About Arduino Uno R3- Microcontroller ATmega328P, Operating Voltage : 5V,Digital I/O Pins, 14 (of which 6 provide PWM output), PWM Digital I/O Pins .6 Analog Input Pins .6.Flash Memory 32 KB (ATmega328P) of which 0.5 KB used by bootloader. About Bluetooth Module-Frequency: 2.4GHz ISM band, Default serial port setting 9600 1 pairing code 1234, Rate: Asynchronous 2.1Mbps (Max) or 160 kbps, Synchronous: 1Mbps or 1Mbps, Security Features: Authentication and encryption, Support Profiles: Bluetooth serial port (master and slave), About Utrasonic Sensor HC-SR04-Ultrasonic Ranging Module HC - SR04 Sensor has two main parts, a transducer that creates an ultrasonic sound and another listens to it's echo.Working Voltage: DC 5V Quiescent Current: 2mA Level Output: 5V high 0V low. About L293D Motor Drive Module-This module is a medium power motor driver perfect for driving DC motors and Stepper motors. It uses the popular L293D H-bridge motor driver IC. It can drive 4 DC motors in one direction, or drive 2 DC motors in both the directions with speed control. The driver greatly simplifies and increases the ease with which you may control motors, relays, etc from microcontrollers. It can drive motors up to 12 V with a total DC current of up to 600mA.
