Wireless Charging System

Mobile phones becoming a basic part of life, the recharging of mobile phone batteries has always been a problem. The mobile phones vary in their talk time and battery stand by according to their manufacturer and batteries. All these phones irrespective of their manufacturer and batteries have to be put to recharge after the battery has drained out. The main objective of this current proposal is to make the recharging of the mobile phones independent of their manufacturer and battery make.Now we will explain it by using induction principle.This is based on 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, which then can use that energy to charge batteries. Because there is a small gap between the two coils employed in each of the sender and receiver of the energy within the respective devices, inductive charging is considered a short distance wireless energy transfer, despite the fact that there are typically more wires used with inductive charging than direct contact charging, because it frees the user from having to deal with wires between the two devices. 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.Use of embedded technology makes this system efficient and reliable. Micro controller (AT89S52) allows dynamic and faster control. Liquid crystal display (LCD) makes the system user-friendly. AT89S52 micro controller is the heart of the circuit as it controls all the functions.

The project is used in multiple ways such as in securing the mobile from loss or theft as well as it gets charged wirelessly. If any one wants to steal it automatically a 60 Db siren will get a switched ON. The system is provided with a control switch it has to be made ON such as if the user wants to charge mobile it will be placed on this inductive plates .Once the charging is completed if it is removed without making the switch OFF automatically siren will be alerted.An alternative charger circuit is also provided to charge the mobile by house hold general purpose 230V in the absence of the induction. This charge circuit uses regulated 5V, 750mA power supply. 7805 three terminal voltage regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac output of secondary of 230/18v step down transformer.