Picture of Bootload an ATmega328

This instructable adds to any of the Arduino on a Breadboard instructables. I wrote my own breadboard-Arduino tutorial, and then I found that I was struggling to program some of the boards I made. A lot of research and dead-ends got me understanding that:

1. You either need a microcontroller with a pre-loaded Bootloader, or must load your own
2. Not all ATmega328’s are equal

(A bootloader, very simply, is a programme that sits on the chip and manages the upload of your sketches onto the chip)

There are plenty of bootloading resources, but I couldn’t find a single one that pulled everything together in a way that made sense to me.

If this instructable helped you, please visit Crash Bang Prototyping, follow us on twitter, and join in with our prototyping resources and tools.

Here goes…

Step 1: Parts

1 x Arduino on a Breadboard
1 x Arduino UNO
Connecting Wires
Arduino IDE installed on your PC

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Thanks a lot

gewkwn1 year ago

thanks for info !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


AndyTallack (author)  kylebarker821 year ago
Great stuff - thanks for letting me know! Would love it if you followed Crash-Bang on Twitter as a thanks :)
Thanks for this. Helped me save a wasted ATmega328
AndyTallack (author)  Antzy Carmasaic1 year ago
Excellent, pleased it helped! Thanks for letting me know.
NeilH56 days ago

Thank you. It works

ksnanda2 months ago

I have an atmega328p MLF package type that's mounted on a pcb with crystal (SMD Type) and other few components.

How to upload code to this ?
AndyTallack (author)  ksnanda2 months ago


It may have an ISP header? Can you send a link to the product you have?



bpatil653 months ago

my softwear are not working

subhro.j.bose3 months ago

I can't save F0. it is showing this error message. now what to do? please help........

AndyTallack (author)  subhro.j.bose3 months ago

Wow - that's an error I've never seen before. Can you give me more info on what you were doing when it happened? Looks like some kind of security rights issue.

actually I have done all the job but it is showing the same problem.Nothing new is showing. And inside the "etc" folder there already have “0x1e 0x95 0x14” sooooooo what to do now ?

mdeudon3 months ago

The bootload of my arduino has been corrupted. Through this tutorial I've fixed it, especially with the STEP6.

Thank you so much for sharing your experience


AndyTallack (author)  mdeudon3 months ago

Awesome - thanks for letting me know - really pleased it helped

JPS28 months ago

Perhaps a better, more permanent solution: if you buy a lot of these chips is to edit avrdude.conf and add the following below the part parent "m328" section:

part parent "m328" id = "m328pu"; desc = "ATmega328PU"; signature = 0x1e 0x95 0x14; ocdrev = 1;

This should permanently add the 328PU to your supported parts for avrdude.

pchretien JPS24 months ago

Hi JPS2 ... I would prefer this permanent solution but I have not been able to make it work. I get a "syntax error" at the line I have the "part parent" instruction. Any suggestion?

AndyTallack (author)  JPS27 months ago

Thanks for the suggestion. When I originally wrote this, the GCC toolchain didn't support the m328, so while AVRDude would upload ok, the sketch wouldn't compile. I understand this has changed with the latest releases of GCC - I need to test it out and amend the Instructable as soon as I have a chance.

Thanks for the post.

malvai5 months ago

thanks a lot!

Jonoi.Ramsay5 months ago

I have the ATmega328 with Arduino Bootloader (http://tinyurl.com/o4n9cxe). I do not have the 16MHz crystal and so im using the minimun circuit wiring setup to upload sketches (http://arduino.cc/en/Tutorial/ArduinoToBreadboard). but it does not work when i try to upload on a breadboard.

AndyTallack (author)  Jonoi.Ramsay5 months ago

It's likely that the ATmega you bought is configured to work with a crystal. ATmegas have "fuses" that can be set to configure where the system clock is sourced from. It's likely that the one you bought has the fuses set for an external 16MHz crystal, as that's what teh Arduino uses. If you have an Arduino UNO, try switching the new microcontroller out for the existing one.

kamalpancholi6 months ago

Hey thanks man... This is a great help to me. I had an ATMEGA 328-PU and I was in problem of burning bootloader. This is working. Thanks a lot....

AndyTallack (author)  kamalpancholi6 months ago

Excellent! Pleased it helped and salvaged your 328-PU chips!

kamalpancholi6 months ago
danis.dan.56 months ago

1) Uploading sketches in such a way (with the bootloading way) does mean that the bootloader will be erased after uploading a sketch, doesn't it? We just do that for fuses etc?? Could we upload a sketch without before burning the bootloader on our (breadboard) chip?

2) Using FTDI u mean w remove the chip from the Arduino Uno and programming via Rx and Tx pins, remaining/leaving the same "Arduino on a breadboard" circuit as it is?

gLorieul7 months ago

@AndyTallack just to say that on linux, the "avrdude.conf" file is located in "/etc/avrdude.conf" (at least that is the case for linux mint 17 "Qiana"). You might want to add this information to your tutorial ; I am sure linux users would appreciate that.
Everything else works as expected.
Thanks for the tutorial !
G. Lorieul

AndyTallack (author)  gLorieul7 months ago

Great, thanks - will include when I get a gap.

Thanks for the info!

saikat199 months ago
It didn't worked fr me I''m using atmega 328-pu
AndyTallack (author)  saikat199 months ago
Sorry to hear that - can you give me more info?
saikat199 months ago
It didn't worked fr me I''m using atmega 328-pu
MarkF79 months ago

If swapping back and forth gets annoying then you can just copy the entire section to a new one, give it an id of "m328pu" and a description of "ATMEGA328PU" with the appropriate fuse values. You can then edit your Arduino IDE "boards.txt" file and create a new board based on the Uno one with the mcu set to "atmega328pu". You'll then be able to select that device in your IDE Board list in addition to the regular Uno board.

AndyTallack (author)  MarkF79 months ago
Thanks Mark. I had tried that originally, but the GCC toolchain (as I understood) didn't support it. What version of the IDE are you using? I believe the new GCC toolchain now supports but haven't had a chance to test yet.
mbose210 months ago

Plz help me Sir, I have modified the conf file. But now on hitting arduinoisp, it says 'Expected signature for ATMEGA328P is 1E 95 14'.

AndyTallack (author)  mbose210 months ago

Does it tell you what the actual signature is?

Are you sure it is an ATmega328?
mbose2 AndyTallack10 months ago

Thank you so much for replying Sir. That was my mistake. I'm now using IDE1.0.1(1.0.6 previously). The error now is unrecognized character : "P"

3suresh10 months ago

i made iiiiiiiittttttttttttttttt

mbose2 3suresh10 months ago

I get error message saying expected signature for ATMEGA328P is 1E 95 14, even after modifying the conf file. Do you know the solution Sir?

novianwf10 months ago

thanks a lot i want to try this

ShajeehM10 months ago

i m getting this error avrdude: stk500_getsync(): not in sync: resp=0x00 while burning the bootloader to atmega 8L-8pu can any one tell me how to burn bootloader to this chip

AndyTallack (author)  ShajeehM10 months ago

Sorry I don't have an ATmega8 to test this on, but should work - see the comments below on possible way to do this.

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