Final project
Week1 - Project managment/principles and practices
Description
“Hoy toca neurociencia” (cerebral hemispheres) is an interactive exhibition project for the visually inpaired and blind persons. Although it is developed with the disability in mind, it is inclusive and accessible to everyone. This project educates on the functions and focuses on providing information of the interior of the human body. My project focuses on one element of this exposition, the brain. The idea was to develop a representation of the brain (real size) that will vibrate at the different areas (so far left and right hemispheres) being described by an audio track. The user will then be able to distinguish the location of these parts by touching the model and learn about the humain brain.
Week2 - Computer-aided design
First draft
During week2 I started thinking about the design and how to incorporate motors and LEDs in the rubber brain.
Week8 - Embedded programing
Electronic part first attempt
That week I had a first attempt at controling the motors.
Week10 - Input devices
Step response as input
This is where I design and made the step response inout device.
week11 - Molding and Casting
Casting the touch pad
This week I made the touch pad for the front panel and tested a lot of materials for the brain model. I also started modifying the brain model to make it easier to print and cast and done some modification to the base model.
Week12 - Output device
Output device
In week16, I worked on a revised and improved verion of the motor controler used as my output device.
Week13 - Networking and communications
Network test
First test of networking and communication.
Week16 - Applications and implications
Audio output
Getting the audio output ready.
Week17 - invention, intellectual property, and income
Brain casting, 3d printing and laser cutting
That week I 3d printed all parts, cast the brain and laser cut the lid for the inclosure of the base.
Week18 - Project development
Final tests and touches
This week I trying get evrything finished and working for the presentation...
Week19 - Project presentation
The descriptive slide...
...and the video.
See full details of the work done for this project each week in the "project development page".
BOM
Black PETG 0.5kg - Eolas Prints - €29.95/1kg
White PETG 20g to 30g - Eolas Prints - €29.95/1kg
Alginate about 300g to 500g - Alga cast - €24.20/1kg
Platinum Silicon 900g - Plasticil Gel - €33.88/900g
Machinable wax - Freeman wax - €13.36/1lb
ResinPro 10g - ResinPro - €31.45/1.6kg
x5 Coin Vibration Motors - DC motors - €2.63/10units
x5 RGB LEDs - Elegoo - €9.34/Assorted led 350 pck
x5 220ohms Res(through hole) - Elegoo - €10.99/Assorted res 525 pck
x2 1K Res(SMD ) - Digikey - €0.08/unit
x2 1M Res(SMD) - Digikey - €0.08/unit
x3 CONN HEADER SMD 4POS 2.54MM - Digikey - €0.67/unit
x2 CONN HEADER SMD 6POSx1 - Amazon.es - €8.99/40 pck
x2 CONN HEADER SMD 3POSx1 - Amazon.es - €8.99/40 pck
x3 CONN HEADER SMD 2POSx1 - Amazon.es - €8.99/40 pck
x3 CAP 1Uf(SMD) - Digikey - €0.23/unit
x1 CAP 10Uf(SMD) - RS online - €0.24/unit
x1 IC REG LDO 5V 1A - Digikey - €0.46/unit
x2 Allegro A4953 IC BRIDGE DRIVER - Digikey - €1.56/unit
x1 ATTINY412 - Digikey - €0.42/unit
x1 ATTINY1614 - Digikey - €0.65/unit
Jumper cables - Elegoo - €6.99/120 pck
x1 Mini MP3 player - DFRobot - €5.90/unit
x1 64 GB microSDXC - Lexar TF Card - €16.99/unit
x1 Arduino nano - Elegoo - €11.56/3 pck
About €110 of materials.
Here you can find the final version of the fusion project with all the 3d models used along with the svg file:FUSION File - SVG
The stl files, BASE,NECK,NECKFOOT, FRONT PANEL FRAME, GUIDELINE and the MP3 MOUNT.
NOTE: The files used to make the mold turned out to be huge (together left and right hemispheres, with the neck, 43MB). The fusion file contains a converted low poly version that allowed me to design the rest of the pieces around it.!USE WITH CAUTION! The brain model downloaded from the NIH 3d exchange page, if your computer is a old or not the most beefed up, the file size really makes it hard to manupulate, I started on an I3 machine and it was really just about able to open it, on an I7 on the other hand was much better. Here is the file from an external repo as the size is way over the 10mb limit allowed here.
The work done so far should be shared under this creative commun licence: (CC BY-NC-SA 3.0).
