Hi
In bad light I misaligned a 12V wire (power supply) on the breadboard which connected it to the Arduino Uno PIN 8 which was set for digital output. The board now does not allow me to upload Sketches to it.
Will a new ATMEGA328 chip repair the damage or are there more components that should be replaced?
I will appreciate your help.
Johan
Yes and no
Will a new ATMEGA328 chip repair the damage
Does your computer still recognise it as a USB device, if so then there is a chance.
If your board is still recognized as a USB board you would need an ATmega chip with a preloaded bootcode or a programming devive or a second Arduiono board to download the bootcode.
ATmega chips are really cheap and I do have two chips preprogrammed with boot code as a precaution measure.
I bought a second Arduino lately. It uses an SMD chip that cannot be replaced. So I always use the good old one, where I can change the chip in the socket.
Yes, Arduino is still recognized, but in brackets (Arduino UNO, but Uncertified).
Bottom right it reports "Arduino UNO on COM 3"
Power ON comes on and the LED between PIN 13 and Gnd is is on. On a new board with no Sketch uploaded this LED flashes about once every second.
Uploading a Sketch causes RX to flash for a short while, but no TX.
The Status bar reaches about 90% green and remains for a long time.
The upload button remains orange and when it turns off it reports "Problem uploading to board"
I hope this will help you to help me.
I once fried a Nano - including the USB, so it was not recognised as a USB device any longer.
However, I was still able to program it using and FTDI programmer.
In theory I could also have used another Arduino as ISP.
In your case, try to re-burn the bootloader using an FTDI programmer or another Arduino.
If that does not get it back to normal, u can always do what I do and just upload sketches with an FTDI programmer.
I borrowed an Atmega328 from a new board and can now upload and flash Pin13, so I trust all is Ok.
Thanks for the help.