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...