2 Apr 2023 - No decisions made just trying to finish up what we can.
21 Mar 2023- Buying the bigger size of the PCB
Why was the change suggested?
The new circuit is too big for the PCB that we have, so we decided to buy for bigger PCB.
Who suggested?
Liam
18 Mar 2023- decided to find the premade code for Arduino
Why was the change suggested?
Learning code from scratch was too difficult in a short amount of time that we are given.
Who suggested?
Jamie
13 Mar 2023- decided to buy the component through the local shop
Why was the change suggested?
The online delivery expected was too late so we ended up going to buy our new components at the local store.
Who suggested?
Sangyeop
19 Mar 2023 - No decisions were made this week, we just focused on collecting parts for the new pump circuit, built it and started testing.
8 Mar 2023 – Building other circuit with Ultrasonic Sensor
Why was the change suggested?
An IR sensor did not work as we thoughts, there are irregular results coming up through the experiments and we troubleshoot to figure out and found out the sensor has a flaw so we decided to buy the Ultrasonic sensor instead.
Who suggested?
The idea of a new sensor was suggested by the tech advisor and Jamie and Sangyeop have decided to revise it.
7 Mar 2023 – building with 74HC123 transistor in case the 555timer circuit would not work
Why was the change suggested?
There are some components that has not arrived yet, over the discussion with tech advisor we decided to make other one just in case.
Who suggested?
Tech advisor suggested the idea
3 Mar 2023 - Switch from 9V battery to 6 AA batteries
Why was the change suggested?
A 9V battery would not run the circuit for a very long switch to 6AA increases the run time of the circuit.
Who suggested?
Jamie researched how to increase run time through the use of batteries.
24 Feb 2023 - No other decisions were made as it was reading week and group members were not in contact during that time.
24 Feb 2023 - Deciding on a microcontroller board.
Why was the change suggested?
There are many microcontroller boards out there that are close to being the same because Arduino made their boards open source along with their coding. After originally choosing a different brand board it was decided to use an official "Arduino Uno Rev 3" for coding ease and online suggestions.
Who suggested?
Jamie after doing additional research because of the number of different microcontroller boards available.
14 Feb 2023 – Switch to using a microcontroller in the body temperature sensing circuit.
Why was the change suggested?
Could not find any information on how to build the circuit without using a microcontroller because they are quite cheap and couldn’t find even a single sample of how to build the circuit without a microcontroller.
Who suggested?
Jamie suggested when parts research gave no alternatives.
01 Feb 2023 - Change from the LM358 chip to using a 555 chip for the timing portion of the circuit.
Why was the change suggested?
To make for easier technical circuit design the 555-timer chip seems simpler to use.
Who suggested?
Sangyeop suggested after talking with Professor Hegger and doing some research.
31 Jan 2023 – Change from using a replaceable bottle of sanitizer to a fillable tank.
Why was the change suggested?
To simplify the design having a replaceable bottle introduced complications with the threads on the bottle. To reduce the cost of the pump by having a submerged pump.
Who suggested?
Jamie suggested this change during the initial sketch designs.