In this project, we will build a two wheeled robot based on the Nordic nRF51822 BLE SoC. Motor control for the two wheels of the robot will be done using an L293D chip. The robot can be controlled using any mobile device that has BLE, and when not connected, it switches to an autonomous mode, avoiding obstacles using an HC-SR04 ultrasonic sensor.
The nRF51822 module adapter PCB used in this project was design by me in collaboration with my friend Sandeep. It's available for purchase on Tindie:
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