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The circuit is able to burn a firmware into the microcontroller and uses only a 74HC00 (or 74HC132) and a couple of transistors to operate; it connects to the PC via RS232 native port or USB to RS232 interface. The control program, written in VB6, is fully available, in executable or source code form (easy to modify for implementing other micros). The circuit printed board layout in PDF 1:1 format and the electric schematic are also downloadable from the site below:
Simple Atmel AVR ATtiny2313 programmer with 74HC00 - [Link]
Have you programmed the wrong fuses and now you can’t access your AVR? No problem there is a solution out there. All you need is a high voltage programmer to reset fuses. This board called “Fuse doctor” can reset your fuses. Programmer supports ATTiny2313, ATmega8, ATmega16/32 and others. One great feature is that it doesn’t need computer to operate. [via]
Wrong AVR fuses? Correct them using fuse doctor - [Link]
These tiny controller boards are build to provide a quick start for projects with 8 and 20 pin AVR microcontrollers, e.g. ATtiny13, ATtiny45, ATtiny85 and ATtiny2313. They don’t include any fancy stuff, they are just as simple as possible. Eagle schematics are included.
ATtiny breadboard headers - [Link]
Emilio Ficara writes:
The circuit is based on low-cost AtTiny2313 ATMEL microcontroller. It is able to read 125KHz RFID tags. Every tag is read then decoded, and its code is transmitted as ascii chars on the serial output. If the RFID code read is the same that is recorded in the micro non-volatile memory, then a relay pulses for 1,5 seconds, acting as electronic lock. The code stored in non-volatile memory is taken from the FIRST tag that is read from the circuit after burning the micro. The downloadable zip file contains the schematic diagram, the printed circuit board layout (single face, PDF 1:1 format) and the object file to burn in the micro. The circuit was published by me on italian magazine “CQ Elettronica” in the May 2009 issue, but the zip file can be freely downloaded from my site.
Generic 125KHz RFID tag reader and electronic - [Link]
Emilio Ficara writes:
I have done a simple infrared remote control receiver with RS232 ascii output. It can be used for developing remote controls on a PC using the serial port. In practice, the infrared bursts are converted in ascii characters and sent to the RS232 port. The downloadable ZIP file contains the schematic diagram, the printed circuit board, the components disposition and the object file to write into the ATMEL ATtiny2313 microcontroller.
General purpose infrared remote control receiver with RS232 output - [Link]
This simple design uses the 20 pin ATTiny2313 microcontroller to measure frequencies from 1Hz to over 2MHz. The frequency is displayed on a standard HD44780 16×2 LCD. A bright white text, blue backlit LCD is included with the kit. The device requires a regulated 5V power supply. [via]
FunCount Frequency Counter – [Link]
Let’s start this with a series of projects based on AVR microcontrollers. The first is a “Scroll” leds of 7×5 pixels which includes an application for visual design and animation signs.
Scroller 7×5 LEDs based on micro Attiny2313 - [Link]
CodeLock is an AVR based electronic combination lock it is realised with Atmel AVR microcontroller AT90S2313 or ATtiny2313.This project used for access control. 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 consisted of 1 to 8 digits. If the code is entered in the correct sequence, then after 1 second the relay and the electric striker (in the door) switch on for 1 second and then switch off again. User code can be changed via 3×4 matrix keypad. [via]
AVR tiny code lock - [Link]
This small AVR circuit generates digital time signal that can be displayed on dual channel oscilloscope screen.
Digital clock circuit is based on AVR Attiny2313 microcontroller clocked at 4Mhz. Oscilloscope pattern is generated by using four microcontroller pins as DAC output. All project files are available for download from author site. [via]
AVR digital clock on oscilloscope screen - [Link]
