DIY PORTABLE POWER BANK

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About: I am an electrical student living at chennai i love electronics very much.

Make simple portable power bank using 9-volt battery and basic electronics components. use it to charge your mobile phone at any emergency situation. simple and compact you can also add this to your survival kit bag.

Step 1: VIDEO

Here the video link

PLAY VIDEO

Step 2: COMPONENTS NEEDED

Get this components from local electronis shop.

* PUSH BUTTON -1

* LED(RED) - 1

* 100 ohm RESISTOR - 1

* BATTERY CLIP - 1

* 9-VOLT BATTERY - 1

* GENERAL PCB - 1

* 7805 - 1

* USB FEMALE - 1

* HEAT SINK TUBE - 1

Step 3: CIRCUIT DIAGRAM

Circuit diagram for this project.

The battery provides 9-volt. But the charging voltage for mobile phone is 5-volt. Voltage regulator 7805 is used. it gives 5-volt output when it get input above 6-volt.

Step 4: HET SINK TUBE

Use heat sink tube to close bare opening of the circuit. Also to prevent from short-circuit occurence and compact in hand.

Step 5: CHECKING BATTERY

The 9-volt battery is not a rechargeable battery. It is to be ensured that the battery can able to give required voltage to charge phone. The LED in the circuit used to check the battery condition. if the battery level decreased the LED doesn't glow this will help us to find the correct battery.

Step 6: CHARGING MOBILE

The 9-volt battery have a lot of limitation. it doesn't give full charge. because the battery rating is not up to the level.But used to charge mobile to some level which is sufficient for emergency situation.

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    4 Discussions

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    3366carlos

    1 year ago

    I don't think it matters in this case. the resistor is the limiting factor. 9-0.7/100 is the maximum current.

    1 reply
    0
    None
    bbsbb3366carlos

    Reply 1 year ago

    I consider the resistor is part of the led.

    0
    None
    bbsbb

    1 year ago

    The design is wrong. The led should be parallel with 5v, not in series

    1 reply
    0
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    hemarajbbsbb

    Reply 1 year ago

    sorry for wrong circuit. know it is changed