Asishjohney

Hai, we tried to do a proof of concept of your circuit. Soldered as per your circuit and tried to flash the bootloader. It is detecting the chip when I tried to flash the chip, Atmega 2560 got fried (After a 10 seconds) and the VCC and GND of the chip got shorted. It happend 2 times for me, the 5V voltage is from the Ardunino 5V regulator. PLz help me to solve the problem.

Have you did hardware test?

The PCB files are there in the rar file, plz check it

Bc12 represents a ferrite bead. U can use an inductor of 100uH.

check mainly the VPPU and VDDU transistor connections. Carefully check the BC547 and BC557 transistors and its terminals.

Did u do step 3 which is HID detection?What is the voltage getting at VDDU and VPPU??

Did u do step 3 which is HID detection?What is the voltage getting at VDDU and VPPU??

Yeah, u can program the PIC18F2550 using arduino,But I am not yet tried yet. try this tutorial : https://sites.google.com/site/thehighspark/arduino-pic18f

You can try to program PIC18F2550 using arduino from this tutorial, I am not tried yet. Comment me if it is working.https://sites.google.com/site/thehighspark/arduino-pic18f