Small, with eight legs and works like an Arduino - what is it?

In our time, electronics continues to decrease in size. The same usable volume accommodates more and more components, which leads to greater efficiency, speed and productivity of the equipment. The miniaturization process is promoted not only by large technology companies, but also by ordinary users, electronic engineers - enthusiasts.

One of them is currently working on the DIL-Duino project, a miniature version of the Arduino. The system is more similar in form factor to the microcircuit than to the “adult” Arduino board. The development is based on ATtiny85, a motherboard with an area of ​​only 75 mm2 (the dimensions of the board are smaller than 8 * 10 mm).


Comparison of the most famous versions of mini-Arduino with the current project. Even with USB, DIL-Duino is smaller than the rest of the boards.
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If you add a USB-port, then all the same, the total area of ​​the system will be about 144 mm2. The main module includes QFN CPU, and for installation there are the necessary holes. It is made of a slightly larger board with perimeter holes, and then cropped.

DIL-Duino uses the QFN Version ATtiny85 version, as already mentioned, plus a USB Bootloader to ensure easy use of the Arduino stack in the DIL-8 form factor.



Programmable chip using Arduino Leonardo.



This is how the board itself looks, increased several times.





But the layout of the board:





The project, in principle, is almost completed, but the author is still working on optimizing his mini-Arduino. You can follow the updates on the project page here . The author will post the software for DIL-Duino a bit later, but if there is a desire, you can try to get the board on your own.