Lithium battery recommendations?

wjcroftwjcroft Mount Shasta, CA
edited September 2014 in Hardware
I have not seen much mention of how to power the board. It would seem a 9v or AA cell holder would be really heavy. Are you guys considering some type of flat lithium cell? How would the charging work with that, could the CPU carry out it's own power management and charging, perhaps detecting when an adapter is plugged in? Or perhaps some flat pack "ready to use" power packs have a jack and charging software built in. Thoughts?

William Croft

Comments

  • wjcroftwjcroft Mount Shasta, CA
    Just watched Lady Ada describe the PowerBoost 500C that she designed; can even be essentially a lithium flat cell UPS. Cool. http://www.adafruit.com/products/1944 . Released in June 2014 Schematic, https://learn.adafruit.com/adafruit-powerboost-500-plus-charger/
  • JasonJason
    Is everything on the board  5 volts? Going from 3.3 to 5 will be a change for me.
  • wjcroftwjcroft Mount Shasta, CA
    edited October 2014
    OpenBCI (8 bit version), like most 5V Arduino boards, has regulators for both 5v and 3.3v.

    OpenBCI (32 bit Chipkit) is 3.3v only.

    Both boards can be powered from a power booster, like the 500C;  which puts out 5.2v so as to ensure the 5v regulator is happy.
  • juldaujuldau France
    Hi,
    about wjcroft last comment on this thread: "OpenBCI (8 bit version), like most 5V Arduino boards, has regulators for both 5v and 3.3v."
    Does that mean I can use for my 8 bit version the same 3.7V battery pack as the one recommended for the 32 bit board: https://www.sparkfun.com/products/10718 ?
    Otherwhere in the forum, it is recommended to use a booster: can I avoid using one and plug directely the 3.7V pack into my 8 bi board ?
    If not, how do I get the right connector between the booster and the board (looks like it has micro USB output) ?
    Thanks


  • biomurphbiomurph Brooklyn, NY
    @juldau,

    You can't use a 3.7V battery for the 8bit board. The ATmega328P needs to run at 5V in order to clock it at 16MHz. 
    the back of the 8bit board has a note that says 6V - 12V, and that is the functional power input range of the board.
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