Week16
Applications and implications
Assignment
Propose a final project masterpiece that integrates the range of units covered.
Your project should incorporate:2D and 3D designadditive and subtractive fabrication processeselectronics design and productionmicrocontroller interfacing and programmingsystem integration and packagingWhere possible, you should make rather than buy the parts of your project. Projects can be separate or joint, but need to show individual mastery of the skills, and be independently operable.See Final Project Requirements for a complete list of requirements you must fulfil.The answers to the questions below will allow you to create your BOM (Bill Of Materials).
Learning outcomes
Define the scope of a projectDevelop a project plan
Have you answered these questions?
What will it do?
“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 will finalize the development made so far and focuses on one element of this exposition, the brain. The idea is to develop a representation of the brain (real size) that will vibrate at the different areas 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.
Who has done what beforehand?
- I found Harry´s documentation, who did something very similar here. - Another interesting work done by the department of anatomy in the Institute of Biomedical Sciences, University of São Paulo, Brazil, where a low-Cost tactile neuroanatomy learning tools for students with visual-impairment was developed. More about it here.
What will you design?
All parts and systems except for the brain model, that was found in the NIH 3d exchange collection and the DFR0299 mini MP3 player for arduino that was bought here.
What materials and components will be used?
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.
What parts and systems will be made?
All parts and systems designed except for the 3D brain model, that was found in the NIH 3d exchange collection and reproduced (3d printed) and the DFR0299 mini MP3 player that was bought here and integrated. See more in the project development page
What processes will be used?
So far, 2d and 3d design, Additive (FDM, rapid casting), substractive (milling, laser cutting), joinning (soldering SMD) processes were used, as well as a lot of good will, head scratching and some hair loss.
What questions needs to be answered?
I need to make the last node (audio output, mini mp3 player) for this spiral and make sure that it is adequate for this project.
How will it be evaluated?
My first guess is by comparing the final project proposal and the final results? For now as a first spiral, I am hoping to get: The step response done in Week10 along with the resin part done in Week11 as my input. x2 mototor (vibrator) board made in Week12 + audio (working on it right now) as my output. The design started in Week2 and modifyed along the program (see in development page) only needs the size of the last node (audio) to be printed. The brain model will be cast by using technics and material used in Week11, I will cast the model and put in place x4 motors, as I am hoping to add x2 more motors in the next spiral.
So as a final project I should have a device that goes through a routine and indicate the 2 hemispheres of the brain by vabrating as well as an audio informative track playing along.
The next spiral will be adding a motor controler (other node) for the remaining x3 motors.
And the one after that will be to add the sessors in the brain model as a trigger so that the device is activated as the user touches the differents areas.
The next after that will be to work on the Cerebellum and Spinal cord that have been left out because of their location and will be represented with a separated device.
Here is a list of what I still need to do in order to finalise the project:- Re-design the electrodes- Design the last node for the audio output and integrate the mini MP3 player- 3D print all parts needed- Cast all part needed (mold and brain, integrating the motors)- Test all electronics funcionality- Mount all and test- Add the bill of materials- Finish all requiered materials for the final project presentation (video and documentation)