By Dhaval R. Mehta and Jill J. Parekh¶

Description¶

The Robot is used for security purpose.

Block Diagram¶

The block diagram above shows the replica of the hardware connected on the robot to the mbed chip.

• Magnetic card reader-It is used for security reason. Only two buzzcards have been given access to activate the robot.
  • When first buzzcard is swiped it activates the robot, the bot moves in clockwise direction and activates the pressure sensor.
  • Now when second sensor is swiped it activates the robot, the bot starts moving in anticlockwise direction and activates humidity sensor interfaced with mbed chip.

• RS 232- It is used to make mbed chip compatible with Magnetic card reader, as both work on different logic technologies.

• SHT15- It is interfaced with mbed chip, which provides two parameters i.e Pressure and Humidity.

• LCD- It is interfaced with mbed chip to display Pressure and Humidity parameters when activated.

• Dual H-Bridge- It is used to interfaced with mbed chip and Robot such that mbed can control the motions of the bot.

Hardware Used¶

• mbed LPC 1768
• 16*2 LCD
• SHT15
• RS 232
• Magnetic Card Reader
• Dual H-Bridge breakout borad
• DC Motor Robot

Connections¶

• mbed to lcd

• mbed to H-Bridge

• H-Bridge to Robot DC Motor

• mbed to SH15

• mbed to RS 232

Code¶

Images¶

Demo¶

Reference¶

• mbed.org
• www.sparkfun.com