FYP Sem II : Week 8

Title of Activity:

Drilling and placing the components to PCB Board to solder them

Analysis:

• After the process of PCB fabrication is done, the components  are needed to be placed one by one. The correct size of component's hole is needed to be drilled according the the leg size.

 Drilling the big size of hole for PCB stand.

 Drilling the component's size of hole.

 Complete PCB drilling.

• Once the component is matched with the hole that has been drilled, prepare the soldering gun and tin.

•  Try to fit the leg size of components and soldered it properly. 

 

Trying some of the components at the PCB board to whether it fits or not.

Soldering the components leg

• To make the board look neat, the extra leg from the component is cut. 

     

• The same process is keep on continuing until the last component is being placed.

• The final PCB board is now completed and it will be looked like the pictures below:

Conclusion:
The PCB board is now ready to be tested. After all the component had done soldering, I need to make sure that all connection from PCB board especially to RFID reader, and RS232 to serial port has the correct one.

FYP Sem II : Week 7

Title of Activity:

Making the PCB Fabrication

Analysis:

1) PCB Drawing: 

     Designed using Protel DXP 2005. Once the PCB layout has been correctly design, it is now prints out the layout on the A4 size transparent OHP paper. Only laser printer and the carbon type of printer such as Photostat machine are allowed to print the PCB layout. 

2) PCB Cutting: 

      Cut photo PCB size according to the film size and OHP paper according to PCB size. 

3) PCB Photo Etching: 

Exposing the photo PCB in photo etching kit or can be using iron to transfer the ink into PCB board in about 8 to10 minutes.

4) PCB Redrawing: 

Redraw the remaining circuit design by using PCB marker or any marker.

5) Acid Etching: 

The purpose of etching is to remove unwanted copper from the PCB surface to achieve circuit design requirements. The etching process takes around 30 minutes to finish.

6)Thinner Washing:

This is a process to remove the remaining copper on the PCB board in order to solder the components. This also can be done by putting some aerosol to remove the remaining copper.

Conclusion:

I learned how to do the PCB fabrication. It is the basic step to make a circuit on a PCB board. The same process will be done if any damage occurred on the previous circuit.

FYP Sem II : Week 6

Title of Activity:

Designing circuit to be placed on PCB Board

Analysis:

Here are the PCB drawing that has been designed:

This is the circuit that will be printed on the PCB board. It shows how the connection from one component to another component.

This is the look of the circuit when the component will be placed on the board.

Conclusion:

These drawing will be placed on the PCB board.