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atmega32u4 schematic and layout feedback

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lookaflyingdonkey

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Hi Everyone,

Just wondering if I could get some feedback on a project I am working on.

I am building a small arudino based board with the atmega32u4 at the heart, The attached brd and sch files are my first step of getting the basic platform done and then I will customise for each specific task.

This is the start of a couple of different nodes that I will be developing but I want to make sure that the core controller design is solid.

If I could get any tips or feedback on the schematic (including component choice) and the overall board layout that would be great.

Cheers,
Dean
 

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  • sch.pdf
    161.6 KB · Views: 53
  • brd.png
    brd.png
    46.2 KB · Views: 62

First of all In my view....you need to fix the spec ....that what is the frequency of operation ( Clock speed) then power rating of device then only you can start the design that will work for your functionality.....I had seen the layout picture that you are attached ...but it is always the safe practice to keep the pin names on the layout i.e. silk screen bcz that will make people clear about the pin sequence .... Now in the layout it will be guess work for most of the people ....

Good Luck
 

All the capacitors around the mcu are not connected in one end (C3,C4,C5,C6)
 

Thanks for the feedback, I did have pin numbers but it is quite small so it was just a mess.

For context it is running at 16mhz and 5v and nothing too intensive (ie IR, led control, push button input, etc).

With the pins for the mcu the notch is on the right point. Any suggestions with the component choice? Am I missing anything obvious or things in the wrong spot?

Cheers
Dean

- - - Updated - - -

All the capacitors around the mcu are not connected in one end (C3,C4,C5,C6)

Oops, I forgot to clarify that one, there is a GND plane that I have turned off for visual clarity. All of the GND pins connect directly to that plane

Cheers
 

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