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Shopping list for custom project
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Shopping list for custom project

by GLaszlo on Mon Mar 21, 2016 9:14 am

Hello,
I want to build a portable USB charger for my mobile devices (right now mainly a Blackberry Z10), with the following options:
- stock rechargeable batteries (thinking 4xAA, but open to suggestions)
- ability to recharge the batteries from any USB source (so µUSB input)
+ Optional charge level indicator / on/off switch
So basically an equivalent to the USB Battery Pack series, but with replaceable stock batteries.

Could you give me a shopping list of the kits/components I need?

GLaszlo
 
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Joined: Mon Mar 21, 2016 8:36 am

Re: Shopping list for custom project

by adafruit_support_bill on Mon Mar 21, 2016 9:50 am

All of the charger boards we carry are designed for LiPo cells. Most AA rechargeable cells are NiMH or NiCd. They require a different charge cycle.

adafruit_support_bill
 
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Re: Shopping list for custom project

by GLaszlo on Mon Mar 21, 2016 11:23 am

I have a PIXO C-USB universal charger (https://web.archive.org/web/20150219023 ... _cusb.html) that manages both nicely, but I was hoping to avoid tearing it apart for this project :)
Since the original manufacturers' site is offline, it might be interesting to pick up one and reverse-engineer it.

In any case, assuming I'll just use the PIXO board for charging and the PowerBoost 1k Basic for output, how would you wire it all together?

GLaszlo
 
Posts: 2
Joined: Mon Mar 21, 2016 8:36 am

Re: Shopping list for custom project

by adafruit_support_bill on Mon Mar 21, 2016 11:32 am

Not familiar with the charger you are using. If it supports simultaneous charging and powering the load, you would just need to connect your load outputs to the PowerBoost.

Otherwise, you would need something like a SPDT switch to toggle between charging and powering the load. Connect the common pin to the battery positive terminal, one of the others to the charger positive output and the other to the positive input of the PowerBoost. You can connect the grounds and negative terminals all together.

adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Please be positive and constructive with your questions and comments.