配線やバッテリーは不要！ 水中でも使用可能！
高性能ワイヤレスLED「X-BASE(クロスベース)」
X BASE WIRELESS (not wireless as in RF, just the current to LEDs is induced magnetically) LEDs , the LED cubes are water proof.
GREEN FUNDING ( X BASE project team is looking for funding)
https://greenfunding.jp/lab/projects/2009?utm_medium=GREENFUNDING&utm_source=Portal
This is the theory (high school or secondary school physics). Changing magnetic flux through the wire coil (inside each of the LED assembly) induces a current in the coil .
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html#c1
This one is easier to understand.
https://www.electrical4u.com/faraday-law-of-electromagnetic-induction/
The changing of magnetic field (or flux , magnetic field per unit area enclosed by the coil) comes from external voltage supply , so it is incorrect to say these LEDs do not use batteries (voltage , thus current ) , it is just that the voltage supply is not inside the LED cubes, it is the external AC adapter that provides the current to change the magentic field that in turn induces emf (thus current) needed by the LEDs.
This is the same technology used to charge electric devices "wirelessly"
Put theory into practice.
If you like the mathematics behind it "
The EMF (electric motive force, the difference in voltage between two points) induced depends on :
The number of turns in the wire coil, N.
The cross-sectional area enclosed by the coil , A.
ΔB magnetic field , ΔB A will give the magnetic flux
emf = - N ΔBA / Δt or emf = - N Δ Φ / Δt where Φ = B A
ΔBA / Δt is the changing of magnetic flux with time , this induces an emf (thus a current) to power the LEDs , so "wireless".
The faster the change of magnetic flux through the wire coil, the larger the induced emf .
The - sign can be explained by Lenz's law, see below.
Lenz's Law
Changing of magnetic field (magnetic flux) induces an emf thus a current in a wire coil but the generated current in the wire coil also generates a magnetic field around the wire, this current generated magnetic field will oppose the external magnetic field that induces the current in the wire, thus the negative sign in the equation.
Read this if you are confused.
A picture is worth 1000 words
https://www.electrical4u.com/lenz-law-of-electromagnetic-induction/
AC adapter Input : 100V- 240V , 50/60 Hz , 0.6A, so it can be used world -wide. Output : 12 V at 2 A
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