31 Mar '12, 11am
Arduino - ArduinoISP
Open the ArduinoISP firmware (in Examples ) to your Arduino board. Note for Arduino 1.0: you need to make one small change to the ArduinoISP code. Find the line in the heartbeat() function that says "delay(40);" and change it to "delay(20);". Select the items in the Tools > Board and Serial Port menus that correspond to the board you are using as the programmer (not the board being programmed). Upload the ArduinoISP sketch. Wire your Arduino board to the target as shown in the diagram below. (Note for the Arduino Uno: you'll need to add a 10 uF capacitor between reset and ground.) Select the item in the Tools > Board menu that corresponds to the board on which you want to burn the bootloader (not the board that you're using as the programmer). See the board descriptions on the environment page for details. Use the Burn Bootloader > Arduino as ISP command.