Hello! I'm studying electronic and I tried to make H-bridge motor drive circuit for experience.
but I got a problem.
I am not an expert in this field and I am learning.
I ordered PCB board twice because of this problem.
Right after I connected the board with STK500 and laptop through the ISP terminal,
Atmega128 chip is suddenly burned !
I don't know the exact location where is burning exactly.
I guess VCC and AREF is burned.
you can see the picture.
On PCB picture, the thick white line is +5V Power, it 's from 7805.
I don't know why this hardware problem is happening.
Please help me. Thank you all!