buzzer interfacing with avr primer circuit

A composite stereo signal, as transmitted by FM radio stations, is composed of at least three parts: A base band mono signal, a double sideband channel difference signal, and a pilot carrier. The signal composition is somewhat analogous to an...

dc motor control avr atmega8

A DC motor from an old personal stereo cassette player has been utilized in this circuit, which provides control over both the speed and direction of the motor. The circuit employs PWM waveforms to drive a MOSFET H-bridge, as illustrated...

avr based 8051 microcontroller programmer

This project has been set aside for several years. It was initially intended for programming old 8051 microcontrollers, which have since become obsolete. The project was recently revisited due to the need for a programmer for the Atmel Xmega series....

CodeLock AVR

CodeLock AVR electronic combination lock is realised with Atmel AVR microcontroller AT90S2313 or ATtiny2313. Program in hex code is 2 kB long. User code is consisted of 1 to 4 digits. If you buy the chip than user code is...

AVR Microcontroller Programmer

This resource contains step-by-step information for creating an AVR microcontroller programmer, complete with a suitable circuit diagram. This programmer is capable of programming 8051, AT89XX, AT90XXXX, and 8031 family microcontrollers. The AVR microcontroller programmer described is designed to facilitate the programming...

Serial Programmer for AVR microprocessors

Atmel described a simple programmer based on the AT90S1200 (NOT the AT90S1200A) controller in their application note, AVR910 (a modification to use the AT90S2313 is also given below). The circuit is so small and simple, I was able to put...

avr

Inspired by the work of Nanode and a recent Instructable, an AVR-based Ethernet board has been developed that can be programmed and utilized similarly to an Arduino. This straightforward design is based on the ATMega microcontroller and Microchip's ENC28J60 Ethernet...

Electronic TIC TAC TOE

This project is not to introduce Tic Tac Toe. Everyone knows this game. It is to introduce two features: bi-coloured LEDs, microcontrollers, and the skill of writing an ALGORITHM. You can use the project to learn the skills of creating...

10 or more switches using a microcontroller

There are several methods to read multiple switch inputs using a reduced number of microcontroller unit (MCU) pins. One approach involves using an analog MCU pin to read multiple switches by assigning a unique voltage to each switch through a...