When a coin is entered into the coin-based mobile charging system, the phone is charged. This technology is used by store owners and rural residents, and it can be deployed in public places such as train stations and bus stops to allow mobile charging. As a result, the coin acceptor detects legitimate coins and alerts the Arduino to take action. If a genuine coin is found, the Arduino receives a signal and begins the mobile charging mechanism, which provides a 5v supply to the phone via a power supply section. To display the charging time for the cell phone, the Arduino launches a reverse countdown timer. The user then inputs another coin, which the Arduino adds to the time left and decrements the countdown once more. And also here we connect Arduino to the internet by adding ESP8622 WI-FI module. It is a wireless and everything will be done on offline. It enables IoT service. Which updates the number of entries of a coin to the system. It will available in server side. This method can be used to charge smart phones in public settings. This coin-based mobile charging device provides sufficient power to the phone and is available on demand in public settings.
The goal of this idea is to insert a coin utilizing a mobile phone charging in public places. This invention will be incredibly beneficial to those who use their phones in public locations without being able to charge them. In this initiative, everyone who uses a cellphone outside of the home is working in an office that is not equipped with a charger. The coin-based mobile phone charger comes in handy for those who prefer to charge their phones using coins. The IR receiver is utilized on the receiver side to receive the IR signal. To adjust the polarity of the pulse in SCU input, place a coin between the IR transmitter and receiver. The SCU converts low pulses to high pulses, which are then inverted in the inverter. The 555IC is used as a timer to generate a high pulse for a set amount of time. The SCU's gain is utilized to convert low pulses to high pulses, and the output is sent into the driver circuit's input. The driver circuit ensures that the relay's input voltage is sufficient. The relay will activate, allowing us to utilize the 230v charger to charge our phones. The ESP8622 WI-FI module was used to link Arduino to the internet. Because of its simple serial communication connectivity, the ESP8622 WI-FI module can be used as a server, WI-FI adapter, and wireless internet access interface for any microcontroller. Our ESP8266 will function as an Access Point (AP Mode), allowing other devices (stations) to connect to the Wi-Fi network over a wired network. The ESP8622 WI-main FI's purpose is to update the number of entries in the system's currency status to the cloud, which only requires one communication channel. The ESP8622 WI-FI module is used to establish a connection as well as to enable IoT services (cloud computation). The server will send the date and time. The coin acceptor determines if the coin is valid or not after it has been entered. The power is only available for a limited time for each unit of pricing. Based on the number of coins inserted, the Arduino can calculate the time. This approach is beneficial to persons who travel vast distances.
II. EXISTING SYSTEM
In previous models, the mobiles were charged using various types like solar panel, coin-based charging. This coin based mobile charger is used to charge the mobile phones in case of emergency provided that they don’t have power bank. So this project model can be implemented in streets or they could be fixed to the post. The charging time for the phone is displayed on the LCD. In addition, a sun panel may be used to fee the device. Solar energy is used to charge cellphones in the majority of cases since it converts light energy into DC current. Insertion of a fixed coin size for charging is not developed during the existing system of the process.
III. PROPOSED SYSTEM
The existing system on the process would have been elaborated by the system where with the help of the IR sensor it checks the coin is valid or not. Here we are checking the real coins. If it is valid sends particular signal to the Arduino where it can be processed as a fact that it can be provided to the LCD display for the time duration for which it is done and for which it is provided as a display for the process.
And also it contains the WI-FI module which gives number of entries of a coin status to the system of cloud and it is based on the IOT service. Date time will be send on server side through mobile hotspot. It also have multiple pin to charge different mobiles.
IV. LITERATURE SURVEY
The main aim of the research is to provide charger based on the coin insertion. The System works according to the code that written in the microcontroller where we dumped the code in Arduino. When the coin is inserted, it checks valid coin or not. if it is valid send signal to the Arduino and then Arduino starts the mobile charging mechanism providing 5v power supply section to the mobile phone.  An infrared (IR) is used to send an IR signal from the transmitter side. The IR receiver is utilized on the receiver side to receive the IR signal. To adjust the polarity of the pulse in the input, place a coin between the IR transmitter and receiver The relay will activate, allowing us to use the 230v charger to charge our phone. When the coin is detected, the 555 timer receives a pulse, which triggers the relay (Electromechanical switch) and allows the cell phone to be charged.  This research will give a one-of-a-kind service to the general population.
V. SYSTEM ARCHITECTURE
Figure 5.1 depicts the architecture of the system. In this figure we are providing 12v power supply which is connected to Arduino UNO and also parallelly connected to coin Acceptor. Inside the Arduino we having two voltage regulator one is converting 12v to 5v for LCD and relay another is 3.3v which is connected to WI-FI module. And for charger 7805v regulator because Arduino UNO regulator can’t provide enough current to WI-FI module
A. Hardware Components
1. Coin Acceptor: Through a coin insertion slot, the coin acceptor gadget accepts the coin. The CH-936 multi-coin sensor was utilised in this experiment. The coin acceptor's sensor will recognise and confirm the coin depending on its diameter. When the inserted coin is authenticated, it sends a signal to the Arduino, which turns on the power supply; otherwise, the coin is returned
XI. FUTURE SCOPE
In our work, we provided coin based mobile charger Arduino, relay, coin sensor, WI-FI module which gives updates for number of coin entries. Furtherly, we can also develop this as revenue generator by implementing GUI application.
The new manner of offering chargeable services to the general public is described in our article. For the convenience of users, coin-based mobile charging stations have been erected in a number of public locations. It is also less expensive and more convenient for long-distance passengers.