# Assignment

* Identify an open source appropriate technology (OSAT) that you would like to design to be a 3D printable technology
* Make sure someone else has not already done it : existing designs here. (You can choose to do a major improvement on past design)
* Reserve your OSAT by signature tagging with ~~~~ next to the OSAT on the list generated by the Appropedia community: Requests for 3-D printable open source appropriate technology. You can add your own ideas to the list, more than one of you can tackle the same tech in a different way, you may improve upon existing designs if you do so in a significant way. Double check someone else has not already done a better job - use http://yeggi.com
* Design 3D printable components with ONLY OS CAD packages (e.g. Blender or OpenSCAD or FreeCAD) for FreeCAD put on https://www.youmagine.com/ and link back to it on Appropedia.
* Create an Appropedia page for your project.
* Include the following sections on your page using the template below (copy and paste wiki markup into your page)
* Add picture and link to your project page in gallery below.
* Print component and bring to class

# Grading

* 20% Print quality
* 30% Documentation
* 25% Design (design for printing, plastic minimization)
* 25% Function - Is it OSAT? Does it work?
Automatic reductions: -50% no source or the use of non-OS software -10% per day for late

# Gallery

* OSAT 3-D Printable Designs
* Corn sheller

# Template For use in Appropedia - copy and paste all wiki markup below and paste on new page on Appropedia
## Title of the device or system

Template:Statusboxtop Template:Status-design Template:Status-prototype You can help Appropedia by contributing to the next step in this OSAT's status. Template:Boxbottom

## Abstract

* Paragraph description of the OSAT - why is it Appropriate? What need does it fulfil? Are there case studies you have found of a technology being used successfully?
* Picture of completed print using your printer

## Bill of Materials

* Provide a full BOM -- Materials needed for fabrication of device and alternative materials if they are not available, prices/sources of non-printable parts
** Upload and link to all source files from open source CAD
** Upload and link to all STLs

## Tools needed for fabrication of the OSAT

* MOST Delta RepRap or similar RepRap 3-D printer

## Skills and Knowledge Necessary to Make the OSAT

* If you used special skill – link to relevant wikipedia or wikiversity articles/courses

## Technical Specifications and Assembly Instructions

* Provide directions for print/assembly - be detailed enough in your “how to” to ensure that someone could construct the device from your description. Consider the elegance of IKEA like instructions.
* Include print time estimate
* Include assembly time estimate
* Including drawings or pictures of the device at stage of assembly at minimum. (http://www.appropedia.org/Special:Upload)
* Consider video if appropriate
* Example video summary of textbook
* id=yiJDx9dCfEQ}}

### Common Problems and Solutions

* Include common mistakes/problems to avoid in building your OSAT and how to overcome them

## Cost savings

* If your solution is not a low cost one then it is not really appropriate.
* Estimate your costs
* Find a commercial equivalent
* Calculate $ savings and % savings

## Benefited Internet Communities

* Name and add links to at least 5 using single brackets around [url name]