16. Applications and Implications¶
Group assignment:¶
None
Individual assignment:¶
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Propose a final project masterpiece that integrates the range of units covered, answering:
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What will it do?
- Who has done what beforehand?
- What will you design?
- What materials and components will be used?
- Where will they come from?
- How much will they cost?
- What parts and systems will be made?
- What processes will be used?
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What questions need to be answered?
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How will it be evaluated?
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Your project should incorporate:
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2D and 3D design
- Additive and subtractive fabrication processes
- Electronics design and production
- Embedded microcontroller interfacing and programming
- System integration and packaging.
What I’ve done this week¶
What will it do?¶
For my final project, I decided to design an access control system for the machines of a fablab.
The idea of this project came from the difficulties we have to manage and follow the access and maintenance of the different machines of our fablab.
The objective of this project is to design a device that will allow to give access to the machines only to qualified people, which will reduce the rate of accidents on the machines and increase their life span.
The device that we will build will recognize people thanks to a badge.
Who has done what beforehand?¶
I have been looking around other fabacademy students’ projects, and noted at least 3 relevant ones.
To see what is already available on the market we are inspired by the FABMAN product.
What will you design?¶
I will design two main modules: the DIGITPASS module for the access control box and the MPASS module for starting and stopping the machines.
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For the DIGITPASS module we plan to design the case as well as the whole electronic part.
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For the MPASS module we plan to design the case and all the electronic part except the connections for the power supply of the machine and the module.
What materials and components will be used? / Where will come from? / How much will they cost?¶
| Component | Origin | Price ($) | Quantity | Subtotal ($) |
| SWITCH TACTILE 0.05A 24V | Digikey | $ 1,08 | 2 | $ 2,16 |
| RES SMD 100 OHM 1% 1/4W | Digikey | $ 0,10 | 6 | $ 0,60 |
| RES SMD 10K OHM 1% 1/4W | Digikey | $ 0,10 | 3 | $ 0,30 |
| CAP CER 10UF 35V X7R 1206 | Digikey | $ 0,48 | 3 | $ 1,44 |
| CAP CER 1UF 50V X7R 1206 | Digikey | $ 0,15 | 3 | $ 0,45 |
| CAP CER 0.1UF 35V X7R 1206 | Digikey | $ 0,23 | 1 | $ 0,23 |
| SWITCH SLIDE SPDT 100MA 12V | Digikey | $ 1,09 | 1 | $ 1,09 |
| LED BLUE CLEAR 1206 SMD | Digikey | $ 0,37 | 3 | $ 1,11 |
| LED RED CLEAR 1206 SMD | Digikey | $ 0,39 | 3 | $ 1,17 |
| ESP32-WROOM-32D-N4 | Digikey | $ 4,08 | 1 | $ 4,08 |
| IC REG LINEAR 3.3V 1A SOT223 | Digikey | $ 0,63 | 2 | $ 1,26 |
| IC REG LINEAR 5V 1A SOT223 | Digikey | $ 0,68 | 2 | $ 1,36 |
| ESP-01S ESP8266 Wi-Fi | Digikey | $ 4,40 | 1 | $ 4,40 |
| DIODE SCHOT 100V 1A MINISMA | Digikey | $ 0,45 | 1 | $ 0,45 |
| CONN HEADER SMD 4POS 2.54MM | Digikey | $ 0,93 | 1 | $ 0,93 |
| CONN HEADER SMD R/A 36POS 2.54MM | Digikey | $ 0,12 | 40 | $ 4,80 |
| CONN HEADER VERT 40POS 2.54MM | Digikey | $ 0,02 | 12 | $ 0,24 |
| CONN RCPT 4POS 0.1 TIN SMD | Digikey | $ 0,70 | 4 | $ 2,80 |
| 6W, 2.54MM PTH SOCKET, SIL, SMT | Digikey | $ 0,93 | 7 | $ 6,51 |
| 5W, 2.54MM PTH SOCKET, SIL, SMT, | Digikey | $ 0,86 | 1 | $ 0,86 |
| 2W, 2.54MM PTH SOCKET, SIL, SMT | Digikey | $ 0,49 | 1 | $ 0,49 |
| RELAY | AKUNATEK | $ 4,00 | 1 | $ 4,00 |
| HiLetgo 2004 20X4 LCD Display | AMAZON | $ 10,00 | 1 | $ 10,00 |
| KY-40 Rotary Encoder | AMAZON | $ 7,42 | 1 | $ 7,42 |
| Module RFID | AMAZON | $ 7,65 | 1 | $ 7,65 |
| BUZZER MAGNETIC 5V 12MM TH | AMAZON | $ 0,61 | 1 | $ 0,61 |
| PLA 1,75mm. filament (3D Printing) | Prusament | $ 29,99/kg | 200g | $ 6,00 |
What parts and systems will be made?¶
- Electronic circuit
- Box
What processes will be used?¶
2D and 3D design:
- SolidWorks
- Inkscape
Additive manufacturing:
- 3d printer : Prusa i3 MK3S+
Subtractive manufacturing:
- Milling PCB board using Roland SRM-20
cutting:
- Vinyl Cutting
Program:
- Interface programming using Node-Red
- Embedded programming using Arduino IDE
- Use of a mysql server database
What questions need to be answered?¶
- Is the communication protocol reliable?
- Do the design materials match the working environment of a fab lab?
- Can the MPASS module support the power supply of a Fab Lab machine?
How will it be evaluated?¶
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Check if the NUMPASS module has successfully identified registered and unregistered badges in its database.
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Check if the NUMPASS module has successfully communicated with the MPASS module for the ignition or extension of a machine.