Week 4: PCB Layout Design and Micro-controller Development Circuit

Week No: 4
Date: 16/2/2012


Title of Activity: PCB layout design and micro-controller development circuit


Objective: 


1) To estimate the main circuit board look like.
2) To make the design as small as possible.
3) To integrate all the component in the board.


Content / Procedure:


1) List down all the control component. 
2) Draw the circuit in PCB lab and print out the circuit.
3) Hatching the circuit regarding on that had setting in the PCB lab layout.
4) Solder the component on the circuit board.
5) Test the circuit.


Result and Analysis:


1) The main circuit board consist of :
     -  programmable integrated circuit (PIC)
     - MAX 232 integrated circuit (2x)
     - ULN 2003 integrated circuit
     - RS 232 port (2x)
     All of these element will be attached to the board


2) MAX 232 is the voltage level converter. It converts voltage level from CMOS (microsontroller output is CMOS) to TTL (PC output is TTL) and vice versa. But it drives voltage level from one to another voltage that is why it is also called voltage driver IC.


3) RS 232 was adopted as a standard for serial binary data signals connecting between a DTE (Data  Terminal Equipment) and DCE (Data Circuit-terminating Equipment). It is commonly used in computer serial ports. 


4) ULN 2003 is to drive the inductor type of load.


Conclusion:


1) The main circuit board need to be design more specific and functional, so that it can run smoothly.
2) MAX232 and RS232 need to be functional because it will communicate with the computer.
3) ULN2003 need to work properly because it will has to increase the voltage.

                                                       Figure 1: schematic design

 

Figure 2: PCB layout

                                                       Figure 3: Component placement 

Figure 4: Complete circuit