Using the HC-05 Bluetooth RS232 Serial module for cheap wireless communication between your PC and Arduino

I recently purchased the HC-05 RS232 serial bluetooth module from eBay. These modules sells from $10 to $20 including shipping. My plan was to use it as a economic wireless communication tool between PC and the Arduino board. The module has built-in Serial<–>Bluetooth protocol converter. Therefore it can be connected…

Carrier board and Eagle library for Sharp GP2Y0D805 or GP2Y0D810 digital proximity sensors

I recently purchased the GP2Y0D810 digital proximity sensor from Pololu robotics to use with a obstacle avoiding robotic system. These digital sensors is designed to detec objects within 10cm. It does not tell how far the object is but senses if there is something within 10cm range. More information about the sensors can be found on…