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Related

Battery Powered Raspberry PI Zero W

iec
iec over 5 years ago

I am planning on building a mobile raspberry pi project, I have read many of the battery powered threads but do not have an EE background so I want to make sure that what I am planning on buying will work.

 

These items are all from adafruit

 

  • Lithium Ion Polymer Battery - 3.7v 2500mAh - pid 328 - chosen for slimline i.e. height
  • USB LiIon/LiPoly charger - v1.2 - pid 259
  • Raspberry PI Zero W - pid 3400

 

Is the lipoly charger the right board to power the pi and perhaps a small fan such as the Miniature 5V Cooling Fan for Raspberry Pi pid 3368

How long will the pi run with this battery?

Should I choose a different battery - smaller - larger?

What other questions should I consider for this project?

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  • shabaz
    0 shabaz over 5 years ago

    Hi Eric,

     

    I'm unfamiliar with the Pi Zero W, but as I understand, it needs 5V for operation. If that's the case, then you'll need a board that can convert the battery voltage to 5V. If you search for 'Pi Zero W LiPo' you'll find some solutions.

    Aside from that, the items you've listed above would be required. A cooling fan is unnecessary (Pi Zero W won't get remotely hot for this to be needed) and will consume a lot of power and could cause complications.

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  • shabaz
    0 shabaz over 5 years ago

    Hi Eric,

     

    I'm unfamiliar with the Pi Zero W, but as I understand, it needs 5V for operation. If that's the case, then you'll need a board that can convert the battery voltage to 5V. If you search for 'Pi Zero W LiPo' you'll find some solutions.

    Aside from that, the items you've listed above would be required. A cooling fan is unnecessary (Pi Zero W won't get remotely hot for this to be needed) and will consume a lot of power and could cause complications.

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  • iec
    0 iec over 5 years ago in reply to shabaz

    thanks for the reply

     

    I'm unfamiliar with the Pi Zero W, but as I understand, it needs 5V for operation. If that's the case, then you'll need a board that can convert the battery voltage to 5V. If you search for 'Pi Zero W LiPo' you'll find some solutions.

    Aside from that, the items you've listed above would be required. A cooling fan is unnecessary (Pi Zero W won't get remotely hot for this to be needed) and will consume a lot of power and could cause complications.

    the USB LIION/LIPOLY CHARGER that I chose looks to me like it can handle 5v and that it can power the pi and charge at the same time am I not correct about this?

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  • shabaz
    0 shabaz over 5 years ago in reply to iec

    Hi,

     

    No, that charger supports 5V input for charging the battery, but the load output is the same voltage as the battery, there is no boost type circuit there. According to the schematic, the load is connected to the battery connections:

    https://learn.adafruit.com/li-ion-and-lipoly-batteries/downloads

    A DC-DC converter circuit is needed to increase the voltage to 5V.

     

    Alternatively, a very low cost option could be to use a USB 'power bank' type device (like those used to charge mobile phones) since they accept 5V for charging, and they also output 5V. Many (not all) will stop outputting 5V during charge.

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  • iec
    0 iec over 5 years ago in reply to shabaz

    so something like this?

    https://www.adafruit.com/product/2465

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  • shabaz
    0 shabaz over 5 years ago in reply to iec

    Hi Eric,

     

    Yes, that will do it, but $20 is a bit of a rip-off for such a hobby type item, considering it is just USB power bank functionality minus the cell. There is this for less than half the price:

    https://www.dfrobot.com/product-1613.html?gclid=EAIaIQobChMIqt3z5cHP5gIVVeDtCh2R0g2nEAkYEiABEgIaKfD_BwE

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  • iec
    0 iec over 5 years ago in reply to shabaz

    good deal!, nice, thank you

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