AVR dragon Connection-Power supply

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Hello all,


I am kind of new member.... feeling great being a part of such creative forum..


So here is my question


I am trying to test my AVR dragon using LED blinking, my circuit is as below,


1) AVR -> Atmega328P <- AVR supply ,

All works fine, I am able to enter into the download mode. ( Tools ->  Device Programming )



2) AVR -> Atmega328P <- Power supply ( ATX Cabinate supply of my old PC ).

when  I am trying to enter into the download mode. It gives error when reading the device ID. I think it is because of the floating ground of the different supply. I have short circuit all the grounds.


My question is how to correct it ???.... Kindly help me to resolve the problem.



Goswami Sourabh,

The Creator....