Pay and use power system using coin sensor

Description

In this kit pay and use power system using coin sensor, we have tried to reduce the wastage of electrical power which often arises due to negligence of the user. Here we have to make a power system in such a way that, the user can use it only for a limited period of time after paying for it. A precise coin acceptor is there to accept the coin, and it generates the power only after the proper amount of coin (as defined by the user) is inserted. For each unit of price, the power is available only for a limited period. The time left for usage will be shown on the LCD continuously.

In the kit pay and use power system using coin sensor, there is a coin acceptor which can be calibrated by the user by inserting a standard coin to it. The microcontroller can sense the number of the standard coin inserted by the user, hence can calculate the time window for that particular user. There is a dot-matrix LCD that displays the time remaining for the user. A relay is there to control the power, which is interfaced with the microcontroller. If the time period gets elapsed the microcontroller turns off the relay, hence the power gets disconnected.