Final Year Project 2(Hardware) Week9

Title: Tested the real PCB circuit

Objectives:

• Build the circuit for relay part and MAX232
• Test the both MicroController PCB and relay PCB 

Procedure:

• The relay and MAX 232 circuit needed to be etching first

Before Etching

Relay & MAX232 PCB

• The LCD cables need to be soldering before it fit into the MicroController PCB

Step 1

Step 2

Step 3

Step 4

Step 5

• Step 1 until step 4 are shown that the step needs to be taken to create LCD connection to build to the MicroController PCB. While Step 5 are shown all the limit switches and variable resistor are done soldering.  

Result and Analysis

• After all the component are done soldering, its time to put all the component into its position and test it. 

LCD corrupted

VDD and VSS jumper

• The circuit for MicroController are fully done, after put the supply the LCD didn't show any result. This is because of the LCD failure to operate well. LCD needs to replace with another LCD. And then, the MicroController circuit needs to added some jumper to make sure the current are fully supported

• The LCD are shown the feedback and all the main circuit for MicroController are function well. Then, connected with GSM Wavecom and connected with the relay circuit at (breadboard).

Conclusion:

• All the PCB are designed and tested, the MicroController circuit are function well but the relay & MAX232 circuit are difficult to tested because the voltage drop at relay coil are about 2.7V that cannot trigger the 5VDC relay
• While, the GSM Wavecom are function well with the MicroController circuit and can sent and receive the message tthrough the mobile phone.