DIY Voice-Controlled Obstacle Avoiding Robot Using Arduino

The DIY Voice-Controlled Obstacle Avoiding Robot is an integrated embedded system orchestrated by an Arduino Uno microcontroller. At the core of the power architecture, a dedicated power supply and battery pack deliver the necessary voltage to both the logic-level components and the power-hungry motors. Because microcontrollers cannot supply enough current to drive DC motors directly, a motor driver acts as an intermediary interface, receiving low-current control signals from the Arduino Uno and switching higher currents from the battery pack to actuate the motors mounted on the chassis. For autonomous navigation, obstacle avoidance sensors continuously scan the environment, feeding distance or presence data back to the Arduino Uno. If an obstruction is detected within a specified threshold, the microcontroller overrides standard movement to alter the robot's trajectory. Simultaneously, a Bluetooth module receives wireless serial data transmitted from a smartphone running a Bluetooth controller app. This wireless link allows the user to send manual steering commands or trigger voice-recognition routines interpreted by the mobile app and relayed to the Arduino. Using the Arduino IDE software loaded onto the board, custom firmware processes these diverse inputs—prioritizing safety sensor interrupts alongside remote Bluetooth instructions—to dynamically manage motor speed and direction.