WD chassis kit and an L293D shield, or browse all robotics kits and motors & drivers. Tell us what your robot should do and we’ll list the parts.