From: Denny Esterline <desterline@gmail.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Mon, 3 Feb 2020 20:27:49 -0800
Subject: Re: [EE] Power transmission
Thread-Topic: [EE] Power transmission
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Your needs and goals are a bit vague, but I suspect you could start with
these- in concept at least.

https://www.amazon.com/IGOUKJ-Endurable-Interface-Universal-direction/dp/B0=
72BSC4G2
<https://www.amazon.com/IGOUKJ-Endurable-Interface-Universal-direction/dp/B=
072BSC4G2/ref=3Dmp_s_a_1_8?keywords=3Dqi+charger+receiver&qid=3D1580790228&=
sr=3D8-8>

Available from the typical Far East sources for considerably less.


On Monday, February 3, 2020, Neil <picdude3@narwani.org> wrote:

>
>
> On 2/3/2020 8:31 PM, RussellMc wrote:
> > How much power?
> Not sure yet.  I'm more tinkering at this point.  But let's say ~ 1 watt
> for now.
>
> > What distance between TX:RX?
> I have a very small gap directly behind the 1/2" MDF panel, but if I can
> place the transmitter on the back of the wall, I'd have a LOT more space
> for the transmission coil.  That would be 6" or more away.
>
> > What limitations on dimensions of send and receive units?
> Receive would have to be considerably smaller, but I can have several
> (maybe 10-20) receivers.
>
> > Any cost factors?
> Cost is always a factor -- I'd prefer not to spend a grand on this :)
>
> > Why is a hole unacceptable?
> This is an idea for a artwork that will change periodically.
>
> > What are the materials used at and near the power transmission site? (e=
g
> > are the wall panels made of mumetal?, ...? )
> Walls are drywall (open space in-between), though one may even be
> plaster on cinder block.
>
> > Any other relevant stuff?
> I'm really just tinkering with the idea right now and thought I'd learn
> about it.  I'm very clueless about what frequencies would be better
> (distance-wise).
>
> Cheers,
> -Neil.
>
>
> >
> >
> >
> >             Russell
> >
> >
> > On Tue, 4 Feb 2020 at 11:43, Neil <picdude3@narwani.org> wrote:
> >
> >> I'm tinkering with power transmission for getting power from behind a
> >> wall panel to in front.  For now I'm just experimenting with the idea,
> >> but I can't find much info on the relationship between coil diameter,
> >> wire diameter, number of turns, frequency, and distance.
> >> Anyone here know anything about this?
> >>
> >> Cheers,
> >> -Neil.
> >>
> >>
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