Hi, I fried the ATmega328 chip on my Arduino BT board by applying 11V to it. I soldered the power cable to the wrong side of a volt reducer and didn't check the results with the multimeter before attaching the arduino. I don't recommend this to anyone I can't upload anything anymore (it logs "programmer not responding") and if I apply a led to output 13 it doesn't blink at boot so I guess I broke it. I tried to upload a new bootloader too, but it won't let me (it logs "programmer not responding"). Strangely though the bluetooth modem is still active, I can connect to the device and write characters on the serial port.
Is it really broken? Or can I patch it somehow?
Did anybody manage to use the bluetooth modem of a broken arduino BT anyway? I know the bootloader does some initialization of the modem at boot time which would be missing now.
Thanks, replacing the atmega is going to be difficult since the arduino BT mounts a very small atmega chip soldered directly to the board, not mounted on a socket. I will try to connect the BT modem to another arduino though. It would be great if somebody can suggest me the best approach or point me to a datasheet of the BT modem.
just cut off the fryed atmega clear the pads and solder new chip with fine tip soldering iron. it is not difficult at all! trust me! (in case of to much solder use copper solder wick)
I can't upload anything anymore (it logs "programmer not responding") and if I apply a led to output 13 it doesn't blink at boot so I guess I broke it. I tried to upload a new bootloader too, but it won't let me (it logs "programmer not responding"). Strangely though the bluetooth modem is still active, I can connect to the device and write characters on the serial port.