Arduino Programming Basics : Part 6 (HINDI): POT, Buzzer, Ultrasonic, RC-Servo

Analog Input
Interfacing Potentiometer (variable resistance like Radio's volume Control!) with Arduino
Interfacing a Buzzer with Arduino and generating tunes / ring-tones!
Interfacing Ultra-Sonic Distance Sensor (HC-SR04) with Arduino
Interfacing commonly found Hobby RC-Servo motors with Arduino