MicroDev128

PCB Routing Pt3

Finally Finished Routing the project!!!!!!

Took a while but I ended up using layer 3 as a mixed power and signal plane insteed of a solid power plane. I am happy with how it turned out. I still might add TX and RX lines to the UPDI header, so you can do serial print.
Overall very happy. Now I have to finish the silkscreen labels, do the documentation :/ , and test it (yay).

PCB Routing
MicroDev128-32

Started routing everything for the whole board. I am sick of routing a good seeming line and then ripping it up 20 times.

• Started on the power lines
• Made planes for the GND and 5v lines
• Learnt that I really suck at PCB design in general

________________________________________________________________Project Overview

Based on the AVR128DB32, with the LT8653S switching power regulator. It has:

• Up to 2 amps on both the 3.3v and 5v lines.
• 128kB Flash and 16kB SRAM
• MVIO on 4-pins with 3.3v, 5v and EXTERNAL source presets
• UPDI Programing
• Arduino Nano sized footprint
• Aims to have a better price to performance ratio than
  Arduino (not hard considering a Genuine Uno is $40 NZD (About 20 USD)

More to come as I hopfully soon finish this project!

PCB PT2

This time:
I have changed the voltage regulator to be the LT8653S (smaller footprint)
I have relaid the board (again)
I have started routing some basic data lines and the crystal.
I have updated all footprints

More to go!
Getting there

Schematic Finishing and PCB (PT1)

Schematic PT2

Schematic AND ideas

Schematic Work and Pondering

Hardware figuring out

Block Diagram

A basic program “BLINK” for the bare chip I have.