The development of Wireless Power Bank with Bluetooth speaker

Abstract

The development of Multifunction Power bank is a new innovation in this modern era and technology .Multifunction power bank have dual functions that can make life easier .Power bank is dedicated input socket for receiving power, this power come from a USB socket .It use a 240v power supply with 12 volt battery for charging. Depending on the capacity of the power bank and the current charge level, it can take quite a while to fill up around 1 hour. Additionally, this power bank also include a wireless power transfer charging, i.e a system of transferring electrical power through the air. The basic component used in wireless power transfer is the primary coil and secondary coil by using the induction theory. When the, AC current flow in the primary coil, it will induce amount of AC voltage in the secondary coil through the electromagnetic field between both coils. The AC voltage then can be used to power a device or charge a battery after converting the AC to DC voltage using bridge rectifier. When the first object (as primary coil) vibrate at a certain frequency within close contact with the second object, then the second object (as secondary coil) resonates at the same frequency as the first. By using the resonant circuits, the process of wireless power transfer can be increased to centimeter distance. Another function integrated into the system is a Bluetooth speaker, making it convenient for user who want audio for outdoor use, instead of buying an expensive sound system. Moreover, by using a Bluetooth speaker, user can connect or pair many devices in one time operation with the system has .This system can be controlled either with a handset that has a Bluetooth connection and music play within apple or android model. This multifunction power bank make it easier for the user to bring only one product which has a multipurpose function where the user can charge as a normal charging or wireless power transfer charging while enjoying the audio music using Bluetooth speaker.