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  • Author Author: COMPACT
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It's Alive! Part 008 - QiKi (pronounced Cheeky!)

COMPACT

Four Modes of power operation with Qi!

I've been offline due to a my Cable Broadband provider having a rather lengthy system outage (2 days) and in that time I have noticed that Chad has beaten me to the mark publishing a Qi Powered Raspberry Pi.

I was waiting to publish my Qi powered Raspberry Pi Pictures after I incorporated automatic power switching between Wireless power and Battery Backup.

This allows the Raspberry Pi (or other attached device) to continue working away from the charging pad or to work with portable devices.

For the prototype I am going to use a Texas Instruments TPS2115APWTPS2115APW Power Switch. http://www.ti.com/product/tps2115a

But for the next iteration I am going to use a Texas Instruments bq25071 Li-Ion Battery Charger with Power Management http://www.ti.com/product/bq24071 because this does away for the need for the TPS2115APWTPS2115APW

 

My design will provide the following power modes:

  • Qi Wireless - Direct Device Operation and Battery Charging
  • Back up battery operation
  • External Adapter - Direct Device Operation and Battery Charging

 

This all with smart power selection in the following priority:

  • External Power Adapter
  • Qi Wireless Power
  • Battery

 

Here are three pictures showing a Raspberry Pi with wireless Bluetooth keyboard and mouse that's directly Qi wireless powered, operating from Qi Charged Battery and the Battery being charged with Qi wireless power.

I just can't wait to get the TPS2115APWTPS2115APW and bq24071 devices wired up so I can show you a single picture of my device that supports all of these modes.

 

If you want, you can make the Ethernet Interface wireless using the Texas Instruments SimpleLink Wi-Fi CC3000. http://www.ti.com/ww/en/simplelink/

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  • in reply to DAB

    Hi DAB,

     

    Thanks for the comments.

    I haven't tested the range limits of the CC3000CC3000 but suffice it to say it has worked great for all my tests thus far.

     

    As for the power versus distance that's an excellent idea for one to plan the capacity of the Li-Ion battery to be used.

     

    Cheers!

    Compact

  • Hi Monte,

     

    Yes, it would be an interesting project to set up the RPI with the CC3300 to see if you could set up a wireless Wifi link between an laptop and the RPI device.  I think I can see where you could build a wireless link booster for a portable hub using these components.

     

    Did you ever do any experiments to see how far you could separate the CC3300 rcvr and xmitr?

    It would be interesting to see the power use verses distance for a stable RF link.

     

    Just a thought,

    DAB