14th Week

As some of you know,
this is the last week for us to do a preparation
because we will face the
day that we have wait for so long on tomorrow. 

May Allah bless us

 on the

 PRESENTATION DAY!!

BTW, Thanks for watching my blog and I hope 

you will get the benefits. 

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13th Week

This week, we just only touch up the project to make it looking better.
We make more preparation on build the poster and much to study our product.

# In other words,  

"WE ARE READY TO PROPOSE OUR PROJECT TO THE

ASSESSOR THAT WILL TEST US ON

THE PRESENTATION DAY SOON!" =)

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12th Week

Hardware is done and now we will put the circuit inside the hardware and test it.

# We need to make a retested the circuit because sometimes it does have some problem during the time we put it in the hardware.

# Here it goes :

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11th Week

The circuit already done, this week we will make the hardware to put the circuit and design it on our own way.

# By referring the prototype, we design the hardware nicely.

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10th Week

Nothing more, this week i will test the circuit and do some trouble shooting if there are having any problem on the board.

• # I have sacrificing our Apple's USB cable to see inside it

• # Then I cut the USB and solder it directly with the board.

• 

• # By using a 1000w bulbs that I assume to be a solar, I put it close to the solar cells to get the compatible voltage that the circuit needs.
   
  # To see the result, I used iPhone 4 as a device on our experiments.

•   # Unfortunately, the circuit did not work. The device can detect but it isn't charge.

 

•  # Now, I making a bit troubleshooting the circuit to solve the problem.

Voltage that comes from the solar cells

To protect the IC's, we put the bulbs a bit range from
solar cells to get a compatible voltage.

Now, we measure the voltage at current line.
( D+ )

Then we checked on the negative current line ( D- )

On the ( D- ) The voltage is fluctuate and not static.

# Its taking about an hour I am wasting my time to troubleshoot this circuit.

# Until I'm having a deadlocked on how to troubleshoot this problem, So I decide to research the circuit again on the internet.

# Finally, after research by research and I know what is the problem and  how to solve it.

# The problem of my circuit is I used a wrong value of resistor that the circuits needs. So, I bought the variable resistor and this is the result. =)

This is the ratio of the resistor needed. its canot be less or more then.

This is the value resistor of all type of devices.
You can see yours! =)

GAMBAR lagi...

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9th Week

This week I gonna drill the PCB board to put the component through the hole.

Drilling the board.

Every holes and do not miss even one.

Check every holes to make sure you can see trough it

Drilling!

# After done drilling the holes, I cut the board with my measurement.

Cut the board by using drill is much easy.

Do not let the drill touch the cooper layer!

Make sure its straight to make its look nice.

After cutting.

Now finish!

My palm size is much much bigger.

# Now i need to solder all the components, I need a 100% concentrate during this session because my PCB board is quite complex. So, all the components is close to each other.

see how complex the circuit. Its very small.

its not that simple as you see unless you already professional.

Slowly and be patiently

Watch all the components carefully

Almost done!

Finish Soldering! =)

The fact is, my hand do shacked from feared the soldering iron will gonna burn the component whenever i put it at one component for too long.

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8th Week

Week 8 already,

So, this week i am planning to do an etching for my PCB design that i have done in previous week.

Step 1

• -  Firstly, what i need to do is print the circuit in a "Photo Paper" by using a "LaserJet" printer.

# For your information, all the highlight stuff is important to make your PCB design successful print in a board. If not there might be a trouble in the next step.

1st Circuit : Charging Controller for Devices

2nd Circuit : Charging Controller for Li ion Battery

Step 2

-  Secondly, i take(cut) one of it to do the fabrication session.# Then, by using that photo paper i used to iron it on the PCB board to let the ink of the "laserjet" printer stick on the board.

Iron session

Use the normal temperature

Until its looking like burning

Burning like this is enough

Finish iron session

CAUTION!!

# Do not iron the board for too long because this will happen to your board. (see the picture below)

This happen on my friend board.

Due to thermal shock, his pc board bent inwards.

Step 3

• - Thirdly, let the board cool down a minute to continue the next step.

# When the board is cold until you can touch it using your finger, then its already prepared to open the photo paper.
# The photo paper will sticky with your PCB board, so you need slowly take it off.

  

                   

Step 4

 -  Final step is the etching session.

# This session we need to use acid "fabric chloride" to remove all the unused cooper layer.

# Then, the only left is the cover that been cover with ink "laserjet" printer

                           * put the circuit and sieving the acid until the copper loses from board

Take a look at the board to see the progression

If its not done yet then repeat the sieving process 

After finish  you can see the different colour left

Now, Finish you have done your etching session

 # To remove the laser jet ink, you can use the gasoline by rub it on the surface board. =)

• See my PCB's, 2 circuit that already done etching session.

Sorry i did not take a picture for the circuit on the right side. But, that circuit already finish doing an etching session. Thank you!

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