Most of you here must have tried to find the effective way to burn the bootloader without external AVR-Writer, but have you found it yet?

Well, if you haven’t got what you’re searching, then today’s is you lucky day, as this project is the thing that you’ve scouring for. Normally, when you’re trying to burn the bootloader of Arduino Diecimila, you have to connect external AVR-Writer to ICSP of Diecimila and it’s totally a troublesome procedure.

By using this incredible method, you can easily burn the bootloader by Diecimila itself without external AVR-Writer and causing any troubles to you! For this project, you will need a FT232RL BitBang Mode AVR-Writer, where it’s an USB-Serial bridge on an Arduino Diecimila PCB. It has a function to manipulate each signal pin directly and it’s called BitBang Mode.

First and foremost, you need to modify the Diecimila. There are four pads written as X3 near FY232RL on a Diecimila PCB and these pads are connected to the control pins of FT232RL. After it, remove the solder of these pads and insert a pin-header. Lastly, it’s time to give it a last soldering and you’re done with it!

With a slightly modification, you now can burn the bootloader without external AVR-Writer!