User:Estebanrojas27

User data
Name	Esteban Rojas Acuna
Interests	3D printing, OSH
Groups	242-2019 People
Courses	ENGR242
Registered	2019

Esteban Rojas Acuna is a current college student with excellent work ethic, and project and time management skills. Practical business administration experience including financial analysis, accounting, business analytics, and marketing. Received problem-solving and innovation training by interning with multiple companies, fluent in reading, writing and speaking English and Spanish.

Reflective paragraph on your participation in the Open Source movement:

Open Source Movement: I believe the open source movement is a revolution of designers and entrepreneurs who have decided to make their designs available for the public. These designs may be modified, improved and even changed completely with the purpose of sharing knowledge, improving current practices and making the world a better place. The only condition is to give proper credit to the designer, follow the proper licencing procedures and you're good to go! I have participated in the Open Source Movement by printing other people's design in my Jelly Box 3D printer, which I got from publications made in Thingiverse.com. I am very excited to be a part of the Open Source Movement by uploading my designs with a licence that lets other people use them and hopefully improve them!

Understanding the market[edit | edit source]

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and like this
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Project goals[edit | edit source]

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Big Money Project[edit | edit source]

This is a Christian Science "Crown and Cross" key chain designed for the engineering department of Principia College during the 3D printing Lab class directed by Dr. Marie Farson. The purpose of this Christian Science "Crown and Cross" key chain is to give as an incentive for every $5 donation for Do Good Be Happy, a Pincipia College based business that takes donations to then host community building activities.

This product was designed in FreeCAD and then using NetFab for STL file reinforcement.

This Christian Science "Crown and Cross" key chain has a Commons - Attribution - Share Alike LICENSE.

ACCESS TO FREECAD FILE, STL FILE, GCODE FILE and DESIGN SPECIFICATIONS: https://www.thingiverse.com/thing:4027029

COSTS:

$15/335mts * 2.23mts = $0.099 USD

TOTAL COST: $0.099 USD

The average cost for a Cross and Crown Christian Science key chain is $10 USD.

Savings: $9.90 USD

The slicing parameters used in the Ultimaker-Cura software were:

Christian Science
Black Filament
Dr. Marie Farson
White

Solar Powered Flashlight[edit | edit source]

Project developed by [Esteban Rojas Acuna [User:Estebanrojas27]]

Abstract[edit | edit source]

This is a 3D Printable Solar Powered Flashlight designed for low-income communities that have access to 3D Printers, Solar Panels and batteries. The main idea is to provide them with an easy to print design big enough to hold a circuit board, on/off button, led and input inside. The flashlight will be powered by a battery that was previously powered with solar energy, therefore it wouldn't be as expensive as buying batteries once they run out or as unsustainable as using the power grid to recharge them. This designed was a result of the OSAT project for the 3D printing class in the engineering department of Principia College directed by Dr. Marie Farson. The design includes a flashlight body and a lid, which have been carefully designed taking into account filament shrinking, so they can fit together.

This product was designed in FreeCAD, and there are two components: The flashlight and the lid. Both have independent STL, FreeCAD and GCODE files that are provided below.

This Solar Powered Flashlight has a Commons - Attribution - Share Alike LICENSE

Solar Powered 3D Printable Flashlight
Before 3D prints
Input and 9V Battery
Circuit
Vertical View
Back of Lid
Front View
Inside view
It works!
Side view design
Back view design
View of thread design
Lid top view design

Bill of Materials[edit | edit source]

ACCESS TO ALL FREECAD FILES, STL FILES, GCODE FILES and DESIGN SPECIFICATIONS: https://www.thingiverse.com/thing:3989964

COSTS:FOR THIS PROJECT:

-Circuit Board + components: $2.47| -Print Filament Flashlight: 28.04 meters: $15/335mts * 34.5mts = $1.25| -Print Filament Lid: 8.97 meters: $15/335mts * 8.97 mts = $0.41|

TOTAL COST: $4.13 USD

Tools needed[edit | edit source]

Jellybox or similar RepRap 3-D printer
Circuit Welder
Circuit Board
Resistor
LED
Capacitor
9V Bettery
On/Off Button
1.75 mm PLA Fillament

Skills and knowledge needed[edit | edit source]

Circuit Welding
Circuit Assembly
Ultramaker Cura Knowledge (Specifications provided)

Technical Specifications and Assembly Instructions[edit | edit source]

FOR FLASHLIGHT BODY PRINT

First, upload the "Weird but works.stl" file to a slicer software (Ultramaker Cura Recommended) in order to generate the GCode. This particular file will print the body of the flashlight. Second, when slicing, use the following parameters:

This print should take an average of 5 hours and it is advised to check on it every 30 minutes, that way if it fails you won't waste a lot of filament.

FOR LID PRINT

First, upload "THE LID_ Fixed.stl" file to a slicer software (Ultramaker Cura Recommended) in order to generate the GCode. This particular file will print the LID of the flashlight. Second, when slicing, use the following parameters:

It is VERY VERY VERY VERY IMPORTANT to print the LID 5% BIGGER!!! When in Ultramaker Cura (or whatever slicing software you're using), to go to the "scale: section and change 100% to 105%. This step will allow the LID thread and the Flashlight thread to fit perfectly.

This print should take an average of 1.5 hours.

FOR CIRCUIT ASSEMBLY

Use a board less than 10cm wide and 15cm wide. Therefore, it can fit inside the flashlight. Put the LED inside the Flashlight head and then weld with the circuit, this way it is locked in place. Then, when you finish assembling the circuit, pull the On/Off button and the energy input through the lid.

Once it is charged you can start using it!

Common Problems and Solutions[edit | edit source]

The biggest problem can happen if the LID .stl file is not sliced properly. It is imperative to set the scale to 105%, this way the lid will close.
Use a big enough capacitor, this way you can use your flashlight for longer.

Cost savings[edit | edit source]

If your solution is not a low cost one then it is not really appropriate.

As mentioned before in the Bill of Materials the total cost for this project is approximately $4.13 USD
A product considered commercially equivalent in Tanzania would be "Yellow LED Flashlight, AA, 55lm" found in Zoro.com, of the most used online stores in Tanzania. This product costs $9.59 USD [1].
A 4-pack of "Alkaline AA Battery" that would fit the previous flashlight costs $2.35 USD.

Savings not only would come from the price of the flashlight but also from the continuous use of batteries.

Savings = $9.59 USD + $2.35 USD - $4.13 USD = $7.81 USD (Not taking into account the purchase of batteries once the first ones run out)

Benefited Internet Communities[edit | edit source]

Community in Twende Lab in Arusha, Tanzania
Thingiverse.com
Appropedia.com

References[edit | edit source]

Twende Lab in Arusha, Tanzania
Principia College ENGR242 Dr. Marie Farson

OSH Science Project[edit | edit source]

This is a Waterproof Raspberry Pi 2B + Raspberry Pi Noir camera v2 Case designed for Dr. Scott Eckert in the biology department of Principia College during the 3D printing Lab class directed by Dr. Marie Farson. The purpose of this Waterproof case is to take pictures of Rattle Snakes allocated on campus for research purposes. This case has a waterproof entrance for cables, specifically for an external battery so the Raspberry Pi 2B and camera can be powered. The idea is to upload software to the Raspberry Pi that will take a picture every 5-10 minutes and capture the behaviors inside the Rattle Snake's dens providing data for Dr. Eckert's research.

This product was designed in FreeCAD, and there are two components: The box and the lid. Both have independent STL, FreeCAD and GCODE files that are provided below.

This Waterproof Raspberry Pi 2B + Raspberry Pi Noir camera v2 Case has a Commons - Attribution - Share Alike LICENSE.

ACCESS TO FREECAD FILE, STL FILE, GCODE FILE and DESIGN SPECIFICATIONS: https://www.thingiverse.com/thing:3950645

COSTS:

TOTAL COST: $80.37 USD

The slicing parameters used in the Ultimaker-Cura software were:

FOR BOX PRINT

FOR LID PRINT

Waterproof Raspberry Pi 2B + Raspberry Pi Noir camera v2
Box
Lid
Box and Lid
Top View
Camera Hole
Back of Lid
Attach Camera to Lid
Waterproof Cable entry
Front View

OpenCAD Design#1: Rock Wall Hand Hold[edit | edit source]

This Rock Wall Hand Hold is a result of an exercise done in the ENGR 242 class at Principia College taught by Dr. Marie Farson. We are currently learning the software program "OpenCAD" which will help us start designing and therefore contribute to the open source community.

This Rock Wall Hand Hold has a Commons - Attribution - Share Alike LICENSE.

The slicing parameters used in the Ultimaker-Cura software were:

Rock Wall Hand Hold
Side view
Top view
OpenCAD parameters
After pressing F6

FreeCAD Design#1: Weird Couch Thingy[edit | edit source]

This couch looking 3D polygon is a result of an exercise done in the ENGR 242 class at Principia College taught by Dr. Marie Farson. We are currently learning the software program "FreeCAD" which will help us start designing and therefore contribute to the open source community.

This 3D polygon box has a Commons - Attribution - Share Alike LICENSE.

The slicing parameters used in the Ultimaker-Cura software were:

Couch gallery
Can you sit on it?
Side view

BLENDER Design#1: Pyramid Box[edit | edit source]

This Pyramid Box is a result of an exercise done in the ENGR 242 class at Principia College taught by Dr. Marie Farson. We are currently learning the software program "Blender" which will help us start designing and therefore contribute to the open source community.

This pyramid box has a Commons - Attribution - Share Alike LICENSE.

The slicing parameters used in the Ultimaker-Cura software were:

Pyramid Box gallery
Opened!
Closed!

Design#1: Duo-Whistle[edit | edit source]

This duo ring whistle is specifically made for Umpires and Referees! It was designed by jipvanleeuwenstein in Oct 12, 2014 and the G-Code was pulled out from Thingiverse.com and sliced with Ultimaker Cura V.4.1. It works pretty well and it is very loud!

Whistle gallery
Great Design
Index Finger Fits Perfectly in the Whistle!
This is the type of license posted on Thingiverse
This is how the design looked on Ultimaker Cura

Design#2: Superman Logo[edit | edit source]

This duo Superman logo was designed by ErgoProxy on Jul 4, 2013 and taken from the movie "Man of Steel" (2013). The G-Code was pulled out from Thingiverse.com and sliced with Ultimaker Cura V.4.1. It looks pretty solid! and it is very cool!

Superman Logo gallery
Great Design
I will put this on my nightstand!
This is the type of license posted on Thingiverse
This is how the design looked on Ultimaker Cura

Design#3: 3D Wallet[edit | edit source]

This 3D printed wallet is a great design by Amplivibe posted Jul 26, 2013 and the G-Code was pulled out from Thingiverse.com and sliced with Ultimaker Cura V.4.1. I still haven't figure out how to fold it, I am afraid to break it! But if it did, I would love to use it as my personal wallet!

3D Wallet gallery
Great Design
Very slick finished
I wish it could fold :(
This is the type of license posted on Thingiverse
This is the how the design looks on Ultimaker Cura

Design#4: NASA LOGO[edit | edit source]

This NASA logo was designed by f16v1per May 25, 2014 and the G-Code was pulled out from Thingiverse.com and sliced with Ultimaker Cura V.4.1. I always loved the idea of exploring space and why not start with a great NASA LOGO to decorate my room?!

NASA LOGO gallery
Great Design
Black is the new Black?
This is the type of license posted on Thingiverse
This is the how the design looks on Ultimaker Cura

Costs[edit | edit source]

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