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Photometer for Nitrate Testing

Open-source testing platform capable of performing Nitrate Reductase Nitrate-Nitrogen Analysis Method. This allows you test for nitrates in water, soil, etc. Arduino compatible - read the tests on your Android device. For BOM, electronics and instructions please use resource link #1. For technical details see paper in resource link #2: Wittbrodt BT, Squires DA, Walbeck J, Campbell E, Campbell WH, Pearce JM. (2015) Open-Source Photometric System for Enzymatic Nitrate Quantification. PLoS ONE 10(8): e0134989. doi: 10.1371/journal.pone.0134989

Nitrate Testing, Photometer
Photometer for Nitrate Testing

Open-source testing platform capable of performing Nitrate Reductase Nitrate-Nitrogen Analysis Method. This allows you test for nitrates in water, soil, etc.   Arduino compatible - read the tests on your Android device.   Resource Link 1: BOM, electronics and instructions   Resource Link 2: technical details see paper on: Wittbrodt BT, Squires DA, Walbeck J, Campbell E, Campbell WH, Pearce JM. (2015) Open-Source Photometric System for Enzymatic Nitrate Quantification. PLoS ONE 10(8): e0134989. doi: 10.1371/journal.pone.0134989 open access

Nitrate Testing, Photometer
Customizable Rolling Pin Holders

My wife got these new age rolling pins - that are great but they turned out to be too large for the drawers. 3D printer to the rescue -- reasonably stylish toroids to hold them on the kitchen cabinet.

Custom Donuts, Custom Toroids, Rolling Pin Holders
Parametric Book Stand Display with Lip

This is a quick and easy - customizable book display stand for all of your great written tomes. Now with a lip.   Edit the scad file in OpenSCAD for your particular book.

Parametric Book Stand
Textile Fastener

This two piece device allows you to get a firm hold on any type of textile without puncturing them. The first part of the device, which we will call the lock (shown in blue), fits closely into the base, which we will call the star because of its resemblance to a ninja throwing star (shown in red). This device has numerous useful applications around the home no matter where you live. The project webpage is in the resource links.   Stretcher -€œ 6 fasteners, a blanket and 2 poles Hammock - 2 fasteners and a blanket Emergency Tent -€œ 4 fasteners and a plastic sheet or...

Textile Fastener
Electric Outlet Covers and Plugs

The idea for this set of things it to make the base designs for custom outlet covers both decora and duplex. The first goal of this project is for electric safety for families with young children with an unhealthy interest in electric outlets. Some of the covers have the electric holes completely concealed -- if you know you are never going to use them - this is a nice semi-permanent way of eliminating electric hazards without the hassle of dealing with the plugs. In addition, you can print out as many plugs as you need for your existing outlet covers. These plugs are designed to fit snug...

Outlet Covers, Outlet Plugs
Fiber Optic Cable Switcher

This is a holder to attach two fiber optic cable to a 8mm smooth rod and allow easy switching between cables for optical experiments. This component is part of the Open-source optics project (see reference links for details), whose goal is to radically reduce the cost of scientific optical hardware: by the Michigan Tech's Open Sustainability Technology Research Group. Instructions   Print on your favorite open-source 3D printer. The two fiber optic cables are placed within the holder is held in place with a set screw.   If you need the base go to ...

Fiber Optic, Fiber Optic Cable Switche
Safety Razor

Real men shave with a razor holder they print themselves. Sorry Gillette.   It works - the picture is of me having just shaved half my face with it.   Instructions:   To print: top, bottom and handle prints    m3 nut and screw.   Print the 3 STL files on your favorite open-source 3-D printer.   Place an m3 nut in the nut trap in the handle.   Place a double edge blade on the top piece as shown in the picture in red.   Then place the bottom on it and squeeze - the metal blade will bend slightly. This...

Razor, Shaving
Innovate or Die-- Customized License Plate Border

Using the following options:   top_word = Innovate  bottom_word = or Die  plate = 155.9  text_depth = 3  font_scale = 2.5

License Plate
Customizable Lens Holder

This is a lens holder for optical experiments.   This component is part of the Open-source optics project, whose goal is to radically reduce the cost of scientific optical hardware: by the Michigan Tech's Open Sustainability Technology Research Group. All measurements in mm. Scale for your application and print on your favorite open-source 3-D printer and enjoy.   This component is part of the Open-source Optics Library: Zhang C, Anzalone NC, Faria RP, Pearce JM (2013) Open-Source 3D-Printable Optics Equipment. PLoS ONE 8(3): e59840.   This is part of a...

Customizable Lens Holder
Optical Rail Mount for OpenBeam

This is part of a system of prints that turns an Open Beam into an optical rail. An optical rail is a long, straight, sturdy rail onto which optical components such as light sources and lenses can be bolted down and easily shifted along the length of the rail.   Commercial optical rail sells for $115/ft. Open beam only costs $10/m or $12/m for the fancy black anodized stuff. You get the idea. OpenSCAD code included for modifications. Just print on your favorite open source 3D printer and clean up. You can use a pretty low infill for this kind of a part.   You'll need 3-M3 Nuts...

Optical Rail Mount For Op
Customizable Chopper Wheel

This is a chopper wheel for optical and optoelectronic experiments.  This is a customizable chopper wheel -- derived from the very nice ---Parametric encoder wheels and the shaft lock for wheels with a nut cage for mounting firmly to a spinning shaft from our less versatile Parametric open-source chopper wheel.  It is a bit rough, could be made even more flexible and the OpenSCAD could used cleaned up a bit, but I leave that up to you.  This component is part of the Open-source Optics Library: Zhang C, Anzalone NC, Faria RP, Pearce JM (2013) Open-Source...

Chopper Wheel, Wheel
Customizable Tent Spike

This is a simple open-source parametric tent spike to be used to hold a tent or anything else you need to keep on the ground out in a field. We are using them to test different prototypes of small-scale portable solar photovoltaic racking designs. Choose dimensions that will fit on your print bed using the slider. This thing can be printed flat or on its hammer pad. If flat ensure you have a good substrate for adhesion as long solid parts like this have a tendency to curl on dirty surfaces.  I recommend relatively large infill percentages.  Unless you have special needs I...

Camping, Spike, Tent Spike
Customizable Perforated Cylindrical Plate

This is a quick customizable way to make an array of holes of any size in a cylindrical plate - specifically for use in a Buchner funnel

Perforated Cylindrical Pl
Customizable Square Array of Cylinders

This is a quick customizable way to make an array of columns of any size and with any size columns.  This little design is a great example of the beauty and power of OpenSCAD as it has lots of uses -- everything from setting up a 3-D printable plinko game to using them to make holes in your Buckner funnel to illustrating the geometry of your semiconductor nanocolumn array to optimize their optical properties for solar photovoltaic applications (see reference links for examples).

Array Of Cylinders
Half Sphere of Fluid

This customizer OpenSCAD script puts a half sphere depression in a cube - to be used for reactionware testing. You input the number of mL you want to use. Check my math.

Half Sphere Of Fluid
Lid for Half Sphere of Fluid with Injection Hole

This script makes a lid with a hole for injecting chemicals for a half sphere depression in a cube - to be used for reactionware testing. It is parametric and sized depending on the mL of fluid. 

Fluid Lid, Lid, Reactionware
Lid for Half Sphere of Fluid

This script makes a lid for a half sphere depression in a cube - to be used for reactionware testing. It is parametric and sized depending on the mL of fluid. 

Fluid Lid, Lid, Reactionware
Paddle and Oar Hooks

Do you have paddles or oars laying around? Make some custom hooks for them and hang them on your walls. Measure the width of your paddle or oar in mm and then use the Customizer to make a custom hook for it. You can adjust the angle of the hooks, length etc. so that it fits your oars exactly.  Print on your favorite open-source 3D printer and secure to the wall with a wood screw.

Hooks, Oars, Paddles
RecycleBot Chain Guard

This is a simple chain guard to keep you from losing a finger in the RecycleBot V2.2+ waste plastic extruder. Now that the RecycleBot is a little more safe - you will be interested to know that it is also much more environmentally friendly to print with recycled plastic at home than to buy commercial filament. See the reference links for more on the RecycleBot. Instructions   Print out the two parts on your favorite open-source 3D printer and then cut out the wall from an appropriate sturdy board material (you can do this by hand - but if you are really cool use your laser...

Recyclebot Chain Guard
Adjustable Laptop Stand

Worried about the news reports that "sitting is the new smoking"? Are you sitting now? Stand up at your desk and tone your backside while you work with this handy completely adjustable laptop stand. The open-source stand is made from 3-D printable joints and open-beam. Press on the spring loaded button in each joint to change the angle - it can adjust from flat for storage to "tv-tray" height or anywhere in between.  This is but one of many useful products our group, Michigan Tech's Open Sustainability Technology Research Group,  has found can save consumers money by fabricating...

Laptop Stand
Easy Bridge Test - 25mm

This is a quick test for bridging on a 3D printer.

Bridge Test
Libre Thin Axe Head

This is a customizable thin axe head meant to be printed on a metal RepRap printer like one in the reference links.

Axe, Customizable Axe
Libre Parameteric Chisel

This is a symmetric chisel meant to be printed on a metal RepRap printer seen in the reference links .  This is part of a project being carried out by members of the  Michigan Tech in Open Sustainability Technology Research Group  to make  open source appropriate technologies for sustainable development .

Chisel
Libre Axe Head v1

This is a customizable axe head meant to be printed on a metal RepRap printer like one in the reference links.

Axe, Customizable Axe
Customizable Horseshoe

This is a simple customizable horseshoe.  If you have a  metal printing RepRap  you may even be able to print custom perfect fit shoes for your favorite horse, pony, unicorn, etc. We haven't tested that yet - if you do let me know.

Horseshoe
Libre Pickaxe

This is a customizable pickaxe meant to be printed on a metal RepRap printer seen in the reference links.

Pickaxe
Libre Rake

This is a customizable rake is meant to be printed on a metal RepRap printer seen in the reference link.

Farming, Rake
Customizable Ankle Board (1-Axis)

This is a parametric printable ankle board / balance board, which only allows motion in one axis. It is used to rehab ankle injuries, improve balance and agility, core strength, improve athletic coordination, increase ankle motion, and general jedi training. Instructions: Ankle boards range from $20 to over $100 for the really good ones that allow you to customize the size. This design not only does everything that the commercial versions do but is better than all of those as it allows you to alter the size of the half-cylinder in OpenSCAD so as you get better you can increase the...

Ankle Board
Free Save the Planet Board Game

Save The Planet Board Game is free and open-source DIY cooperative board game. In the Save the Planet Game you and your family and friends can work together to save the planet to win, while learning how to save the planet in real life. The beginner option is appropriate for children 4 and up and the advanced option is a fun game for teens up to any age. This game is open-source so you are encouraged to build on it - make it better, add more good deeds, make a local deed list and make more advanced derivatives. Have fun!  The card box holds the Good Deed Cards and the Pollution Cards....

Save The Planet
Solar Simulator Sample Ring

This is an OpenSCAD design of a ring to hold samples for light soaking in a solar simulator. Print and attach sample with binder clips and hold with chemistry clamp as in photo.  This component is part of the Open-source optics project, whose goal is to radically reduce the cost of scientific optical hardware: by the Michigan Tech's Open Sustainability Technology Research Group. 

Solar Simulator Sample Ri
Customizable Corn Sheller

Shelling corn is a chore done by hand in much of the rural developing world. Corn comes in different sizes - and the various DIY shellers are a major chore to make. Here you can either use the customizer app or the OpenSCAD to get the right size of sheller for your crop -- then print in plastic or metal.  This is an example of 3-D printable open source appropriate technology developed by Michigan Tech's Open Sustainability Technology Lab.  This academic paper in the resource links explains how 3-D printing could be a powerful tool for pulling people out of poverty in the...