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An Arduino compatible shield matched with a web based tutorial system to teach you how to talk with I2C and SPI components.
An Arduino compatible shield matched with a web based tutorial system to teach you how to talk with I2C and SPI components.
101 backers pledged $10,045 to help bring this project to life.

Working on the production design...

Posted by Daniel Hienzsch (Creator)
1 like

We just crossed the 80% funding threshold!  I know we'll cross well over the minimum required level, so I thought it wise to get started on the final production design of the boards that make up the hardware portion of the system.

The education shield has a few things that were necessary for the prototypes that I am planning on eliminating in the production version, unless you decide they should be maintained...

0 Ohm Jumpers - The board has a bunch of zero ohm jumpers on it that I used to electrically isolate the various subsystems during assembly.  That allows me to build the prototype piece by piece and test each section without the possibility of other systems causing problems if they were designed faulty.  Fortunately, none of the systems proved faulty, so I'm planning on removing them, to reduce the amount of components that the assembler will need to put down.  More parts = more chances of misalignment / reflow issues = higher percentage of failed boards on testing.

Test points - I placed test points at vital locations around the board to let me probe things like the I2C bus and the various voltage levels directly.  Again, this was for purposes of prototyping and the test points take up a lot of real estate.  I'm planning on removing those as well.

ADC Header - I want to flip the ADC header horizontal, which will require moving and reshaping the silkscreen describing the pin out.  This is a cosmetic change for the most part, but I think it will make some of the silkscreen around the Vref select jumper easier for you to see.

More silkscreen - I want to add silkscreen for all the Arduino connected pins so you'll be able to decipher which is which more easily.  I'll be labeling things like Serial Tx/Rx, SDA, SCL and the various SPI pins as such, rather than the common Arduino "A0, A1, A2" descriptions.

I may prettify up the edge of the board to match the shape of the underlying Arduino, but that's not all that necessary, and needs to be done with the input of OSHPark to still allow easy panelization.

Thank you to everyone who took the time to vote on the logo! I'm not sure if the workflow at 99Designs allows another poll after I've picked the final designer to work with, but if there is, you'll be a part of that too.

As always, I'm ready to answer any questions you have!


gavril likes this update.


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    1. Daniel Hienzsch Creator on

      Not a problem Steve. I'll include the test points in production.

    2. Missing avatar

      Margaret Johnson on

      I'm really enjoying your posts - and learning from them. Oh - and a HUGE congrats on the sub-circuits working seamlessly!

    3. Steve Rice

      I'm only one person, but I would like to see test points on key nets kept. I think this would be nice for people with a scope who want to see what is going on.
      Just my 2 cents. Looking forward to this project. Thanks