How to burn boot loader of arduino uno r3 usin aurdino mega 2650

Development Tools IDE 1.x
3

For Arduino IDE earlier than version 1.6.6:

After opening File->Examples->ArduinoISP, before uploading to the programmer board edit the line:

#define RESET     SS

Change it to:

#define RESET     10

For all Arduino IDE versions:

The 10uF cap is not needed when using Leonardo-type ATmega32U4-based boards as a programmer, because they don't reset upon serial connection.