CIRCUIT MAKING !!! ^^

This week, it’s time for us to move on to make our own circuit after we had done with multisim and ultiboard in the previous class.  Everything needs its body and also our circuit. Its main body is it board and to make board for our circuit there are few steps need to be taken. Mr. Redzuan guides us on how to make our board based on PCB layout that had been printed. 

example of apparatus needed

First, we need to remove the insulating layer that cover up solder mask that are in green color. Then we paste the printed layout onto the board and then light the board by using UV light to print the circuit onto the board. In order to develop our circuit, we need to put the board into the developer sensitizer solution and its removes the unnecessary sensitizer. Part with ultraviolet print dissolves in the developer and the copper appear. 

Next, process will be etching. Etching is the process where the unnecessary copper foil part is being dissolves by using etchant such as ferric chloride. The acid is very harmful that when it get touch to our skin immediately need to be wash with flowing water, besides when the solution get to your cloths its take time to be taken off just like what happen to me. After done making the board with circuit we need, it time to drill so that we can solder our component. Placement of component is based on the PCB printed on our board. 

example of etching process

We need to be careful because the placement of component involves both sides of board, therefore we cannot doing any silly mistake that can wipe out our circuit  function. After all these process, our BOARD and CIRCUIT is DONE.

p/s: im sory mr.redzuan for making two board going waste (learning from mistake)

circuit 2 (smd component)

circuit 1(through hole component)