Pocket-sized USB charger adapter

Posted by Paul on 22 May 2013

This Instructable shows how to make a professional-looking power adapter for charging USB devices using a Pololu Adjustable Step-Up/Step-Down Voltage Regulator S7V8A.

Featured link: http://www.instructables.com/id/Pocket-Sized-POLOLU-5V-Output-as-POWERTUBEs-acces/

4 comments

Hello,
first off i would like to say i'm a big fan of your products.
It's nice to know that my little instructable is included among others in your blog. Thank you!
Thanks for the nice feedback, and please let us know when you post more projects!
I'm trying to assemble a similar circuit, but taking the power from a DC motor used as a generator.
In this case the current is uneven and produces high voltage "spikes" which tend to burn the circuit downstream.
Any advice how to get rid of this problem? Could a big electrolytic condenser protect efficiently the electronics?
Hi, Manlio.

Adding capacitors might help. You might find this application note about dealing with motor noise helpful.

-Claire

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