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Portable USB Charger Components And Tools

January 27, 2017 By Øyvind Nydal Dahl 12 Comments

These are the components you need for building the portable USB charger circuit.

These are all pretty standard components, so you can probably get these at your local electronics supplier if you have one.

If not, you can buy them at one of these online electronics shops.

Parts List

Quantity Component Value
1 Voltage Regulator LM7805
2 Resistor 75 kΩ
2 Resistor 51 kΩ
1 Resistor 330 Ω
1 Light-Emitting Diode Standard Output
1 Rectifier Diode 1N4001-4007
1 USB Socket Type A
1 Battery Connector 6 x AA battery
1 Prototyping board Stripboard

Tools

This project requires soldering. You don’t need a lot of tools to solder, but you’ll need a soldering iron. I you don’t have one, read my article on how to choose a soldering iron.

That’s the bare minimum. But there are a few other soldering tools that can make your life easier. Learn about the soldering tools I use here.

Optional Components

The following components aren’t required, but can be useful to improve your charger:

  • Heatsink
  • DC power socket
  • DC power plug
  • Solar panel charger (not tested)

If you have problems finding any of the components for this project, let me know in the comment field below.

Filed Under: Article

Reader Interactions

Comments

  1. Heli Jane says

    February 3, 2017 at 12:21 pm

    This article is showing that how difficult to make the portable USB charger, because openly it shows so many connection wires, connected here and there, only known person who have interest in it can understand this, thats why people like to covered things, because they dont want so much complications.

    Reply
  2. buddhabhushan says

    February 4, 2017 at 10:11 am

    very nice….. let you please, make me aware about future projects on electronics…….
    thank you…

    Reply
  3. Axel Sanner says

    February 20, 2017 at 4:03 pm

    Why use those inefficient linear regulators?
    I would probably look into a buck converter instead. for instance

    https://www.adafruit.com/product/1065

    Reply
    • admin says

      February 21, 2017 at 12:14 am

      Halla Alex!
      Absolutely a much better component. Great input.

      Best,
      Oyvind

      Reply
      • Axel Sanner says

        February 27, 2017 at 9:33 pm

        Yo Øyvind

        Forgot to say cool article, looking forward to more :)

        Reply
  4. Kenneth says

    April 20, 2017 at 9:01 am

    in the experiment what comes after the 330resistor

    Reply
  5. Laaland Clare says

    April 30, 2017 at 7:51 am

    Hello Oyvind,

    I accidentaly made your charger with a 9V battery, 81(33+33+15)ohm in place of 75ohm and 48(15+33)in place of 51ohm resistors. It is charging the phone. Is it ok to use this ratio in the voltage divider with a standard 9V cell.

    I will now make it with 75k and 51k. If it say 72k and 48k will it still work corrcetly . Will the low ohmage i accidentely used damage the phone by allowing too much current.

    I want to make this with my year 9 students so dont want to destroy their phones or will phone just draw the current it requires.

    How do i apply OHMS law to work out the voltage division equation for 9v battery.

    Reply
  6. nirban shangkor says

    May 21, 2017 at 4:02 pm

    give circuit image please

    Reply
  7. Mohit says

    May 26, 2017 at 1:13 pm

    Hello Sir ,

    Pl suggest how we know the value of resistance & diode and its rating also .

    Thanks & Regards
    Mohit Gupta

    Reply
  8. Daniel Meme says

    September 15, 2017 at 10:27 am

    I’m in kenya, , how can I get supplied with these components

    Reply
  9. abdulmalek says

    November 16, 2017 at 8:47 pm

    can any body tell me how exactly did admin calculated the resistance needed to determine the current for the phone?
    thanks for this good article

    Reply
  10. sunnytech says

    January 26, 2018 at 6:55 am

    I did the project but is discharging the phone’s battery.
    Can you pls help me out?

    Reply

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