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Project Ideation
Project Ideation
1- Tell us about the purpose of your project. Which problem does it solve? Why do you care about this? What were you inspired by? Include images and videos of similar projects
1- Tell us about the purpose of your project. Which problem does it solve? Why do you care about this? What were you inspired by? Include images and videos of similar projects
Let's make Digital Titrator!
Let's make Digital Titrator!
Where did my idea come from?
Since I want to continue my study in academia and chemistry lab would be my friend so, I thought of something that I had trouble with during college days in chemistry lab so it can help me and other science students!
What is the problem that this device solves?
Click on me to see this video :)
As you can see, this is one of the most significant chemistry experiments "Titration". The problem can be concluded in these points:
The endpoint in this experiment must be pale pink but what we usually obtain is deep pink which means that there is an excess of the titrant in the reaction vessel!
There are some drops from the titrant that do not enter the reaction vessel instead they poured outside the reaction vessel (check again the previous video at sec 13)
Overall, the volume taken is wrong and the results won't be accurate! plus of course, losing grades :(
Solution!!
Digital titrator! that would give accurate results by controlling the volume/time ratio.
2- Describe the project idea and general features. How would it work?
2- Describe the project idea and general features. How would it work?
Main Idea:
This model makes use of Arduino microcontroller to automatically titrate the given solution against another.
How would it work?
The titrant is added to the reaction vessel by means of a peristaltic pump through a fluid wire. The Arduino controls the time at which the pump is on and the time controls the amount of titrant is added (ml/min).
Why peristaltic pump? because I'm using chemicals that are corrosive to metals (category 1 according to the safety data sheet) so this is the ideal pump since it doesn't come in contact with the chemicals.
This is a video of how exactly the peristaltic pump works
A light intensity detector circuit will be interfaced with Arduino and placed beside the reaction vessel. It will be programmed in a way such that during titration, if the intensity of light that the LDR (light intensity detector circuit) -or color sensor- receives is below a certain preset value, then the buzzer makes a sound to indicate the end of the titration.
At the end of the titration, the volume of titrant used in the experiment will appear on LCD screen.
The second part of my device is the magnetic stirrer. Since every drop of the titrant solution that reaches the reaction vessel will react immediately and cause the appearance of the endpoint color so we have to stir the solution in the reaction vessel continually.
These videos illustrate simple ways to make a magnetic fan and helped me to visualize my own magnetic stirrer.
3- Sketch your project: You may use pen and paper or a simple sketching tool like Microsoft Paint or Photoshop
3- Sketch your project: You may use pen and paper or a simple sketching tool like Microsoft Paint or Photoshop
Project Planning
Project Planning
4- Describe the Technical Modules that your project consists of
4- Describe the Technical Modules that your project consists of
Construction Parts
The enclosure will be designed as 2.5D parts using Fusion 360 and fabricated using Laser Cutting.
Input (Sensing and/or User)
The digital titrator will take input from the user through pushbuttons.
Action
The digital titrator will deliver the titrant to the reaction vessel based on the input the user give. After the end of the titration, the amount of volume used will appear on the LCD screen.
There will be a magnetic stirrer that will be connected to the digital titrator so the reaction vessel can rotate during the titration process.
Brain
An Arduino UNO board will be used take inputs and generate actions.
Power Management
The titrator will be powered by 9V adaptor instead of a battery since it would be fixed so it needs to have a continuous power source.
5- Create a cardboard prototype of your project, demonstrating the project face as well as internal movements and mechanisms. Include a demo video and photos of the prototype.
5- Create a cardboard prototype of your project, demonstrating the project face as well as internal movements and mechanisms. Include a demo video and photos of the prototype.
Enclosure Design
IMG_2259.MOV
Face (input)
Side
Back
Top
6- Categorize your project’s User Features into: Minimum, Complete, and Nice-to-have features. List the required action and input components per feature.
6- Categorize your project’s User Features into: Minimum, Complete, and Nice-to-have features. List the required action and input components per feature.
Minimum Features: are the least amount of features that would demonstrate the coverage of all the technical modules and their complete integration
Complete Features: are the set of features that will complete your original project objective and vision
Nice-to-have Features: are the extra set of features that will make the project cooler, yet they need extra time, effort, and/or resources to finish
Minimum User Features
The user will input the volume wanted to deliver to the reaction vessel per sec through buttons that are placed in the face of the device.
Action: LCD
Sensing: none
User Input: tangible pushbuttons
A sound produces when the user stops the process -after reaching the endpoint- using a pushbutton.
Action: buzzer
Sensing: none
User Input: tangible pushbutton.
Delivering the titrant to the reaction vessel when the user clicks on the start button.
Action: servo motor or valve
Sensing: none
User Input: tangible pushbutton
This component will give an alert when the titrant cylinder is empty and need to be re-fill.
Action: ultrasonic sensor
Sensing: fluid level/distance
User Input: none
Complete User Features
The appearance of the volume consumed on LCD.
Action: LCD screen
Sensing: none
User Input: none
The magnetic stirrer works and stirrers the reaction vessel solution.
Action: magnetic fan
Sensing: none
User Input: on/off switch
Nice-to-have User Features
The titration stops automatically when the endpoint is reached.
Action: pump
Sensing: color sensor
User Input: none
The titrant reaches the reaction vessel using a peristaltic pump which is DIY.
Action: pump
Sensing: none
User Input: tangible pushbutton
7- What are the project tasks and its time-frame?
7- What are the project tasks and its time-frame?
Task
Sub-Tasks
From:
To:
Create Bill of materials
Look up power requirements for all components
Calculate power source requirements
one day
Design & Print Syringe
Create CAD on Fusion 360
15-Sep
16-Sep
Electronics & Programming on a breadboard (Minimum & Complete Features)
Feature 1: Input no. of mls need for titration.
Feature 2: Titration starts after using start button.
Feature 3: Titration stops after using stop button.
Feature 4: The volume used in titration appears on LCD.
Feature 5: The magnetic stirrer turns on after click on (on/off) switch.
Feature 6: If titrant container is about to end, the buzzer will make some noise and the word "Re-fill" appears on LCD.
17-Sep
19-Sep
Design Enclosure
Create CAD on Fusion 360
20-Sep (12:00AM)
22-Sep (11-59pm)
Fabrication & Integration
Fabricate and assemble the enclosure
Mount all components
Test minimum features
Test complete features
23-Sep
26-Sep
8- What are the required electronic components and materials for the project?
8- What are the required electronic components and materials for the project?
Component/Material
Amount
Link
Plywood
5 Sheets
Jumper Wires
Uncountable
Dispenser Syringe
Dispenser Syringe
1
Syringe Tips
Syringe Tips
1
Neodymium Stir Bars
Neodymium Stir Bars
1
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