You Are Here: Home » AVR ATmega Projects » Calculator Projects

Distance Measurement using HC-SR04 and AVR Microcontroller

In this tutorial we are going to discuss and design a circuit for measuring distance. This circuit is developed by interfacing ultrasonic sensor“HC-SR04” with AVR microcontroller. This sensor uses a technique called “ECHO” which is something you get when sound reflects back after striking with a surface. [caption id="attachment_34885" align="aligncenter" width="600"] Distance Measurement using Ultrasonic Se ...

Read more

Boolean Algebra Calculator

Power Supply: It can be defined as a device that supplies electrical energy to one or more electric loads. The term is most commonly applied to devices that convert one form of electrical energy to another, though it may also refer to devices that convert another form of energy (e.g., mechanical, chemical, solar) to electrical energy. In our project a supply mains that is 5volt d.C. is given to the microcon ...

Read more

2 Digit Up/Down Counter Circuit

Generally, one can see the digital displays which display the score when buttons are pressed on score boards. The main heart of this score board is 2 digits up/down counter circuit. The 2 digits are displayed on two 7 segment displays. This article describes 2 digit up/down counter circuit. 2 Digit Up/Down Counter Circuit Principle: The main principle of this circuit is to increment the values on seven segm ...

Read more

TI Calculator Wireless Chat Using Atmega644

INTRODUCTION: Our project is a wireless communication link which interfaces to the serial ports on the TI-83 and TI-84 calculators. SUMMARY: Our group created a wireless communication system for the widely popular TI 83/84 calculators. The system interfaces to each calculator through their 2.5mm serial ports. Using an instant messaging chat program written in TI Basic, and loaded onto all participating part ...

Read more

PowerBox: The Safe AC Power Meter Using Atmega32

Introduction We designed a device that measures and graphs various aspects of AC power and acts as a computer-controlled remote switch. With the recent push for green energy and environmental friendliness, more and more people are concerned about their personal daily power usage. We developed a microcontroller-based device to measure AC power. The user will be able to insert the device between the wall sock ...

Read more

Networked Biometric Authentication Using Atmega32

Introduction: Due to the increasing need for securing data and places, the biometric authentication industry is seeing large market growth.  We decided to build a scalable, small, and efficient device that can be used to secure doorways throughout a complex.  We use a FingerPrint Cards capacitance based fingerprint scanner as our capturing device.  This data is captured through use of an ATMega32 microcontr ...

Read more

CalcParser Using Atmel Mega32

Introduction CalcParser is a command line calculator. Controlled by a serial connection, CalcParser parses and evaluates an arithmetic expression and has the capabilities to perform symbolic polynomial differentiation with respect to a user-defined variable. It can also evaluate the differentiated expression at a given constant value of the user-defined variable. High Level Design Rationale and sources of p ...

Read more
Scroll to top