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Inductive charging (also known as wireless charging or cordless charging) is a type of wireless power transfer. It uses electromagnetic induction to provide electricity to portable devices. Inductive charging is also used in vehicles, power tools, electric toothbrushes, and medical devices.
When the harvested power is used to supply the power of wireless information transmitters, the network is known as Simultaneous Wireless Information and Power Transfer (SWIPT); [18] whereas when it is used to supply the power of wireless information receivers, it is known as a Wireless Powered Communication Network (WPCN). [19] [20] [21]
The resonant circuits were coils of copper wire which resonated with their internal capacitance (dotted capacitors) at 10 MHz. Power was coupled into the transmitter resonator, and out of the receiver resonator into the rectifier, by small coils which also served for impedance matching. In this regard, MIT researchers believe they discovered a ...
In backscatter modulation, the power-receiver coil is loaded, changing the current draw at the power transmitter. These current changes are monitored and demodulated into the information required for the two devices to work together. [2] In 2011, the Wireless Power Consortium began to extend the Qi specification to medium power. [11]
The system consists of a transmitter and a receiver. Transmitter connects to a standard power outlet and converts electricity into infrared laser beam. Receivers use a miniature photo-voltaic cell to convert transmitted light into electrical power. Receivers can be embedded into a device or connected into an existing charging port.
The post You can add wireless charging to your old iPhone for $17 appeared first on BGR. We know people who are still using the same iPhone model they bought five years ago. That’s incredible!
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