Devlog #1

Finished Schematic

What is MyTtiny?

MyTtiny is my own development board based on the ATtiny3217.

Here are some of its features:

• USB-C — The board will have USB-C for easy programming, communication, and other things. (USB-C is just good :3)
• UART — It will also have a CH340N chip for UART communication and programming.
• Pin headers — One of the most basic features: GPIO pins for connecting your own components and modules.
• SD card — On the bottom side of the board, there will be space for an SD card module for storage. You don’t have to use it, but if you connect an SD card, 4 GPIO pins will be unavailable.
• NeoPixel LED — A built-in NeoPixel RGB LED that can light up in basically any color.
• Compact size — I want to make the board as small as possible so it can easily be used in my projects.
• Easy programming — I also added a DPI programming header, so the bootloader can be flashed and the board can then be programmed through UART using the Arduino IDE.

What have I made so far?

For now, I have finished the first schematic.

I’m not the best at designing PCBs yet, but I already have some experience with schematics and electronics, so I used some connections from my previous projects as a reference.

I also tried to make the schematic clean and easy to understand, so both you and I can work with it more easily.

What do I want to do next?

This is only the first part, and there is still a lot of work to do.

Here are the things I want to do next:

1. PCB design
   Right now, I only have the schematic, so the next step is to turn it into an actual PCB. :)

2. Final inspection
   After finishing the PCB, I need to inspect everything carefully and fix any bugs I find. Of course, the best inspection will probably happen after I physically receive the board.

3. Documentation
   Since this project is open-source, I want to make good documentation so other people can understand the board and use it in their own projects.

4. Ask for a grant
   Thanks to Stardance (thank you, Stardance <3), I want to apply for funding so I can get the board manufactured.

5. Manufacturing
   I want to have the PCB manufactured by JLCPCB and have it assembled as well, because some of the components are really small and I don’t want to suffer while soldering them.

6. Try to make it work
   Once I receive the boards, I want to flash the first one, test everything, and hopefully… make it work. :)

And while I’m doing all of this, I’m going to post these devlogs so you can stay tuned!

So I think that’s everything for this Devlog.

You can write your questions or ideas in the comments — I’m going to read everything!

See you in the next Devlog!

Love u :3

Below you can see the schematic of the board.