Arduino Base Capacitive Proximity Sensor with Midiplayer

Capacitive sensing is a noncontact technology suitable for detecting metals, nonmetals, solids, and liquids, although it is best suited for nonmetallic targets because of its characteristics and cost relative to inductive proximity sensors. In this paper extension of capacitive proximity sensor is shown. The extension is an increase in sensitivity to detect the small changes in capacitance associated with objects at a certain distance from, instead of coming in contact with, the electrode. The sensitivity is a function of the electrode size, ground coupling, and the measurement mechanism. For the proximity capacitive sensing Arduino is a best tool for making such kind of project work that can sense and control more of the physical world than your computer. It's an open-source physical computing platform based on a simple microcontroller board, and a development environment for writing software for the board. Here in this project we have used Arduino board which contain Atmel MEGA32U4 microcontroller. The ATmega32U4 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega32U4 achieves throughputs approaching 1 MIPS per MHz allowing the system designed to optimize power consumption versus processing speed. In this paper, I am presenting one project which can sense live human or conductive material from distance by proximity capacitive touch sensor controllers MPR121 and plays .mp3 file using this audio codec Ic VS1053b through SD card & 3.5 mm jack Speaker