WEEK 8

BLOCK DIAGRAM

The sensor use is accelerometer which pick up signal from movement of a person. The signal is filter before microcontroller process it. The signal must be filter because the noise of the movement of a person. The microcontroller process the signal and transmitted data using Zigbee wireless to Pc for storage and display. Microcontroller use is ATMega 328 with arduino platform. Using Visual basic to display the data on PC or laptop. The display output on PC is:

1.      Total steps

2.      Speed of a user

3.      Calories burned

4.      Distance travelled

   SENSOR

The input sensor that we will be using is an accelerometer. The accelerometer provides x, y, z direction voltage values based on the forces exerted on the accelerometer. The voltages acquired from the input sensor then will be passed to the filter. 

   FILTER

            A filter may be required to clean up the signal from the input sensor. The output from sensor may have noise. Because of the noise that may be associated with running, a small hardware filter may be needed. According to the information provided by the accelerometer data sheet, a simple low-pass filter will be required.

   DISPLAY

The output device will display the computed data (distance, speed and others). The output device can be come in many different forms. It can be display at LCD or can send the output elsewhere via a communication port. If an LCD screen is used, it must be small enough to fit hand. An alternative way to display the data is to send smartphone or tablet. This will allow the user easy access to information desired. For this project, it will be sufficient to use a small LCD screen.

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