Friday, November 5, 2010

Mobile Phone Charger Circuit For Traveling

Here is an ideal Mobile charger using 1.5 volt pen cells to charge mobile phone while traveling. It can replenish cell phone battery three or four times in places where AC power is not available. Most of the Mobile phone batteries are rated at 3.6 V/500 mA. A single pen torch cell can provide 1.5 volts and 1.5 Amps current. So if four pen cells are connected serially, it will form a battery pack with 6 volt and 1.5 Amps current. When power is applied to the circuit through S1, transistor Q1 conducts and Green LED lights.

When Q1 conducts Q2 also conducts since its base becomes negative. Charging current flows from the collector of Q1. To reduce the charging voltage to 4.7 volts, Zener diode D2 is used. The output gives 20 mA current for slow charging. If more current is required for fast charging, reduce the value of R4 to 47 ohms so that 80 mA current will be available. Output points are used to connect the charger with the mobile phone. Use suitable pins for this and connect with correct polarity. The circuit comes from here.

The Schematic Mobile Phone Charger Circuit For Traveling

Parts:

R1 = 1K
R2 = 470R
R3 = 4.7K
R4 = 270R
R5 = 27R
C1 = 100uF-25V
D1 = Green LED
D2 = 4.7V/1W Zener
B1 = 1.5Vx4 Cells
S1 = On/Off Switch
Q1 = BC548
Q2 = SK100

7 comments:

  1. nokia it is beautiful mobile and i like me 6620

    ReplyDelete
  2. 18 this is good picture
    19 This is very smart tutorial...thank you for sharing...

    this is good site
    this is very intresting mobile phone.
    this is very good nokia mobile phone

    ReplyDelete
  3. this is good site
    this is very intresting mobile phone.
    this is very good nokia mobile phone

    ReplyDelete
  4. his is just great! Well done again Google. However, as others have mentioned nested folder support would be handy as would multiple account sign-in. Good job on the video as well, you guys must have taken some inspiration from the fruit's advertising - have to say, it works :)

    ReplyDelete
  5. how this work is it?
    good?

    ReplyDelete
  6. i like this nokia mobile and very good 1550

    ReplyDelete