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Atmega 328 QFN package


I have some Atmega QFN and TQFP chips lying around for quite a long time. I was pretty eager to use them,but there should be some type of QFP to DIP converter for easy use. I don't posses any SMD soldering equipments, but I was pretty much interested to use the Atmega chips...(Specially the "due" chip.)..few days back I saw some good deals on ebay.COM ,and ordered some of them. With my new and shiney credit card,I went to the checkout and paypal surprised me by saying -We couldn't validate your card, please try another one...WHAT?? I generally use that card on ebay.in (uses paisapay) and I have received goodies without any problems. Sigh!

As I couldn't find any other way to  use those chips in my projects,I started to build my own breakout boards......this is the first one among them, the IC is Atmega328 QFN 32. (That sure is some TINY stuff) ...The process is simple,but takes great concentration........here are some pics...


After making the board,I covered it with hot glue to ensure that the wires remain in their exact places...and using Arduino as ISP,I uploaded the blink sketch,and it worked fine....I blinked all the output pins to see if there was any kind of damage or short,and there was not, So right now I have another Atmega328 Chip in my inventory..............


And if I don't find some breakout for the Due processor(LQFP144) soon,I am gonna make another breakout just like this for the due.........(I Hope my eyes will remain fine)...............

And Oh,I also made my own solder-iron-holder.....sweet.......

Question: QFN is built to make the package smaller, but you are going the opposite way and making it larger...>:(...........

Ans: Instead of throwing these fine MCUs away,at least now I can use them somehow...;P...

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The SchmartBoard is a good product and easy to solder.  They have put on the solder already, all you have to do is put the chip down and push the solder up to the pin with a soldering iron.  Thust me, it is much easier than regular soldering.

I do not know about shipping outside of the USA, but it might make your life easier.


Awesome!!! These pictures reminds me on the times when PCB's was basically not available. everything got wired up with free wires.

I hope that you tested the chip BEFORE you put that hotglue on it? I've got a similar thing by hotglueing some sensors in a case and then had to rip them out because one was broken.

Dipanjan, utter respect, sir.

I've got some breakout boards I want to send you.  Is there a cheap way to send small packages from the US to where you live?

Hope you are well, sir. 

Ever considered a career as a micro surgeon?

I for one salute your patience and soldering skills. You have my respect mate.

You need to buy a QFN socket. I Googled QFN programming socket and found this:


That's a QFN 8 programmer, and this is QFN32....and oh that costs $80 !!!!!!!!!!! I don't think I am going to buy that. And most importantly I have only two of them left. Thanks for the suggestion OB. The main problem was that my debit card is not supported by Paypal,else i would have bought breakout boards from Ebay. Currently i need Some breakout boards for lqfp144 package,which is the "Due" chip. That chip is quite powerful and has some onboard DAC capabilites,so i want to test them out..seems that I am goin to wait for some breakouts to appear in local e-shops.

Yes I know this is not a QFN 32 and that they want too much money but your the guy that can solve a Rubik's cube with some cardboard and a coulple of servos.

My point is you could make a socket and then you won't need to solder all those wires.

I thought about using a breakout board and Z-tape as a programming board.  I'd need to find Z-tape with fine enough pitch to hit QFN.

Can you get PCB's manufactured in india easily? Might be worth designing your own breakouts instead if you cant get any existing ones locally.


Oh, you might want to do some research on whether or not you can program the chip in the due without support hardware. It isnt an AtMega like other arduino boards, its ARM.