AVR ATmega Projects Projects

How to use internal ADC of AVR microcontroller using interrupts

Interfacing(USB - RS232 - I2c -ISP) Projects / Ibrar Ayyub

This article is in continuation to AVR interrupts. There are two types of interrupts external and internal in AVR microcontroller. The aforesaid article covers external interrupts. AVR microcontrollers have seventeen internal interrupts. These internal interrupts are generated by the internal peripherals of Microcontroller like Timer, ADC etc. The internal interrupts are used for efficient operation […]

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How to use inbuilt analog comparator of AVR microcontroller

Interfacing(USB - RS232 - I2c -ISP) Projects / Ibrar Ayyub

Analog comparator is a device which compares two input voltages and generates output accordingly. The article on IR sensor explains the use of comparator in sensor designing. Comparators form an integral part of circuit designing in majority of the applications. AVR microcontrollers have in-built analog comparator. Using the in-built analog comparator of AVR, the controller

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How to disable JTAG of AVR microcontroller

Interfacing(USB - RS232 - I2c -ISP) Projects / Ibrar Ayyub

JTAG stands for “Joint Test Action Group” which was standardized as the IEEE 1149.1 Standard Test Access Port and Boundary-Scan Architecture in 1990. JTAG is generally used in IC debugging and device programming. Atmega16 consists of one JTAG port which shares four pins with PORTC. Until JTAG port is not disabled, these pins can’t be used as normal

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How to interface LCD in 4 bit mode with AVR microcontroller

LCD Projects / Ibrar Ayyub

This article explains interfacing of LCD with ATmega16 using 4-bit mode. In this mode only four pins are used for sending data and command instructions. This mode has the advantage over the 8-bit mode as it uses less number of pins. The remaining pins of the controller are available for normal use. The Data or

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SPI (serial peripheral interface) using AVR microcontroller (ATmega16)

Interfacing(USB - RS232 - I2c -ISP) Projects / Ibrar Ayyub

There are different protocols for serial communication between two deceives like, USART, SPI, I2C etc. Before selecting any communication protocol, data transfer rate is an important parameter. SPI transfers data at high speed data. AVR microcontroller contains on chip SPI interface. This article will explore the hardware configuration and programming of SPI. Serial Peripheral Interface

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How to use fast PWM (Pulse Width Modulation) Mode of AVR microcontroller Timer

PWM Projects / Ibrar Ayyub

This article is in continuation of PWM generation using AVR timer. In the previous article, PWM generation using Phase correct PWM mode is described. However, there are some applications like DAC, power regulation and rectification etc. which require high frequency PWM wave. The PWM generation using Fast PWM mode is suitable for such applications. This

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Phase Correct PWM (Pulse Width Modulation) Mode of AVR microcontroller Timer

PWM Projects / Ibrar Ayyub

Pulse Width Modulation is well known technique for controlling power electronics devices like SCR, IGBT etc. PWM is also used in motor speed controlling. Square wave generation by using AVR timers is explained in previous article. The AVR timers have feature of PWM wave generation as well .This article describes PWM generation capability of AVR

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Waveform Generation using AVR Microcontroller (Atmega16) Timers

Interfacing(USB - RS232 - I2c -ISP) Projects / Ibrar Ayyub

At times we come across applications or situations wherein we need to generate square waves with the microcontroller. The square wave can be generated by programming a pin which toggles between 0 and 1 with a certain time delay. Alternatively, the inbuilt feature of AVR timers can be used in square wave generation. The advantage

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Serial communication (USART) with different frame size using AVR microcontroller

LCD Projects / Ibrar Ayyub

The previous article explains serial communication using 8-bit data transfer. AVR microcontroller also supports serial data transfer with frame size of 5, 6, 7 and 9 data bits. The size of data frame can be adjusted according to application. For example, consider a system that needs to transmit only ASCII codes as data. In this

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How to use External (Hardware) Interrupts of AVR Microcontroller (ATmega16)

Interfacing(USB - RS232 - I2c -ISP) Projects / Ibrar Ayyub

This article introduces the concept of interrupts and the different types of interrupts in AVR Microcontroller (ATmega16). Interrupt as the name suggests, interrupts the current routine of the microcontroller. Microcontroller executes instructions in a sequence as per the programs. Sometimes there may be a need of handling planned and higher priority events instantaneously that might

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