week 8

Week 8

Title of Activity
-Research about Methodology.

Objective
- To know what method being used in this project and the function of each component.

Content/Procedure

-flowchart methodology
-Block Diagram.
-Explanation on each of the block diagram.
-Function on each block diagram.

Result/Analysis

Continue flowchart 2

Basic Model of the System

The block diagram depicts the total blue print of the proposed project. The total essence and the functioning of the project are represented in a single block diagram. The block diagram mainly consists of 4 parts

• LM358 Comparator
• Eye Blink Sensor
• LCD
• 16F877A Microcontroller
• Buzzer

                                                    block diagram for eye blink detector

IR Sensor

·         The transmitted signal is given to IR transmitter whenever the signal is high, the IR transmitter LED is conducting it passes the IR rays to the receiver.

·         The IR receiver is connected with comparator.

LM358 Comparator

·         The LM358 consist of two independent, high gains, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltage.

16F877A Microcontroller

• Wide operating voltage rage (2.OV-S.SV).
• Programmable code protection.
• Power saving sleep mode.
• Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation.
• Self-reprogrammable under software control.

Buzzer

·         A buzzer or beeper is a  signaling device, usually electronic, typically used in automobiles, household appliances such as a microwave oven, or game shows

·         It most commonly consists of a number of switches or sensors connected to a control unit that determines if and which button was pushed or a preset time has lapsed, and usually illuminates a light on the appropriate button or control panel, and sounds a warning in the form of a continuous or intermittent buzzing or beeping sound.

Liquid Crystal Display (LCD)

·         The LCD display consists of two lines, 20 characters per line that is interfaced with the PIC16F73.

·         The display contains two internal byte-wide registers, one for commands (RS=0) and the second for characters to be displayed (RS=1).

Conclusions

From the conclusions in week8

A methodology is instantiated and materialized by a set of methods, techniques and tools. A tool is any instrument or apparatus that is necessary to the performance of some task. A methodology does not describe specific methods; nevertheless it does specify several processes that need to be followed.