Wednesday 12 September 2012

Semester 2 Week 3




TITLE:
Start buying the component and transformer.

OBJECTIVE:
To get the components for the inverter circuits.
To assemble components.


DISCUSSION/ANALYSIS:

This week i went to Jalan Pasar to get this components:

1. 14 resistor which each have their own value
2. 4 diodes
3. 2 diode zener
4. 8 transistor (mosfet)
5. Ic LM555N (timer)
6. 2 E-capacitor
7. 2 Ceramic capacitor
8. Relay of 12V (5 pin)
9. Transformer 5A 12V-240V
10. Fuse
11. PCB board


Above are the components which are needed to build an inverter circuit its not cheap and very sensitive and its expensive. For the transformer there is ready made sell at Jalan Pasar.

Below are the components that had been bought at Jalan Pasar to make an  inverter circuit.

The Inverter components.


Before assembling the components, the PCB board need to sketch first. Sketch the connection of the components using the special marker to do the sketch. Here is the picture of the PCB which had been done.

Sketching the PCB 


After finish the sketching, i use the acid water to remove unwanted copper in the PCB. In order to get the sketching printed in the PCB i have to dip in the acid water and spin the acid for about 45 minutes to get the copper remove and the printed copper remain.Below are the  results of the the PCB that have been hatching.



Although there are some connection are loss due the hatching i can fix it with multimeter to check the connection continuity, solder and sand paper. to repair the losses of the connection due the hatching, First need to test the continuity with refering to the circuit diagram. Find the the losses along the connection then solder it to joint each other. Use sand paper make it thinner and softer. Refering to the picture above, the silver colour is the joint made from solder.



CONCLUSION:

The component have been bought and hatching the PCB also had been successfully been made. The connection of the PCB has been tested and the hole on the PCB for the components leg have been done. Now i can proceed to next stage.





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