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Mini portable 5Volt with USB-A port is ideal for Arduino and more electronic projects that need 5 Volts for working.  This project is mounted on a round PCB of 16mm diameter with an input of 9Volt and an output of 5V through an USB-A port.

Step 1: List of Materials

The parts are the following:
1 Round PCB of 16mm Diameter (Part No. 276-004, Radio Shack)
1 Electrolytic Capacitor of 100mF, 25V
1 Electrolytic Capacitor of 22mF, 25v
1 Voltage Regulator of +5V
1 Battery clip for 9V
1 9V Battery

Step 2: Do Your USB for Power Supply

Step 3: Mount the Components

Step 4: Identify the Input & the Output of Your Project

Step 5: Connect Round PCB With the Input & the Output Showed in Step 4

Step 6: Mini Portable 5Volt in Action

<p>This project can also be seen in Amazon webpage at:</p><p>https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&amp;field-keywords=Mini+Portable+5V+with+USB-A+port%2C+jameco+electronics</p>
<p>This project can also be seen in Jameco Electronics at:</p><p>http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&amp;storeId=10001&amp;productId=2215961&amp;catalogId=10001&amp;CID=CLO</p>
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<p>Portable power supply is always a good idea.</p>
<p>I enjoyed developing this project.</p>
<p>Thank you for viewing this project.</p>
<p>This project is for you.</p>
Nice contribution. I think I'm going to make one and use it as an emergency USB power supply to charge my phone when away from a power source.
Thanks, I'm happy because this project can be very useful.
This will not work on all phones. Many phone, namely smart phones, require a bit of power to come across the data wires before they will enable charging. Great project for simple things like arduinos but not so much for smart phones.
<p>Thank you!</p>
I didn't know about the need for power on the data lines. I just tested my HTC G2 with a USB cable having only the the power lines connected. It charged okay..
Effectively, Philip, you're right. Thank you for your feedback
Another approach is to use a cheap USB car adapter. While they're designed to operate on 12 volts they'll work fine when attached to a 9 volt battery. <br>
In the step 1, I have included where you can buy the round PCB and the part number. The completed information is: Round PCB Kit (Part No. 276-004, Radio Shack)

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