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4X4 Keypad Interfacing with ATmega32 and LED Display

Keypads are parts of HMI or Human Machine Interface and play really important role in a small embedded system where human interaction or human input is needed. Matrix keypads are well known for their simple architecture and ease of interfacing. In this project, we will learn How to interface a 4X4 keypad with AVR ATmega32 microcontroller. Here, we will display the value of the pressed key in a 1X8 LED array ...

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4X4 Keypad based Password with ATmega16 and LED Display

Security is a prime concern in our day-today life. Everyone wants to be as much secured as possible. Keypad based password is one of the many method and the most common and easy one to provide security to any system. In this project, we will learn How to design a password protected system using a 4X4 keypad with AVR ATmega16 microcontroller. Here, the user will enter a 4 digit numeric password to gain acces ...

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LM35 Temperature Sensor Interfacing with ATmega32 and LED Display

LM35 series is a low cost and precision Integrated Circuit Temperature Sensor whose output voltage is proportional to Centigrade temperature scale. Thus LM35 has an advantage over other temperature sensors calibrated in Kelvin as the users don’t require subtraction of large constant voltage to obtain the required Centigrade temperature. It doesn’t requires any external calibration. It is produced by Nationa ...

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A led matrix Mask built on AVR ATmega8

AVR Mask1 is a led mask built around 74hc595 shift register and 8x8 led matrix. The "Dylan Dog" comics decoupage, in conjunction with his stands, make it good looking.t has 4 8x8 led matrix, 2 for the mouth, and 2 for eyes. When the user get closer to the mask, the IR sensor placed on the back activate the mask. If activated, it randomly runs eye and mouth patterns. Patterns can be programmed in code, the p ...

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Power LED Dimmer using ATmega32 Microcontroller

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. [caption id="attachment_34927" align="aligncenter" width="600"] 1 Watt LED Dimmer using ATmega32 Microcontroller[/caption] Now if the ...

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0-99 Counter using AVR Microcontroller

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 seven illuminating segments. Each of these segments has an LED (Light Emitting ...

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Joystick Interfacing with AVR Microcontroller

In this tutorial we are going to interface a joystick module with atmega8 microcontroller. A JOY STICK is an input module used for communication. It basically makes easy the user machine communication. A joystick is shown in below figure. [caption id="attachment_34858" align="aligncenter" width="600"] Joystick Interfacing with AVR Microcontroller[/caption] The joystick module has two axis - one is horizonta ...

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