20. Final Project Requirements¶
I am finding that the last four assignments ask for many of the same things over and over. So here they are again....
Presentation of Project¶
I successfully presented my final project to Neil on Monday, June 13.
Final Project Web Page¶
My final project web page is here
Slide and Video¶
My slide:
My video is here
Bill of Materials (BOM)¶
Total cost was about $250. The most expensive item is a 270 watt solar electric panel at $120 delivered. Details below:
Found lots of stuff in dumpsters and from the shopping cart metal recyclers all over town
- Electronics
- Solar Panel - Purchased used on Wallapop for $125 delivered
- SAMD based microcontroller boards - making them but not the chips ha ha. Each board has about $10 in parts plus 40 hours of labor
- OLED display - was in stock, $10 if purchase
- Temp sensors - was in stock, $2 if purchased
- GPS (for time) - $6 from Amazon
- amp sensors - $10 for 3, from Amazon
- voltage sensor - voltage divider 2 resistors $0.50
- Boost DC to DC power supply for peak power point tracking - $25 from Amazon
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Oven Enclosure
- Insulation good to 150 deg c -this has been the most challenging and messy part of the project. The fiberglass insulation I have been pulling from dumpsters is of poor quality and falls apart easily releasing lots of irritating fibers. The foam insulation is styrofoam, only good to about 70 deg C
- Plywood - was in stock at the fablab, $60 per sheet, one sheet
- Door - fabricated from scrap plywood
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Cables and connectors
- Cig Lighter Plugs - generally a poor choice but good enough here - $5.00 on Amazon
- MC3/4 connectors - $15 for 6 pairs
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Toaster Oven - bought for 1 eu from a metal recycler
According to the Guardian article below there 50-100,000 shopping cart metal recyclers in Catalonia and they recycle 100,000 tonnes of metal a year worth 10 billion euros.
Guardian Catalonia metal recycling article
Final Project Related Assignments¶
Links to assignments where I worked on the final project:
Week 1 Principles and Practices - selection of final project, first draft of block diagram for my final project, list of things needing research, etc.
Week 8 Computer Controlled Machining - the box for the oven
Week 11 Output Devices - learned and implmented i2c for running LCD displays for my final project, designed a relay board for controlling the heating elements in the oven
Week 13 Input Devices - Got voltage and temperature sensing working on my Sunduino board.
Week 14 Networking and Communications- made a new relay board for my final project and communicated with the main board via I2c
Week 17 Applications and Implications - came up with the Dr Who Tardis idea and turned the box for the oven into a Tardis-like object.
Design files¶
Software I used:
- KICAD for electronics design and layout
- MODS for PCB manufacturing
- for cnc machining
- Rhino for 3d design for 3d printing
- Cura for creating 3d printer files
- Rhino and Inkscape for 2d design for laser cutting
Electronics
esp32 modified barduino design file
Sunduino pcb board milling file
power distribution board design file
voltage divider board design file
Cover/Cabinet/Tardis
Clip to hold amp sensor
[clip file (3d print)]../files/final-project-for-web site/Clip for Amp Meter (3D Print)/clip for amp meter ver 2.stl)
License¶
I used a creative commons Attribution Share Alike license.
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Acknowledgement of Work by Others¶
I acknowledge work done by others throughout my documentation. Special mentions:
Josep Marti - lots and lots of help solving vexing problems with machines and software. I often struggled too long with problems on my own before going to him to help solve them. Also
Eduardo Chamorro - Same as Josep plus extra help on Rhino and Grasshopper. Prof Chamorro is knowledgeable in all areas of Fabacademy making, with special expertise in 3d printing.
Marco Antonio Sardo - Recommended I use a boost switching mode power converter instead of the inverter I was planning on using to match the solar panel voltage to the voltage required by the heating elements in the toaster oven. He gave me a tutorial on switching mode power converters that enabled me to design and test switching mode power supplies with a simulator on-line. Had many conversations with Marco on details of electronics design.
Edu Almasque - saved the day many times on GIT related issues such as how to recover from pushing a too large file.
Dahnu Prakash - critical help solvign problems with CAD software, esp Rhino, Grasshopper, and Fusion 360