In this project we are going to use one of the features of ATmega32A to adjust the brightness of 1Watt LED. The method that is used to adjust the speed of LED is PWM (Pulse Width Modulation). The method of PWM is explained here. Consider a simple circuit as shown in figure. Now if the […]
Power LED Dimmer using ATmega32 Microcontroller Read More »
We all know that one of the places where power wastage happens most in homes and offices is at staircases. We usually turn on light at stairs and leave it in a hurry. In this project we are going to design a stair case lamp which works on battery and only turn on the lights only
Automatic Staircase Light Read More »
Whenever we go to vote for elections we come to see electronic voting machines. In this project we are going to design and develop a simple voting machine by using ATmega32A microcontroller. Although we can use the controller to get more than 32 people voting machine, to keep everything simple we are going to make a voting
Microcontroller Based Electronic Voting Machine Read More »
We know in offices, shopping malls and in many other places where only the person with authorization card is allowed to enter the room. These systems use RFID communication system. RFID is used in shopping malls to stop theft as the products are tagged with RFID chip and when a person leaves the building with the RFID
RFID Based Toll Plaza System Read More »
In this tutorial we are going to design a 0-99 counter by interfacing two seven segment displays to ATMEGA32A Microcontroller. Here we count events based on number of times button is pressed. Before moving ahead, let’s understand what is a seven segment display. A seven segment display got its name from the very fact that it has
0-99 Counter using AVR Microcontroller Read More »
In this project we are going to design a circuit for measuring temperature. This circuit is developed using “LM35”, a linear voltage sensor. Temperature is usually measured in “Centigrade” or “Faraheite”. “LM35” sensor provides output based on scale of centigrade. LM35 is three pin transistor like device. It has VCC, GND and OUTPUT. This sensor
Temperature Measurement using LM35 and AVR Microcontroller Read More »
We know in offices, shopping malls and in many other places where only the person with authorization card is allowed to enter the room. These systems use RFID communication system. RFID is used in shopping malls to stop theft as the products are tagged with RFID chip and when a person leaves the building with the RFID
RFID Based Voting Machine Read More »
In this project we are going to design a 25V range digital voltmeter by using ATMEGA32A microcontroller. In ATMEGA, we are going to use 10bit ADC (Analog to Digital Converter) to build a digital voltmeter. Now the ADC in ATMEGA can not take a input more than +5V, so for getting a higher range we
0-25V Digital Voltmeter using AVR Microcontroller Read More »
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. We know that sound vibrations can not penetrate
Distance Measurement using HC-SR04 and AVR Microcontroller Read More »
In this tutorial we are going to interface a 4×2 (8 key) touch keypad with ATMEGA32A microcontroller. We all know keypad is one of the most important input devices used in electronics engineering. This module does not have actual keys, but have specially designed capacitive metal pads, and these pads are very sensitive. So when a person
Touch Keypad Interfacing with ATmega32 Microcontroller Read More »
