Week : 22 (fyp sem 2)

Title : Output of the system (circuit output)

Objective : To explain how the system works

Contents / procedure :

In this system there is a keypad to enter the password (input stage) and LCD to display the output (output stage).To activate the security system,firstly press button 'A' at keypad to set the password.Then press button 'B' to re-enter the password that have been set.When the security is activate, check the motion detector.Buzzer will on to indicate that the motion detector is function.Buzzer will off when it doesn't detect motion within the range.This motion detector and buzzer can replace the bell because if there is people outside the house the buzzer will sound.This system not only can be used when we are not at home, but also when we are at home. If there is stranger who tried to get into the house without using the password , the siren will sound when the magnetic lock is open.At the same time pepper gas spray will work.Siren will also sound if three times enter the wrong password.To reset the system when the alarm is activate, press button 'B' at keypad and enter the password that have been set for reset the system.This password is not the same password used to open the magnetic lock.So it is important to remember this password.

Result / analysis :

Figure : keypad

Keypad : to set the password.

1. LCD display the 'Home Security System'

Figure : LCD display

2. After that, press button 'A' at keypad, and LCD will display set password 1.After set the password, press button 'B' and again re-enter the password to activate the system ( LCD will display security ON).

3.When the security is activate, siren will on when there is motion detect by motion detector.Siren will only sound when there is motion within the range that the motion detector can detect.

motion detector

buzzer

4. If the magnetic lock is open without using password, buzzer will sound.The pepper gas spray also function at the same time.

magnetic lock

Automatic spray air freshner as pepper gas spray

5. To reset the system, press the button 'B' and enter the password that have been set to reset the system.

Conclusion : This home security system works well.

Week : 21 (fyp sem 2)

Title : Home Design Prototype

Objective : To design the house prototype

Content / procedure :

Perspex ( a transparent plastic ) are main devices used to design this home prototype.This home prototype is  to indicate where to install the security devices in the house.

Result / analysis : Below are the pictures during the process of making home prototype.

Week : 20 (fyp sem 2)

Title : Schematic Diagram

Objective : Schematic Diagram Design

Content / procedure :

 Schematic Diagram design show the electrical relationship of all components.This diagram shows the component of the circuit and show the connections between the devices and components.

Result / analysis : 

 

Figure : Schematic diagram of home security

Week : 19 (fyp sem 2)

Title : PCB Layout

Objective : PCB layout design

Content / procedure : 

PCB is a printed circuit board.Have you ever looked inside your computer, a radio or a telephone? The printed circuit boards inside it are the flat, thin, square, usually green fiberglass slabs that have electrical components attached.   Harder to see are copper traces running underneath the green covering.   You would have to try different angles of light to see them.   These are wires that are "printed" on the fiberglass slab.   They connect the electrical components, thus forming circuits.   Thus the name "printed circuit board."From my previous post, I have mention about removing the timer circuit from automatic spray air freshner.As you can see figure 1(a) below,the timer circuit is one of the example to show how PCB layout look alike. And for figure 1(b),figure 1(c) and figure 1(d) is my security system pcb layout design.

Result / analysis :

Figure 1(a) : Timer circuit pcb layout design

Figure 1(b)

Figure 1(c)

Figure 1 (d)

Conclusion :

 DIY printed circuit board at :
 http://www.youtube.com/watch?v=wKEe3otWstM&feature=related

Week : 18 (fyp sem 2)

Title : Power source / Power supply

Objective : Using rechargeable battery as power source for the security system

Content / procedure :

Apart from using the rechargeable battery, we can also use ac-dc adaptor.Battery can be used as a replacement  if there is power failure. The battery must be charge before using it.

Result / analysis :

Figure 1 : rechargeable battery

Figure 2 : AC-DC adaptor

Week : 17 (fyp sem 2)

Title : Pepper Gas Spray using automatic spray air freshner

Objective : Using the mechanical part of the automatic spray air freshner only

Content / procedure :

I have remove the timer circuit for automatic water spray freshner in order to use only mechanical part of the automatic spray.After that I connect the positive part and the negative part of the automatic air freshner to the relay to test if it works or not.Alhamdulillah, it works.When the magnetic lock is open withot using the password the spray will function automatically.

Result / analysis :

Figure : Automatic spray air freshner have been connected to the relay

Week : 16 (fyp sem 2)

Title : Timer circuit in automatic spray air freshner

Objective : Remove the timer circuit from automatic spray air freshner

Content / procedure :

 Purpose of removing the timer circuit from the automatic  spray air freshner is so that  I can use the mechanical part of the spray only.After i remove the timer circuit, I would connect the negative and positive source from the spray with the common and normally open part from the relay.

Result / analysis :

Figure 1 : Automatic spray air freshner before removing the timer circuit

Figure 2 : Automatic spray air freshner after removing the timer circuit

Figure 3 (a) : Timer circuit that have been remove from automatic spray air freshner (with back view)

Figure 3 (b) : Timer circuit that have been remove from automatic spray air freshner ( with front view)

Conclusion : The timer circuit have been remove and after this i will try to connect the positive terminal and negative terminal of automatic spray air freshner with the relay.