Know the Arduino Uno
Identify digital pins, analog inputs, power pins and USB connection before wiring a project.
Read the Arduino Uno R3 guide → Arduino Learning Hub
Learn Arduino.
Build real projects.
Start with the Arduino Uno, then learn sensors, motor drivers and practical robotics step by step.
A PRACTICAL LEARNING PATH
Learn in this order
Understand power and pins before adding components. Test one part at a time to make debugging easier.
Read a sensor output
Check the module voltage, pin labels and whether its output is digital or analog. Keep the wiring simple while testing.
Learn the HC-SR04 sensor →Drive a DC motor safely
Use a motor driver such as the L293D rather than powering a motor directly from an Arduino I/O pin.
Learn L293D motor control →Understand motor drivers
Compare L293D and L298N drivers, follow a wiring checklist, and learn direction and PWM speed control before building a robot.
Read the Arduino motor driver guide →Combine sensing and motion
Test sensor readings and motor direction separately, then combine them into project logic.
Build a line follower robot →TROUBLESHOOTING
Quick checks when a project fails
Before rewriting code, inspect the common causes below.
Board not detected
Try a USB data cable, select the correct board and port in the IDE, and install the required driver if the board needs one.
Sensor gives strange readings
Confirm VCC and GND, use the pinout for your exact module, check signal pin assignments and test with a short example sketch.
Motor does not turn
Check the motor-driver supply, common ground, enable pin and wiring. Motors often need a separate power source sized for their current.
NEXT STEP
Need Arduino components?
Find boards, sensors, motor drivers and robotics parts at Vayuyaan.