How to Flash/Re-flash a Bootloader on an Arduino Nano

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How to flash a bootloader onto an Arduino Nano which does not have a bootloader. How to re-flash a corrupt bootloader on an Arduino Nano which will no communicate with programs or the computer.
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While this video didn't solve the root cause of the problem with my Nano's setup directly it did lead to the cause after observation when trying to re-flash the bootloader. The power led was lit then slowly dimmed down. The problem I was having was that I hooked up my Nano with the VIN pin. This was effectively making the Nano try to power other circuitry making it impossible to load code and throwing this error. Once I slapped a diode in there all was right with the world and the Nano was then programmable again. Thanks for taking the time to make this video!

ContentsOfTable
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I had a functioning uno and was able to use it (and your instructions) to fix 2 nanos from china. Now I can run GRBL. Thanks for a great video.

liamstone
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my arduino NANO only works if you select the old bootloader. listening to your instructions was all i did and....BOOM! now my nano can upload sketches without setting it to the old bootloader! expecting more arduino tutorials from you bro! my problem now is how to thank you...couple of beers perhaps?! :)

elsanti
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Thank you very much! It worked! My arduino is now alive!

MisterTrayser
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I can't thank you enough!!! You've no idea how much horseshit I've gone trough before I hit your video!!!! Thank you for sharing!! Best tutorial on bootloader burning!!

MrHristoB
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I had the same problem, but was able to use the Chinese NANO by selecting the "use old bootloader' option when downloading a program. Using the old bootloader uses more memory, (about 1.5 KB more), compared to the new one, but if your program can fit into 30KB or less, there will be absolutely no difference in the

Dennis-mqor
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thank you very much for sharing your knowledge, you saved my nano boards (yup i've bricked two of them and now they are back to live). thanks a lot!

fadeofvoid
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so what you and others are saying is that without a working arduino of some kind you can't update a bootloader on a nano. i have two nano's and must specify Atmega328P (Old Bootloader) in order to upload a sketch. No problem. But when I updated to the library It doesn't work anymore. I get a clean compile followed by a clean upload but the the red light on the nano just flashes very fast. I tried fitting a 3V3 level converter but it made no difference. So I have ordered another more expensive Nano which hopefully will have the new bootloader. Thank you for an excellent video.

johnblack
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it really helped me bring my arduino back to life, thank u

archakbasak
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You are the Best,
i have updated my 5 Chinesse Nano on the New Bootloader without problem. Selecting the (Old Bootloader) is over!

wizzardpascal
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Thanks it really worked, just followed the steps. My led was not blinking as fast before but it still worked

namibianbackyardengineerin
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Thanksss...i tried and revive 14 arduino nano dead and it's worked.

williammunoz
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Does the new arduino ide come with option of old bootloader?

hrudayesh_b_y
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Thank you so much! My Arduino Nano is finally working again.

MrSabifa
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avrdude: Expected signature for ATmega328P is 1E 95 0F
Double check chip, or use -F to override this check.
Error while burning bootloader.

danialahmed
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Thank you, that is very helpful and saves lots of time for research.

djadimyro
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Hello! I have a JGAurora 3D printer with a main board not specified in arduino. It’s called a MPX_PRO_V3. I accidentally flashed the printer and ended up bricking the board, resulting in the two white bars. I did buy a usbasp for the unbricking process, but everything I try fails. How do I burn a bootloader to the board using a usbasp? Or would I have to get an arduino nano? Thanks in advance!

ryrocry
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So that was much more simpel than I thought, thank you ;)

yannikd.
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You deserve more than just my like and subscribe! Thank you so much, all it took was 8 minutes, haha; I wish id seen this video many, many frustrating hours ago!

yaeloosthuizen
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Thank you very much, you saved my board.

marganraj
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