Author Topic: Motherbox Indiegogo  (Read 7554 times)

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Offline abdullahseba

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Motherbox Indiegogo
« on: February 21, 2017, 07:39:12 am »
Hi
Not sure if anyone has mentioned it before, but I was looking at this wireless charger called "MotherBox"! on Indiegogo that claims to charge phones 2W at 20 inches.
Is this possible or is it  :bullshit:......
https://www.indiegogo.com/projects/the-motherbox-true-wireless-charging-power-phone--2#/
 :-\ :'( >:(
« Last Edit: February 21, 2017, 07:43:39 am by abdullahseba »
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Offline Ice-Tea

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Re: The MotherBox......Wireless charging 2W at 2 inches possible?
« Reply #1 on: February 21, 2017, 08:13:52 am »
BS.

Others will chime in with math, but: BS.

What has me doubting is the "Arrow certified" thingie. Arrow is supposed to know better, so either they have just pissed away their credibility or..

Online mikeselectricstuff

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Re: The MotherBox......Wireless charging 2W at 2 inches possible?
« Reply #2 on: February 21, 2017, 08:51:36 am »
Inverse square law dudes....

Doubt 20" is doable with an antenna that size. 10" maybe, but wasting a lot of power
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Offline Ice-Tea

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n
« Reply #3 on: February 21, 2017, 09:27:45 am »
Inverse square law dudes....

Doubt 20" is doable with an antenna that size. 10" maybe, but wasting a lot of power

And the receiver is stuck to... whatever. Plastic. Aluminium. Apparently doesn't seem to matter  :palm:

Online mikeselectricstuff

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Re: n
« Reply #4 on: February 21, 2017, 09:31:52 am »
Inverse square law dudes....

Doubt 20" is doable with an antenna that size. 10" maybe, but wasting a lot of power

And the receiver is stuck to... whatever. Plastic. Aluminium. Apparently doesn't seem to matter  :palm:
Yes.... the Qui  chargers use a ferrite backing to isolate it from the metal backing, at the expense of only workng in very close proximity.
 The metal in a phone is going to damp the crap out of the receiver coil
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Offline ZeTeX

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Re: The MotherBox......Wireless charging 2W at 2 inches possible?
« Reply #5 on: February 21, 2017, 09:41:32 am »
Unless there will be huge discovery about a way to transmit fairly large amount of power efficiently over long distances, any wireless charger on the market is garbage.
« Last Edit: February 22, 2017, 11:45:40 am by ZeTeX »
 

Offline Halcyon

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Re: The MotherBox......Wireless charging 2W at 2 inches possible?
« Reply #6 on: February 21, 2017, 09:42:44 am »
I don't know the math behind inverse square law etc... other than Watts = Amps x Volts... are we assuming that the 2 watts is at 5 volts? That's 400mA... is that really so unbelievable? It doesn't seem like an awful lot considering even the current wireless chargers will pass through some materials, not to mention quite a bit of thin air. I can see that the difference between the amount of energy vs. the amount actually radiated will be great... the point of these things is not to conserve energy, but to avoid plugging things in (be it laziness or otherwise).

I actually don't mind the idea of wireless charging. Even though I have a relatively high-end Android handset, those tiny little micro USB connectors won't last forever with repeated connections/disconnections (through daily charging and data connections). I already find some USB cables don't make proper contact even though my phone and battery still have another good few years left in them.
« Last Edit: February 21, 2017, 09:48:04 am by Halcyon »
 

Offline abdullahseba

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Re: The MotherBox......Wireless charging 2W at 2 inches possible?
« Reply #7 on: February 21, 2017, 09:45:23 am »
Hmm.... Sounds good Dave should do another debunk.
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Online mikeselectricstuff

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Re: The MotherBox......Wireless charging 2W at 2 inches possible?
« Reply #8 on: February 21, 2017, 11:27:40 am »
I don't know the math behind inverse square law etc...
Double the distance = 25% of the magnetic field.
Current solutions work over a few mm.

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Offline ChrisGreece52

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Motherbox Indiegogo
« Reply #9 on: February 21, 2017, 12:31:58 pm »
Hey guys, I just seen this product.
The Motherbox claims  can charge wirelessly your phone using a special case from serveral feet away... is it just me or you smell the bullshit too ?
Verified by Arrow Electronics!
Youtube Video :
Indiegogo Campain : https://www.indiegogo.com/projects/the-motherbox-true-wireless-charging-power-phone--2
« Last Edit: February 21, 2017, 12:35:24 pm by ChrisGreece52 »
 

Offline EEVblog

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Re: Motherbox Indiegogo
« Reply #10 on: February 21, 2017, 12:35:35 pm »
Oh FFS, just use a Qi charging pad  |O
 

Offline EEVblog

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Re: Motherbox Indiegogo
« Reply #11 on: February 21, 2017, 12:42:13 pm »
CEO is an MBA and they have an "Advisory board", tells you all you need to know.
And I haven't even watched the video yet, should I waste my brain cells?



Translation:
"We have been working on this for 3 years solid but are still dicking around with getting the thing working well. But don't worry, once we have your money we'll magically get it right."
 

Offline ChrisGreece52

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Re: Motherbox Indiegogo
« Reply #12 on: February 21, 2017, 12:44:23 pm »
This is something else it claims crazy stuff like 2 watts at 20 inches and for us with normal measurement units that is 50.8 cm
 

Offline ChrisGreece52

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Re: Motherbox Indiegogo
« Reply #13 on: February 21, 2017, 12:45:35 pm »
Also thanks for you time Dave! And i love your answers to these topics.
 

Offline EEVblog

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Re: Motherbox Indiegogo
« Reply #14 on: February 21, 2017, 12:57:28 pm »
I couldn't hep myself:


Too harsh?

I know they have worked on this for years, not taking that away from them, but how many times have we seen this now?
 

Offline EEVblog

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Re: Motherbox Indiegogo
« Reply #15 on: February 21, 2017, 12:58:42 pm »
LOL
They should have just got Jesus himself


 

Offline EEVblog

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Re: Motherbox Indiegogo
« Reply #16 on: February 21, 2017, 01:03:46 pm »
That's why they need the app, so it can "shape" the magnetic field.

 

Offline cat87

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Re: Motherbox Indiegogo
« Reply #17 on: February 21, 2017, 01:45:25 pm »
So, they're using Wank Yank technology. That figures.

So, looks like the CEO is a self-taught engineer.... That might be admirable for any man, to be self-taught and become the CEO of something.. too bad he skipped a few chapters on electromagnetic propagation and RF stuff.

Online nctnico

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Re: The MotherBox......Wireless charging 2W at 2 inches possible?
« Reply #18 on: February 21, 2017, 09:48:10 pm »
I don't know the math behind inverse square law etc...
Double the distance = 25% of the magnetic field.
Current solutions work over a few mm.
It depends on how you setup the system. Getting 50W over a few centimeters with around 70 to 80% efficiency is doable with commercially available coils (been there, done that and I didn't push the limits).
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Offline trophosphere

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Re: The MotherBox......Wireless charging 2W at 2 inches possible?
« Reply #19 on: February 21, 2017, 09:58:26 pm »
BS.

Others will chime in with math, but: BS.

What has me doubting is the "Arrow certified" thingie. Arrow is supposed to know better, so either they have just pissed away their credibility or..

The Arrow certified thing is more to make sure that you have an established plan of component procurement for manufacturing. They are looking more towards convincing you to purchase your components from them rather than looking at feasibility. There is some arbitrary common sense that is exercised but it is limited to just a superficial first pass evaluation.
 

Offline abdullahseba

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Re: Motherbox Indiegogo
« Reply #20 on: February 21, 2017, 10:17:34 pm »
Wow looks like I got here first  ;D
Will you debunk in a video dave?
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Offline chickenHeadKnob

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Re: Motherbox Indiegogo
« Reply #21 on: February 21, 2017, 10:49:00 pm »
From the comments section of the greasy haired jesus spokesman video dave pointed to above:


Curtis Carlson   Curtis Carlson21 hours ago
It would be interesting if the Motherbox Mini could be charged by the larger Motherbox.

       Yank Technologies, Inc.       Yank Technologies, Inc.20 hours ago
       Great point! This is something we actually plan on working on.

               script dil               script dil7 hours ago
               with a trend like that you will finally build a planet size Motherbox to charge other mega Motherboxes. Terrifying and cool thought as same time

 :palm: :-DD
 
« Last Edit: February 22, 2017, 11:26:57 pm by chickenHeadKnob »
 

Offline rfeecs

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Re: Motherbox Indiegogo
« Reply #22 on: February 22, 2017, 12:21:10 am »
I don't see that it is obviously bullshit.  They are claiming 2W at 20 inches, 8W at 10 inches.  Looks like inverse square.



Clearly not at all efficient.  They aren't claiming that it is efficient.

It should be possible to steer the near field with a phased array of coils.  Doesn't seem totally crazy.

But still, given their team and their funding target, I think they have zero chance of success.
 

Offline f4eru

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Re: n
« Reply #23 on: February 22, 2017, 05:20:48 pm »
Yes.... the Qui  chargers use a ferrite backing to isolate it from the metal backing, at the expense of only workng in very close proximity.
 The metal in a phone is going to damp the crap out of the receiver coil
Yep. Especially if they use a sharp resonance at the receiver coil.
Perhaps it's a high Q only at the transmitter ?

Offline Danseur

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Re: Motherbox Indiegogo
« Reply #24 on: February 24, 2017, 07:28:22 am »
What it looks like they built was a 3-axis induction coil hitting the X, Y, and Z axis. Then they plan to only activate the coil that is most aligned with the receiver coils.  This assumes you have a receiver that is aligned with either X, Y, or Z but what happens if your receiver is at some skewed in-between angle where it's half way between X and Y axis?  The efficiency would probably drop even lower.  If you didn't care about efficiency and the resulting bulk or care about using a 40 Ah battery to deliver 4 Ah at 10 inches, I guess this can theoretically "work" if they can successfully implement everything they want to do.

The other key problem is that despite their ad complaining about the bulky conventional induction charging pads, they come out with an even bigger device that's probably 10X the volume.  Now they could argue that they could fill that space with batteries, but do people want to carry a massive heavy ball just to charge their phone one time?  Or do they just want to get a tiny low cost contact-based battery pack and deliver the same energy with a simple 20 inch cable that also works in any orientation?

Witricity is probably the closest to getting a resonant induction solution onto the market and even they're having a hard time gaining traction.  Witricity can probably deliver much better efficiency with more precise coupling.
« Last Edit: February 24, 2017, 07:40:24 am by Danseur »
 


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