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 8 digits. If you buy the chip than you can enter up to 8 user codes. If the code is entered in the correct sequence, then [...]

How does it work? The triac TIC206D (BT136-600D) needs only a small current flowing through the gate to start conducting and turn a light on. This is the reason why they can be directly connected to the microprocessor, which can sink at least 10mA. Most digital circuits can sink much more current then they can [...]

In this microcontroller project, Guido Socher design a state of the art USB programmer for the AVR microcontrollers from Atmel. You can build it from scratch without the need of another programmer to load the initial firmware.The firmware is open source and programmed in C according to the AVR068 specification from Atmel. Source: tuxgraphics

This is a mini inexpensive AVR Digital Voltmeter Project with three digit display. It can be freely programmed, calibrated and even be programmed with a non linear formula. It’s a display where you can define the relation between the measured value and the displayed number. Download: Software, documents and future updates Source: Tuxgraphics

Source: SiliconChip

Source: Rototron

Parts List: Description QTY Atmel ATMEGA8-16PI 1 74HC126N Quad Buffer 1 12 MHz Crystal HC49/US 1 28 pin IC socket 1 14 pin IC socket (optional) 1 Resistor Carbon Film 68 Ohm 1/4 Watt 10% 2 Resistor Carbon Film 270 Ohm 1/4 Watt 10% 1 Resistor Carbon Film 1K Ohm 1/4 Watt 10% 2 Resistor [...]

The ATir is an interface device to emulate the function of a PC “AT” keyboard and controlled with an infarred (IR) remote control using an “AT”tiny45 microcontroller. The device hardware is composed of an Atmel™, ATiny45 microcontroller, a Sharp™ infrared receiver / demodulator and a few discreet components consisting of low pass filter components and [...]

It was designed for AT90S1200 and AT90S2313 but as I studied a little it is also compatible with the newer version of 90S2313 which is Tiny2313. Download Software for this programmer – AVReal Source: Trimbitas Sorin

This article shows how to build a small simple AVR frequency meter. The project is build on a veroboard, using only 3 components and 8 resistors. It is designed to be plugged into any standard bread-board. The design is built on a ATMEGA16 micro controller. There are no crystal oscillators, as we are using the [...]

It’s based on an AT90S2313 and a Dallas DS1621 Digital Thermometer. The temperature is displayed on a dual 7-segment display, and two buttons are used for setting parameters. A high current relay switches the heating element. I used an AVR 2313 as it just the right number of pins for this task. Also, it’s programmable [...]