Inductive charger for electric toothbrush

Inductive charging uses an electromagnetic field to transfer energy between two objects.

This is usually done with a charging station.

Energy is sent through inductive coupling to an electrical device (base of toothbrush),

which then can use that energy to charge batteries in arm of toothbrush.

Induction chargers typically use an induction coil to create an alternating electromagnetic field from within a charging base station,

and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electrical current to charge the battery.

The two induction coils in proximity combine to form an electrical transformer.

The resonance frequency in our project is 66KHz. It’s generated by astable multivibrator generated by NE555.

The arm of the tootbrush receive the EM field and convert by diode and capacitance in DC voltage for charging the inside battery.



The full story in EMITER 2/2012:

Write Primarius D-r Petar Avramovski.

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