Connect/Run Arduino uno r3 whit ATMEGA8A-PU from ebay.com (doflye.net) version

http://1.bp.blogspot.com/-uEBBarleGr0/UtawoxymBmI/AAAAAAAAEvs/or0GsXbma7Q/s1600/19091-1-digitalzone88.jpg

After 2 days i finally have successfully run this uno r3 whit old atmega8 chip, just follow this guide:

1. Get an Arduino board and USB cable2. Download the Arduino environment

- (windows) from www.arduino.cc- (linux ubuntu) in Software Center or from www.arduino.cc

3. Connect the board4. Install the drivers for UNO, you can find more info on google or arduino web site

- (linux ubuntu 12.10+)sudo apt-get update && sudo apt-get install arduino arduino-core

- (windows) arduino web site5.1 Open file boards.txt

- (windows) C:/Program Files/arduino/hardware/arduino/boards.txt- (linux) usr/share/arduino/hardware/arduino/boards.txt

- - (ubuntu) type "gksudo nautilus" or "gksudo gedit" in terminal to open protected file5.2 Insert code below AT THE END of boards.txt and save it.

6. Launch the Arduino application7. Open the blink example

- (File>Examples>Basic>Blink)7. Select your board "Arduino Optiboot8"

- (Tools>Board>Arduino Optiboot8)8. Select your serial port. If there is no USB option on serial port or serial port is not available,

you have problem whit driver.- (Tools>Serial Port>USB)

9. Upload the program

Tested on Windows 7 and Ubuntu 13.10. This code was found inhttp://www.doflye.net forum whit the BIG help of "google translate" :)

############################################################### Custom board "Arduino Optiboot8"

# Arduino uno r3 ATMEGA8A-PU

opti8.name = Arduino Optiboot8

opti8.upload.protocol = Arduinoopti8.upload.maximum_size = 7680

opti8.upload.speed = 115200

opti8.bootloader.low_fuses = 0xBFopti8.bootloader.high_fuses = 0xcc

opti8.bootloader.path = optibootopti8.bootloader.file = optiboot_atmega8.hex

opti8.bootloader.unlock_bits = 0x3Fopti8.bootloader.lock_bits = 0x0F

opti8.build.mcu = atmega8opti8.build.f_cpu = 16000000L

opti8.build.core = arduinoopti8.build.variant = standard