What is my group chemical device?
- Half-boiled egg cooker prototype.
- Is to assist coffee shop workers with their job.
- Perfectly cooked half-boiled eggs by using our device without any human error.
How does it work?
- When the temperature of the water is at the right temperature.
- The egg will be submerged into the pot of hot water.
- The timer will start when the egg is submerged.
- The egg will be lifted up after a specific time.
- Therefore, the consistent perfectly cooked half-boiled egg is achieved.
How my team planned, allocated the tasks, and executed the project
Step 1: We used the design thinking process. Eg: Ideations of the product, TRIZ and Part -whole analysis.
Step 2: We formed the BOM (BILL OF MATERIALS).
Step 3: We formed the Gantt chart.
Step 4: Allocation of the task.
Task | Name |
CAD modelling of frame, box, attachments Frame construction Gather materials, components | Alex |
3D printing of attachments DC motor coding | Emily |
Temperature sensor coding Test run for combined code | Iman |
Laser-cutting of box | Syufyan |
Product assembly | Everyone |
Design and build process of the Half-boiled egg cooker
Part 1 :
CAD modelling of the frame, box, attachments (Done by Alex)
Link to Alex's blog: https://neoyijiealexcp5070.wixsite.com/cp5070-2b07-gp5-alex
Part 2 :
3D printing of attachments and DC Motor code (Done by Emily)
Link to Emily's blog: https://cp5070-2021-2b07-group5-emily.blogspot.com/
Part 3:
Temperature sensor code and combine code for a test run (Done by myself(Iman))
How do I code the temperature sensor in Arduino?
Step 1: Research the DS18B20 temperature sensor on the internet.
Step 2: Learn how it works on Youtube.
Step 3: Build the circuit. Source: Click this link
Step 4: Install library for the DS18B20 Temperature sensor into Arduino IDE.
Step 5: Coding on Arduino.
Step 6: Test the code.
One important component for the DC Motor is L298N (H-Bridge)
Furthermore, it will help to change the direction of the motor. For example, from clockwise motion to anti-clockwise motion.
Combine the 3 components into one circuit
We added 2 powerbank to power the Arduino Maker Uno and H-bridge for portability. Furthermore, we add an on/off switch so that it is easy to turn on/off with the box.
Combine the 2 codes (Temperature sensor and DC motor)
*The final combined code
Part 4 :
Laser-cutting of the box (Done by Syufyan)
Link to syufyan's blog: https://syufyan13.wixsite.com/cp5070-2b07-syufyan
Problems and solutions:
Problems
- The basket was not in the right starting position
- The code only runs when the temperature is at the set point.
- The DC motor does not have the braking power needed to hold the basket in place (gravity)
Solution
- The rest of the code runs when the temperature has been reached.
- Use a bit of power to hold the motor to hold it in place.
- Using the absent braking power - let gravity pull the basket down.
Project design file as downloadable files :
