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Thank-you for visiting the COMM 386p Prototyping voting page!   These are some of the end-of-term projects by students.   The next round of the course will be offered in September 2016 [comm 386p-protyping, UBC]


Vote for the product you feel is the strongest for the following question:


“Based on the info below, which project ideas / prototype

 / team would you think would have greater success in finding

financial support and customers for their idea?”


You will get a different pair of projects each time you vote!







Drink&Drive – Problem exists

British Columbia – the province of beautiful cars and crazy parties. There are total of 3.3 mil drivers, who are driving cars on a daily basis in it. But did you know that almost 14000 drivers are violating drink and drive policies every year. In fact, on average, 86 people die every year in crashes involving impaired driving, which is equivalent to the 27% of car crash fatalities and remain the main cause of car crash fatalities in BC. This numbers are huge and they are actually growing every year. And while there are some ways to punish the violation of the rules, no one actually tries to prevent them from even happening.


Value Proposition

And here come SobaDrive (a.k.a Sober Driver). This is an integrated alcohol testing system, which allows you to run your car only after positive test result. It brings incredible value to both Drivers and Car Insurance and Regulation companies. For Drivers it helps to avoid tickets and driving prohibition; keep your friends and family save; do not gamble with your car insurance as it can be not liable for this type of accidents if it is not an extended version, and finally it just helps you to live longer! On the other hand, insurance and regulation companies, such as ICBC, save on costs associated with impaired driving accidents, help to avoid repeated accidents, and make overall driving process safer.


Technological solution

Let me introduce you Model #1. It is designed to fit your car glove box and can be easily accessed from it. Everything you need is take the tube and blow in it: green light and you are good to go, but if you got a red light your car engine won’t turn on and ICBC department will get a signal notice of your negative test result.

The next step would be do develop more compact version, which will be installed into your car key and will make its usage more comfortable.



Coin Sorter




image1Front side picture image3 image4 side picture 



Our coin sorter is a simple and clean object, which separates $1, $2, 50 cents, 25 cents, 10 cents and 5 cents. This coin sorter is built on simple physics principles. It separates the coins according to their dimensions. Compared to the coin sorters on the market, our coin sorter is relatively cheap. Our coin sorter sorts one coin at a time to reduce the chance of an error or coin stuck in between the box.


Audience and Purpose

The intent of our project is to substitute piggy banks, which are unable to sort and package coins automatically. Furthermore, since our coin can be constructed at a relatively low cost, we are able to add personalized letters or characters to appeal to customers who like having these extra personal touches to their purchases.


Original Thoughts on Our Prototype  

Our idea was inspired by one of our group members who has a friend that has always been bothered by having a bunch of coins and no way to sort them easily. This is because counting coins is a tedious task. This gave us a direction to head towards.


draft 2

The initial design (Figure 1.1) was to make something similar to a moneybox with five or six built in drawers. People can put many coins into the sorter at one time from the top with many holes and the sorter separates the coins into different drawers. However, we soon abandoned this idea, as it requires a lot of works and techniques that are beyond our capabilities.


Calculation draft

This forced us to revise our design (Figure 1.2). We added a tunnel to each drawer to let coins go through, and within each tunnel, there is a sensor used for counting. This keeps track of how many coins are in the moneybox. However, due to technical and time constrains, we had to discard this functionality. Other substituting functions, such as counting coins by having a weight sensor, or showing how much is in the moneybox by attaching a small electronic display on the top of the coin sorter, were also considered. Most of these ideas are not doable due to time and technical constraints.


Eventually, we settled upon a more practical design (Figure 1.3). As seen from Figure(1.4&1.5), we have five layers in total that help us to sort coins by their different  sizes and dimensions. The first layer is used to sort $2 as the hole is designed for $1 or anything smaller than $1. The second layer is used to sort $1 as the hole is anything smaller than or equal to the size of 25 cents coins.


We also have some additional functions:

  • l A ring bell
  • l A “FULL” sign that pops up when the coin sorter is full of coins 


We have made a small seesaw that supports the drawer and the “Full” sign. When the coins collection is large enough, the seesaw will yaw to the other side and the “Full” sign will come up and remind people  

To build this coin sorter, we created around 40 pieces. In doing so, we have done a lot of work measuring the sizes and dimensions to make sure they are precise. In other words, every single piece is produced in-house. In terms of the material, we use Acrylic and Birch Plywood for our prototype.



  Sampe CAD files 2 Sample CAD files 1




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