I have Arduino UNO and made some experiments on it. At one point, when trying to upload it started to give me this error:
avrdude: stk500_getsync(): not in sync: resp=0x00
Then I checked and changed everything many times - port, driver all that I found on the forums which could rise this error. Then found that the bootloader could have stopped working. Bought another usb avr programmer and tried to connect to arduino and upload the optiboot_atmega328.hex with avrdude. Avrdude was rising the error:
avrdude: initialization failed, rc=-1
Double check connections and try again, or use -F to override
this check.
all the time. Then I took off atMega328 chip from arduino and after some tries with crystals, baudrate and stuff, finally managed to upload the bootloader on the chip. When however put atmega328 back to arduino, there is no behaviour change - the little "ON" and "L" diodes are on, and there is no any blinking, even when I press "reset".
What should I do now or it is already dead?
Any help will be appreciated.
well it seems your atmega is death as you reprogrammed it already with the boatloader and still doesn't respond,
what you can try is programm a blink program in it (not a arduino sketch) with avr dude and a programmer (or a arduino as ISP)
if that works and it blinks then we know the chip isn't death and to look for the problem somewhere else
No, I think it is not dead. I could upload and download code to it and yes - i uploaded a simple blink program to the atMega chip and it works. Also i had another clean atMega328 chip and when I replaced the default one arduino was the same with just "ON" and "L" diodes shining continuous.
As for the experiments - I was experimenting with a simple circuit for voltage peak detection.