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Documents Why You Need a Raspberry Pi Pico Development Board by Shabaz - Workbench Wednesdays 70
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  • Author Author: tariq.ahmad
  • Date Created: 16 Mar 2023 5:48 PM Date Created
  • Last Updated Last Updated: 29 Mar 2023 7:24 AM
  • Views 25756 views
  • Likes 7 likes
  • Comments 13 comments
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Why You Need a Raspberry Pi Pico Development Board by Shabaz - Workbench Wednesdays 70

Development boards for microcontrollers speed up prototyping. They collect all of the bits you normally need into a single place. The Pico Eurocard was designed by element14 Community member shabaz–and it is awesome! James walks through the major features, talks about what he likes, and shows why you want to use one.

Watch the Video:

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Bonus Content:

  • Pi Pico Eurocard Blog Post
  • GitHub Design Files: https://github.com/shabaz123/pico-eurocard
  • OpenOCD:  https://openocd.org
  • Thanks shabaz  !

Bill of Material:

Product Name Manufacturer Quantity Buy Kit
DC-DC CONVERTER, 3.3V, 0.5A Multicomp Pro 1 Buy Now
DC-DC CONVERTER, 5V, 1A Multicomp Pro 1 Buy Now
MC7805BTG - 5 Volt Regulator (modern 7805) On-Semi 1 Buy Now
RP2040 Xiao Seeed Studio 1 Buy Now
Pi Pico (RP2040) Raspberry Pi 1 Buy Now
Pi Pico W (RP2040 + CYW43439) Raspberry Pi 1 Buy Now
Rotary Encoder, 24 Detents, Vertical, w/ mon switch (PEC12R-4220F-S0024) Bourns 1 Buy Now
 

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element14 Presents  |  About James |  Workbench Wednesdays

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Top Comments

  • shabaz
    shabaz over 2 years ago +2
    Hi James, Fantastic work, thank you for explaining how all the features operate! Thanks for all your work on this, and to element14 for making it happen! I'm now highly motivated to work on a version…
  • Jan Cumps
    Jan Cumps over 2 years ago in reply to shabaz +1
    This query pops up most of the e14 articles for the Eurocard: /tags/pico_5F00_eurocard
  • DAB
    DAB over 2 years ago

    Very good review of a very useful product.

    It looks like a great device for element 14 to offer as a kit!

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  • shabaz
    shabaz over 2 years ago

    I've tidied it up, but also decided to embrace that area beyond the frame..

    All the prototyping area pads clutter is off the frame. It could move to a separate sheet, but I'll leave it there for now, it's still nicely out of the way and yet can be quickly zoomed/scrolled into view.

    image

    Close-up of the stuff that is beyond the frame!

    image

    The neat thing is that when plotting to PDF, just the important bit gets plotted!

    image

    I'll get the Kicad 7 project source into the GitHub site. There are lots of DRC warnings (all related to silkscreen cuts/overlaps or to the inverse text silkscreen, since that was just pasted in without a library) but those can be improved another day, since that could be quite tedious to fix each silkscreen issue. Also I have two weird errors where KiCad expects two footprints of type "Through-Hole" but sees "SMD". This might be a KiCad 7 error (I don't recall seeing it in KiCad 6 but I might be mistaken), but it seems benign, since this has not changed between revisions, and clearly the Rev 2.1 boards worked since they are tested physically. 

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  • baldengineer
    baldengineer over 2 years ago in reply to shabaz

    Ohhhh. I did not even make the connection (no pun intended) that they were consecutive! Damn. That's a good idea. Slight smile

    So yeah, I think if you removed the pin number silks, it wouldn't be so mind bending. (At least, for me.)

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  • shabaz
    shabaz over 2 years ago in reply to baldengineer

    I forgot to mention, in your video you referred to the connections on the right side of the board, and their numbering. The numbering is just the 32-way connector, unfortunately it doesn't correspond to the pins as you say. Maybe I should get rid of that connector numbering off the silkscreen.

    Anyway, the pins in that area are consecutive, in sections, which should be ideal for PIO projects since that prefers consecutive pins (although I've not used the PIO so far), so I'm hoping that ADCs/DACs etc are easy to hook up to that connector if desired. I've sketched the diag below to show the consecutive connections:

    image

    The oval silkscreen around those pins just indicates that they are I/O pins, and the little filled arrow on the oval indicates the direction of increasing GPIO value (since the ones in yellow in the diagram above go from IO16 to IO22 physically from the bottom-up, then the arrow for those points upwards.It's not a great labeling system, I was out of space there basically! : )

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  • baldengineer
    baldengineer over 2 years ago in reply to baldengineer

    On second, arguably the first, thought, maybe PIO doesn't make sense in this case since it's basically a look-up table.

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  • baldengineer
    baldengineer over 2 years ago in reply to shabaz

    Very cool idea.

    No driver IC? Hm. Sounds like a good PIO project!

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  • Jan Cumps
    Jan Cumps over 2 years ago in reply to shabaz

    This query pops up most of the e14 articles for the Eurocard: /tags/pico_5F00_eurocard

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  • shabaz
    shabaz over 2 years ago in reply to baldengineer

    Thanks! Also I just wanted to mention, it was Jan's idea to include PicoProbe capability on the board when the Rev 1.0 board was published and I was looking for feedback. The Rev 1.0 board was already quite packed, but it seemed such an awesome idea I didn't want to discard it, so I hunted around and found the Xiao RP2040 existed, and it turned out to be ideal for this purpose! And then Jan came through with properly creating a project for the Xiao version PicoProbe, and a load of other blog posts, so along with your Workshop Wednesday's video too, this has all been a great community effort!

    I built up these  Easy 7-Segment Displays  the other day. If they work I'll send them across to you and Jan soon (I want to create a plug-on protoboard with Mikrobus Click shield adapter since that seems handy). It's just a simple 7-seg display, just BJTs, and no driver chip, it relies on code to do the multiplexing effort, and it hangs off the 3x32-way connector area on the right side of the board.

    image

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  • shabaz
    shabaz over 2 years ago in reply to baldengineer

    Hehe glad it showed up, it's convenient having that for powering projects. That microscope gives very sharp images!

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  • baldengineer
    baldengineer over 2 years ago in reply to shabaz

    First, thanks again for sending the board. You did a fantastic job. And second, thanks for mentioning the link to Jan's work. (He posted that after I had submitted everything.)

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