First hi to everybody. This is not my first post here but the last one was a long time ago..
I'm prototyping a MIDI Controller using an atmega32 @16Mhz. Today I was testing some of the funcs and suddenly everything stopped working. The first thing to notice was a voltage drop on the overall circuit (using LM7805 to power the micro and other devices with 5V).
Later I found a short circuit.... it was *inside* the atmega32, between VCC and GND pins (10 and 11 in DIP40 package).
Sounds too strange to me.. I took the avr out and measured DC resistance with an ohmmeter to find 2 ohms!! (between VCC and GND in atmega32)
clearly, that's the thing.. Once I took it out voltage got back to 5V.
I'm currently checking for short circuits but I have a question: has anyone experienced this thing?? when?
I thought I might get an open circuit when something gets burned, but not a short one!
thanks to everyone in advance