Week 14

SUBMIT THE PROPOSAL REPORT

The blog and proposal must be submit  After 14 weeks research and study the operation and components about my project. The proposal is written to propose our ideas to the supervisor and FYP committee and to ensure all activity have been recorded, so can refer if a problem will be appears.The purpose of the blog is to records activities that have been done from week 1 until week 14.From blog and proposal can document the work that have been planned and work that have done.



Work Plan

Work plan is commonly used in project management, is one of the most popular and useful ways of showing activities (tasks or events) displayed against time. On the left of the chart is a list of the activities and along the top is a suitable time scale. Each activity is represented from semester 1 and semester 2 by a bar, the position and length of the bar reflects the start date, duration and end date of the activity.


Semester 6

Semester 7

Week 13

On week 13, I continued more my research about my component for this project. And also I calculate my budget for this project.

Buzzer

Piezo Tranducer - 15v (2800Hz)

This one comes with two wires attached and two screw mounting points, so it can easily be integrated onto a breadboard or into a circuit! To use it need a voltage source such as a battery; simply connect the black wire to the negative of the voltage source and the red wire to the positive point that voltage source. This buzzer requires no external oscillation, simply place a voltage across the terminals and it will make noise.

Features:

• 15V Piezo Transducer
• PCB & Breadboard Mountable

Specification:

• Rated Voltage 15V DC
• Operating Voltage 9V - 15V DC
• Max Rated Current 40mA
• Sound Output 2800Hz at 30cm, at Rated Voltage ≥90dB
• Resonant Frequency 2800 ±200Hz
• Operating Temperature -20 to +60°C
• Storage Temperature -30 to +80°C
• Overall Diameter: 42mm
• Fixing Centre Diameter: 34mm M3.5
• Centre Diameter: 28mm
• Height: 14.5mm
• Wire Length: 28AWG 100mm
• Housing: PC ABS Black
• Weight: 17g
• Model No.: 41.S01L120A-LF

 

LCD (Liquid Crystal Display)

LCD 20x4

This 20x4 LCD is electrically and mechanically interchangeable with 20x4 LCDs from several

other vendors. The only differences we've seen among different 20x4 LCDs are:

1.  LED backlight brightness, voltage and current vary widely, as does the quality of the display
2. There is a resistor “Rf” which sets the speed of the LCD interface by controlling the internal oscillator frequency. Several displays we have evaluated have a low resistor value. This makes the display too slow.

At 5V the resistor Rf should be 91 Kohms. At 3V it should be 75 Kohms. Using a 3V display at

5V is acceptable from a voltage standpoint (the display can operate on 3-5V) but the oscillator

will then be running too slowly. One fix is to always check the busy flag and not use a fixed time

delay in your code, then it will work regardless of the LCD speed. The other option is to always allow enough delay for the slower display.



Budget