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Adafruit Industries Adafruit Inductive Charging Set 5V 500mA max

This is a basic charger set, and it does work, providing 5V DC output from the output half when the input half is powered with 9V to 12VDC.
Art-Nr 5998724
 approx. 5-7 days Currently > 5 piece(s) in stock at the supplier

Availability

  • approx. 5-7 days
    Currently > 5 piece(s) in stock at the supplier

If ordered immediately.
Information subject to change.

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Description

The squarish board with two chips on it is the transmitter (power with
9V). The longer board is the output and you can connect that to the
part of your project that needs powering.

Inductive charging is a way of powering a device without a direct wire
connection. Most people have seen inductive charging in a rechargable
electric toothbrush: you may have noticed that you recharge it by
placing it into the holder, but there's no direct plug. These chargers
work by taking a power transformer and splitting it in half, an AC
waveform is generated into one, and couples into the second coil.

This is a basic charger set, and it does work, providing 5V DC output
from the output half when the input half is powered with 9V to 12VDC.
You can draw as much as ~500mA if the coils are 2 or 3 mm apart. If
you only need 100 or 200mA you can be up 7mm apart. For 10mA draw, the
coils can be up to half an inch (12.5mm) apart. Any
non-ferrous/non-conductive material (eg air, wood, leather, plastic,
paper, glass) can be used between the two coils. The material doesn't
affect the distance or efficiency. The coils do need to be fairly
co-axial, try to get them to be parallel and have the circles line up
for best power-transfer. (This is why the electric toothbrush must fit
into the plastic holder, it's lining up the two coils for best
efficiency)

Because its an air-core transformer, it's fairly inefficient. Only
about 40% of the energy in shows up on the other end, but for low
power or charging project. If you draw 5V 100mA on the output side
(0.5W), you'll need 0.5W * 2.5 / 9V = ~150mA from the input end. The
quiescent current is about 70mA at all time, even when the other coil
is not anywhere near by.

These are basic modules, probably used for some low cost toy. We
don't have any datasheets or specifications for them. We do see a
feedback resistor divider on the output side using 0603 SMT resistors
so an advanced user could solder in different values to turn it into a
3.3V output.

Details:

* Coils are 1.5"/38mm diameter
* Receiver weight: 5.5g
* Transmitter weight 5.7g
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Specifications

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General information

Manufacturer Adafruit Industries
Product type Electronics module
Item number5998724
Manufacturer no.ada-1407

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Warranty 24 month Bring-in

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Availability

Mail delivery

 Expected delivery time: approx. 5-7 days
Currently > 5 piece(s) in stock at the supplier

Collection

All locations

 Expected delivery time: approx. 5-7 days
Currently > 5 piece(s) in stock at the supplier

If ordered immediately.
Information subject to change.

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Adafruit Industries Adafruit Inductive Charging Set 5V 500mA max Adafruit Industries Adafruit Inductive Charging Set 5V 500mA max