Hi, I am doing a project of a VU meter, consisting of 2 arduino uno's, one for each stereo channels.
I connect 5V power pin from Arduino #1 to %V pin of Arduino #2 and do the same with GND
I ran it off a DC power supply at 7.5 V at 1 Ampre
It was working fine, but recently this morning. I connect the two arduinos as usual, I saw a VU meter's LED light up as usual, but suddenly, I noticed some burning smell from Arduino #1, I immediately unplug the circuit from the board. I touch the Arduino #1 USB controller, It was quite warm to hot so I knew I could blew the chip, but it makes no sense that it'll ruined the second one.
After that, i tried plugging each arduino independently with the laptop. Try to upload blink code, but all i get from these two arduino is
Arduino: 1.6.9 (Windows 10), Board: "Arduino/Genuino Uno"
Sketch uses 1,066 bytes (3%) of program storage space. Maximum is 32,256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2,039 bytes for local variables. Maximum is 2,048 bytes.
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x2e
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x2e
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x2e
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x2e
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x2e
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x2e
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x2e
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x2e
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x2e
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x2e
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
The LED ON does light up on both arduino so i knew the power supply part is ok
the resp code changes with every upload, so i wonder what's going on with the 2 arduinos?
Did i destroyed the Atmega328p chips? or is it the Mega16U2 USB chip?