Description

This project involved the creation of a robot capable of movement and obstacle detection. The base robot chassis contains two DC motors, and the obstacle detection capability uses a pair of servos attached together to achieve pan and tilt motion. The Adafruit Bluefruit LE module is used to achieve Bluetooth connectivity, and the demonstration video used the iOS Bluefruit LE application developed by Adafruit for the Bluefruit module. In the application, the directional arrows control the robot's movement and the accelerometer readings control the servo pair's pan and tilt positioning. The distance sensor checks for any objects within six inches, and if an object is detected, the forward movement is temporarily disabled. Four AA batteries power the MBED module and all peripherals (DC motors, H-Bridge, servos, distance sensor, and the Bluetooth module).

Hookup Guide

Components and pin hookups needed. Motor A is on the right side of the robot and Motor B is on the left (from robot's perspective).

Components

• (1) MBED
• (1) Adafruit Bluefruit Bluetooth Module
• (1) H-Bridge
• (2) DC Motors
• (2) Servos
• (1) Sharp IR Distance Sensor

Pin Hookups

Bluetooth Hookup

H-Bridge Hookup

Left/Right Servo Hookup

Up/Down Servo Hookup

Sharp IR Distance Sensor Hookup

Program Code

Download this code to your MBED and give it a try!

Demo YouTube Video