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Please find below, a linked video of the full Solder Kit Assembly process. 

This soldering project is not very difficult, and while the circuit board has pads for surface mount components, there are also through hole pads for each part.  It will take about an hour to assemble (20 minutes for more experienced hands).

If you've never soldered before, you should definitely take the plunge, there are tons of resources and videos available to provide assistance.  And always start out on a piece of scrap electronics, where you can melt solder, add solder, desolder connections, and get yourself comfortable with the amount of heat and 'smoke' which you will be encountering. 

Development / Git Hub
« on: September 30, 2016, 04:41:33 PM »
I have uploaded the code and placed all of the files into GitHub:


Users will be able to find information at all links throughout the forum, this Git Hub repository is meant to provide a basis for future development.

I also have modified the code to now have Menu's for changing settings, check out the Biodata Arduino Shield code!

Development / MIDI Sprout Enclosure Designs
« on: April 10, 2016, 11:00:03 AM »
The MIDI Sprout has gone through a series Enclosure Design iterations over the course of the project.  I would like to present those designs and make them available below (see link at bottom of Post).  Please Note: the designs are not 'perfect', and a limited amount of functional testing has occurred with all but the final card-stock design. 
           *****Be wary dear adventure, if you choose to print/cut/buy one of these enclosure designs minor tweaks, drill outs, or adjustments may be needed!*****

The Journey begins with the original enclosure design by Stephanie Tarbous, which features smooth curved edges, illuminated logo, and a built in battery compartment.  I think that you will agree that it looks spectacular!

We explored a few variations on this design through 3D printing.   This is a 'family picture' of three iterations of the enclosure from different 3D printers.  The white model is the 'first print' made in PLA with brass tacks as 'touch points', a few tweaks internally and to the logo size are shown in the middle green model, and a final 'smooth' green 3D print from Shapeways on the right.

Manufactured in flexible PLA, the test models used a simple 'snap' closure mechanism which worked well but could be easily broken/worn.  Modifications were made to the design for a 'screw' closure.  The 'screw' design was never fully tested/tweaked/finalized, and will likely require some light drilling, counter sinking, and self tapping screws.  The Shapeways 'Snap' version in Blue looks quite nice.

Manufacture of this Design could be performed through: 3d Printing, Injection Molded Plastic, or Resin Casting. 
The costs associated with 'tooling' the molds for Injection Molding are very affordable when making 30,000 units, but for our short run of 300 Sprouts injection was out of the picture.  This costs/scope was a big challenge to manufacture this (or any) custom design.

Working with a mold maker, an attempt was made to use Casting Resin and silicone molds. Due to the thickness of the thin walls and small features, Casting would require some significant redesign.  It was one of those 'so close' moments, where fine features didn't quite work and finishing work would have been quite laborious.

I began to experiment with different types of laser cut plastics and other 'alternative' casings.  Below you can see the original Prototype, a rough white 'Casting', a Clear Acrylic cut box, and an experimental case made from a small biodegradable food container!

Although I tried a few different designs in laser cut using 'living hinges' and layered approaches, even looking into CNC milling wood, but without a laser cutter (or 3D printer) in my personal shop I found it cost a bit too much to 'test' my novice designs.

In order to successfully enclose and ship the sprout a new design and approach was needed.  I had already manufactured and assembled the circuit boards for the Sprouts based on the 'plastic' design, and any new enclosure would need to adhere to the constraints of the board (namely no mounting holes!).   

I started from scratch, holding onto a few key design aspects:

And then the realization - Cardboard!  Paper-Stock is durable, comes in many thickness and colors, cuts/scores/folds, and is biodegradable ...

That is when we reached out to our Kickstarter Supporters and asked for advice on designing a new enclosure.  Our (new) buddy Jeremy Helms jumped into action, and working with a few designers and teams came back to us with this:

And now you have your MIDI Sprout in your hands!

This is the design file for the final card-stock enclosure.

If you are interested in these designs or want to explore the various stages, please find a series of pdf's, sketchup skp's, and STL's at this link:  MIDI Sprout Enclosure Files Also you can find our 'Snap' and 'Screw' models in our MIDI Sprout Shapeways Store. - The 001 'Blue' Snap Model includes 3 pieces which must be ordered - the Top, Bottom, and Battery Door.  Same goes for the 002 'Screw' model with three parts.  If you choose to purchase a shapeways print, please be sure to choose the same version for each part!!!!  Users will need to provide a battery box or contacts: these are the battery connectors used on the 3D prints, they cost about $6 for a set .

Questions / Post a new Topic here for Questions
« on: March 30, 2016, 06:40:45 PM »
Post a new Topic here to ask questions or to share your experiences with MIDI Sprout.

Questions / Setup and Usage of MIDI Sprout
« on: March 29, 2016, 09:14:26 AM »
Add a Topic under this category to ask questions about MIDI Sprout setup and usage.

Click on the thread below to discuss your MIDI Sprout Setup and ask any Usage Questions:

Please find below, three videos detailing the assembly of the MIDI Sprout Kit:
1. MIDI Sprout Kit Parts (Part 1) -

2. MIDI Sprout Kit Galvanometer (Part 2) -

3. MIDI Sprout Kit Final Build (Part 3) -

Development / MIDI Sprout Development Discussion
« on: March 27, 2016, 05:13:33 PM »
Use this thread to discuss MIDI Sprout Development and ask questions.

Development / MIDI Sprout Circuit Board
« on: March 27, 2016, 05:12:21 PM »
Please find below links to eagle files of the MIDI Sprout circuit board, and a PDF of all the board layers.

Board Top PDF
Board Bottom PDF
Eagle Board File
Eagle Schematic File
Easy Schematic PDF
Gerber Zip

There are many great options for having a custom circuit board created.  I recommend using http://OSHpark.com who rapidly produce custom boards of 'any' size at a very affordable price.

The MIDI Sprout circuit board accommodates both SMD (surface mount) and Through-Hole components, making it easy for builders of many experience levels to construct the MIDI Sprout.
This is a link to my shared board design on OSHpark

Stay tuned to the http://support.midisprout.com/index.php?board=4.0 Tutorials section of the form for information about assembling a solder circuit board for the MIDI Sprout.

MIDI Sprout Tutorials / MIDI Sprout Tutorial - iOS Connection
« on: March 27, 2016, 04:24:14 PM »

You can connect your MIDI Sprout to an iPhone or iPad using a MIDI to iOS converter.  MIDI is 'plug and play' on most iOS Synths, and different iOS Synthesizer applications store their MIDI settings in varying locations; See the documentation from your favorite iOS Synth in order to locate and configure your MIDI inputs.

MIDI Sprout Tutorials / MIDI Sprout Tutorial - MIDI Sprout Tools
« on: March 26, 2016, 04:16:12 PM »

I am happy to release MIDI Sprout Tools v003 for PureData (pd)

This is an OSX puredata (PD) standalone build.  MIDI Sprout Tools v003

You will need to configure your MIDI inputs and outputs under Preferences. 

X11 is also needed to run pd extended on OS x.

Be careful, its really easy to get a feedback loop between Ableton Live and the IAC MIDI bus!


sNoize MIDI Monitor for OS X: https://www.snoize.com/MIDIMonitor/
MIDI-OX Monitor and Routing: http://www.midiox.com/

MIDI Sprout Tutorials / MIDI Sprout Tutorial - Batteries
« on: March 26, 2016, 04:15:17 PM »

1. Open the MIDI Sprout enclosure
2. Insert 3 AA Batteries - ensure correct polarity
   * MIDI Sprout does not have reverse voltage protection, inserting batteries in the wrong direction will cause the chips and wires to heat up (fast) and can destroy the MIDI Sprout
   * Battery connectors to circuit board - Positive (red) closer to Knob (blue component)
3. Close box and replace MIDI port retaining tab
4. Turn the knob clockwise to turn on, performing a brief boot up light show.

Low Power Mode experiments http://support.midisprout.com/index.php?topic=6.msg6#msg6

MIDI Sprout Tutorials / MIDI Sprout Tutorial - Welcome
« on: March 26, 2016, 04:14:38 PM »

Hello and Welcome to MIDI Sprout, your personal Biodata Sonification System!

Development / Secrets and Easter Eggs
« on: March 17, 2016, 08:47:44 PM »
As an Experimental Easter Egg... I have included a PWM to CV low pass filter on one of the ATMEGA328 outputs, this provides ~0-~5V control voltage which mirrors the CC 80 MIDI control.  By opening your Sprout and looking near the ICSP, you will see a pad marked CV. By tapping this point as positive voltage, and gathering Ground from another point on the board (there is a pad marked) you can easily break out the CV.

It is important to note, tying the MIDI Sprout ground to a modular synth may impact the 'sensitivity' of the device, depending on grounding loops and isolation.  One of the reasons the Sprout uses MIDI is to optically isolate the galvanometer attached to the plant from a user's synthesizer or computer (just like MIDI spec intended ;)

Please join our Support forum and share your experiences with adding the Control Voltage output (and whether it works or not!)

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