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.