Coin Based Water Dispenser System using pic microcontroller

Coin based water dispenser system is fully automated system that enables the user to get water or cola automatically without wasting any time by just inserting the silver coin in an automated machine. Normally in remote areas such as mountains or desert land forms, the supply of water or cola is a very difficult task because lake of human life or electricity. Beside this, in shopping malls, supper stores, universities or community centers where when any one wants to just drink water or cola then he wastes so much time due to long row of customer. In these places, if any automated machine or automated water or cola dispenser system would be installed then everyone can save their precious time.

So many systems are available in market like this but that systems are so much costly as well as not so much reliable and efficient. Here we have been presenting a system that is called a coin based water dispenser system. This system has designed with the help of coin sensor, water pump, IR sensor, LCD display, single phase step down ac transformer, bridge rectifier, voltage regulator and microcontroller PIC18F452  belongs to 8 bit pic family. This system also has coin detect facility means when a valid coin is inserted in this machine then it will work otherwise it will not work. The block diagram of this coin based water dispenser system with all their essential components is shown in figure1

Block Diagram of Coin Based Water Dispenser System

Here is the block diagram of coin based water dispenser system with all their essential components,

Figure1 Block Diagram of Coin Based Water Dispenser System with all their Essential Components

Working Principle of Coin Based Water Dispenser System

This coin based water dispenser system works on the principle of coin detector when any one or customer will insert the silver coin in coin sensor, then first, this sensor will detector the coin means it will check, is it valid or not if it is not valid then it will not give the logic high signal to microcontroller. Similarly, if it is valid then it will give the logic high signal to microcontroller then microcontroller will turn on the water or cola pump. When it will turn on then it will full up the glass. During filling the glass this system will continuously check the quantity of water or cola through IR sensor. When water pump will fill up the glass then IR sensor gives the logic signal to microcontroller then microcontroller will turn off the water pump. IR sensor also tells the presence of glass means it tells the microcontroller that turn on the water pump because glass is available here. Similarly, if glass is not available then it tells the microcontroller don’t turn on the water pump. In this whole system, microcontroller is the main intelligent controller of this system.

It is programmed in c language with help of mikro/c software and is interfaced with LCD display IR sensor, water pump and coin sensor. LCD display, displays the whole process of this system and it also displays that your inserting coin is valid or not. This system is directly coupled with 230V ac supply, because it mostly consists of electronic components therefore these ac voltages are step down to 9 or 6 V ac with help of step down ac transformer then these are converted into dc with the help of bridge rectifier. Then these are regulated to 5V dc with help of voltage regulator and LM 7805 voltage regulator have been used here for this purpose. Microcontroller, LCD display sensor and coin sensor are powered up with help of this voltage regulator. So, no need of any extra power supply or adapter to power on this system.

Applications and Advantages of Coin Based Water Dispenser System

1. This coin based water dispenser system could be installed in shopping malls, super stores, universities, community centers, petrol pumps and CNG stations for supplying automatic water or cola to the people.
2. By using system, any company can reduce the man power and save the money.
3. This coin based water dispenser system is more compact, more efficient, more reliable and less costly as compared to other systems.