I have a project made with Arduino, and I want to replace it by a miniaturized circuit with just a microcontroller. Is there any tutorial that can guide me in doing this? Any reference is wellcome. Thank you!
You can use an Arduino on a breadboard to get you going. From the breadboard, you can then develop a circuit on a pre-made PCB like this:
Then to a custom PCB, if you so desire.
The main question is: Which features do you want to have on your board?
You can start off with the design files of the Arduino board you are using: update what you need (and don't need).
Then, for the manufacturing itself, several approaches will work:
- veroboard & through hole components. Not very practical, not small, but easy;
- DIY manufacturing: toner transfer method, or if you have a CNC, isolation milling;
- Boardhouse (e.g. PCB manufacturer) to whom you send your finished design to have it manufactured.
An alternative would be to use a smaller board, like an Arduino nano: it all depends on what your constraints/goals are.