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Blog Ultrasmall Qi LED HACK
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  • Author Author: vsluiter
  • Date Created: 12 Dec 2012 10:29 PM Date Created
  • Views 1246 views
  • Likes 4 likes
  • Comments 3 comments
  • wireless_power
  • led
  • qi_standard
  • qi
  • wp_challenge_one
  • solution
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Ultrasmall Qi LED HACK

vsluiter
vsluiter
12 Dec 2012

As you saw in the previous post I still have some boards left; I decided to do a real 'hack' to show how small you can make a Qi receiver. I soldered a Qi receiver circuit, and dremeled off the rest of the board. REAL PCB Hacking!

 

This setup worked, and I thought I'd make a QiLED (it's blue, so you could pronounce it as 'chilled' image )light. Another possibility to "integrate Qi in daily life".

 

image

The IKEA card (default credit card size) was added as a size reference; and look at how small the Qi receiver in itself can be! The width of the board is now 23mm, and it could even be trimmed a bit down if needed!

 

 

Qihuahua powered wall lighting

To show the power of light that's available with this small receiver I took two pictures, one of the small 15W lamp that I normally use in our living room, and one where that light is combined with the QiLED, which is using about 1 Watt: 1/5th of the available Qi power!!

 

QiLED Qihuahua lighting vs. 'normal' light

image

Left: with QiLED powered by Qihuahua! Great!

Right: without QiLED: boring, dull, nah....

 

Amazing how much light power comes from 1 LED.... And powering this thing was VERY easy!

Of course the QiLED is powered by the Qihuahua in my home, but it can be supplied by any Qi compliant transmitter.

image

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  • DAB
    DAB over 12 years ago

    A very impressive "mood" lighting option.

     

    In my younger days, I used to work with lasers and I was always amazed at how a mere 5W laser could light up a whole room.  I could work around the lab and make minor adjustments using only the laser to guide my vision.

     

    Just a thought about how little light we really need.

     

    DAB

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  • vsluiter
    vsluiter over 12 years ago in reply to johnsocm

    Hey Chad,

    Yeah, I like small circuits image I remember seeing a very compact 4-layer layout somewhere in a Qi brochure/app note, but can't find it now.  I found it amazing that this cost me about as much space as a diode bridge, 2 caps and a 7805; the 'standard' solution for a  5V supply!

    Regarding 'making' a small version: to fit the receiver in the LEGO battery box I had already made a very small design, for this 'hack' I just had to chopp off halve the board (a bit exciting, I did it after soldering the components. Should have done it the other way around!)...  Anyway, to me this opens up lots of possibilities for power in small housings.

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  • johnsocm
    johnsocm over 12 years ago

    Very Nice to see it that small. I wanted to do the same thing and make a SUPER small version but looks like you beat me to it! Nice job!

     

    Chad

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