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Stamp Value Calculator for Postage Needs
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PROJECT DESCRIPTION

The aim of this project is to develop a stamp value calculator for the postal operations that is carried out in a post office. These postal letters are tariffed at the post offices depending on the weight of the postal letter measured on a weighing scale.

Normal weight checking instruments used in the shops like the grocery stores are not applicable in post offices, where the weights range from kilograms and above, but in post offices the weights are considered in the order of grams and the tariff rate is imposed accordingly.

Hence, there is a need of a precise weighing scale that can measure the weights in grams and display it. This concept can be achieved by an electronically weighing machine. This proposed system can fulfill the desired functionality and it is exact in its precise weight measurement and price of the stamp required.

This system is built upon using an 8051 microcontroller, which uses weight sensor by a spring loaded variable resistor to determine the weight of the particular letter placed on it. This data is processed through an ADC which is interfaced to the microcontroller to generate an appropriate display on the LCD, both in terms of weight and its corresponding stamp value required.

This project can be enhanced by integrating a mini printer with this system, which can be used for printing the value of stamp for franking machines. It can also be interfaced with a keypad and an EEPROM to store the price details corresponding to its weight.

PROJECT HIGHLIGHTS
Extensive audio-visuals available.
Branding-free material.
Call/mail for Tech Support from 10 am - 7 pm.
Pre-programmed Microcontroller.
All-inclusive solution kit.
Easy to use, Self-explanatory kit.
BLOCK DIAGRAM
Hardware Requirements
  • Transformer
  • Bridge Rectifier
  • Regulator
  • 8051 series Microcontroller
  • LCD
  • ADC
  • Potentiometer
Software Requirements
  • Keil compiler
  • Language: Embedded C or Assembly.
Q & A
Q:  Can I measure weight of any letter, post in grams directly?
A:  Yes you can measure the weight of any letter.
Q:  Will I see the scale arrangement on the kit?
A:  Please watch the video for an alternate arrangement to reduce cost.
Q:  Is it possible to feed/set the price per gram as per requirement?
A:  No, it is pre-programmed for fixed price only.
Q:  Which microcontroller is used in this project?
A:  The microcontroller used in this project is a 40 pin IC from 8051 family.
READ WHAT OTHERS HAVE SAID
Average Rating
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Showing 1 of 1 reviews
Ratna Mohan, on 15th April, 2013, 02:00 AM

THE PROJECT TITLE IS VERY IMPRESSIVE AND ALSO THE ASSEMBLED TESTED BOARD IN DIY.

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