International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May-2017
p-ISSN: 2395-0072
www.irjet.net
Coin Operated Water Dispenser Aditi Mohan1, Niyati Tiwari2, Rajdeep Ghosh3 , Prof. A.A Shinde4 1,2,3 Btech
in Electronics Engineering, BVDUCOE, Pune , Maharashtra, India in Electronics Engineering, BVDUCOE, Pune, Maharashtra, India ---------------------------------------------------------------------***-----------------------------------------------------------------4 Professor
Abstract - This paper presents the description of Coin Operated Water Dispenser. The water dispensing machine dispenses water on the detection of the right coin (correct denomination).The dispenser is designed using At mega controller. It can be used in public places like Roads, Railway stations, shopping Malls etc. It can prove to be of great use and comfort for people. Key Words: Microcontroller, LCD, Water pump, Coin Sensor, IR Sensor
1. INTRODUCTION Fig -1: Block diagram
With the advancement of technology the ‘Coin Operated Water Dispenser’ provides comfort and it fits well for its users in the era of modernization .
1.2 Hardware and Software Description a. b. c. d. e. f. g. h. i.
Regulated power supply is designed to provide system with constant supply of 5 volts. The dispenser will dispense water only when the correct coin is inserted as well as with the placement of glass below the nozzle. The correctness of coin is detected by the coin sensor and the object detection is done by an IR sensor. If both the conditions are satisfied then a signal is given to the microcontroller and accordingly water pump gets activated and water will be dispensed.
1.1 Block Diagram
Arduino/ATmega 328
The block diagram for Coin operated water dispenser is shown in fig.1:
ATmega 328 is a single chip microcontroller created by Atmel in the mega AVR family. It is a RISC based microcontroller that has 32 KB ISP flash memory. This chip is implemented on the popular platform called as Arduino development platform, Arduino Uno or Nano models. ATmega 328 of Atmel is an 8 bit processor in 28 pin DIP package. It works on 5 volts power supply. It has 14 digital input/output pins and 6 analog inputs .ATmega 328 has 2 KB of SRAM and 1KB of EEPROM. Arduino can be powered via USB connection. The 14 digital pins on UNO can be used as input and output pins using ‘Pin Mode( )’, ‘digital Write( )’,’ and digital Read( ) functions. The 6 analog inputs are labeled from A0 to A5.A reset pin is there to reset the microcontroller. It provides UART serial communication with computer.
The first three blocks- transformer, rectifier and regulator are used for getting a regulated power supply. The four blocks- Display, water pump, IR sensor, Coin sensor are interfaced with Arduino/ATmega328.
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Arduino/ATmega 328 Transformer Rectifier Regulator IR Sensor LCD Coin sensor Water pump C language programming in arduino
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