Build reliable beginner robots by testing sensing, motor power and control logic independently before combining them.
Keep motor power and logic power requirements in mind, and check the specifications of the exact driver and motors you use.
A motor driver switches the motor current while controller pins provide the logic signals. Verify the driver's current and voltage limits before connecting a motor.
Test: motor supply, common ground, enable pin, direction pins and PWM output.
Learn Arduino motor control →Review driver selection, wiring, PWM speed control and safety checks before assembling a robot.
Read the motor driver guide →Read each IR sensor independently first. Then map the sensor pattern to left, right, forward and stop behavior.
Test: sensor height, surface contrast, motor direction and turning behavior at low speed.
Build the line follower →Use distance sensing to trigger a mechanism, but add sensible limits so noisy readings do not repeatedly activate the motor.
Build the smart dustbin →Plan the target distance, mounting angle and response time before choosing a distance-sensing project.
Explore project ideas →A short hardware checklist can save hours of debugging.
Check polarity, battery condition and whether the supply can provide the motors' startup current. Do not power motors directly from microcontroller I/O pins.
Check the pin map, secure motor terminals and common ground where required. Disconnect power before changing connections.
Test one motor, one sensor and one behavior at a time. Log sensor readings and use low motor speed during initial tests.