The circuit is built around an ATmega328 controller, ultrasonic transceiver module HC-SR04, Bluetooth module JY
MCU BT, motor driver L293D (IC1), DC motors M1 and M2, and a few common components. Thecircuits uses two
9V batteries-one to power the ATmega328 controller and the other to power the motors. Regulated 5V supply for the
rest of the circuit is provided by the ATmega328 controller itself. LED on the board indicates presence of power
supply