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IEEE paper for coin based mobile charger

ABSTRACT:-
The coin-based mobile battery charger developed in this paper is providing a unique service to
the rural public where grid power is not available for partial/full daytime and a source of revenue for site
providers. The coin-based mobile battery charger can be quickly and easily installed outside any business
premises. The mobile phone market is a vast industry, and has spread into rural areas as a essential means of
communication.While the urban population use more sophisticated mobiles with good power batteries lasting
for several days, the rural population buy the pre owned mobile phones that require charging frequently. Many
times battery becomes flat in the middle of conversation particularly at inconvenient times when access to a
standard charger isn't possible. The coin-based mobile battery chargers are designed to solve this problem. The
user has to plug the mobile phone into one of the adapters and insert a coin; the phone will then be given a
micro-pulse for charging. It does not bring a mobile from 'dead' to fully charged state. The charging capacity of
the mobile is designed with the help of pre defined values. It is, of course, possible to continue charging the
mobile by inserting more coins. This compact and lightweight product is designed to cater for the growing
number of rural mobile users worldwide. A suitable microcontroller is programmed for all the controlling
applications. The source for charging is obtained from direct power grid and solar energy in case of non
availability of grid power.