# Title Team Members TA Documents Sponsor
31 Enhanced Beverage Coaster
Christina Choi
Harrison Hsieh
Hung-Jui Chang
Nicholas Ratajczyk appendix0.pdf
We are want to design a beverage coaster that has the ability to detect when drinks are low and capture data on drinking habits. We believe our project will be useful for restaurant workers because they will be able to spot near empty glasses more easily (especially in a dark environment), and they will be able to track how much of each beverage is usually consumed by customers.

Our enhanced beverage coaster will detect the amount of beverage left in the glass by using a pressure/weight sensor and will light up an LED to a certain color to make it easier to restaurant workers to spot near empty glasses. Also, we will be tracking the amount of beverage consumed by the customer using the pressure/weight sensor. Our coaster will also have a wireless chip that will relay data to a central location (probably a phone or computer for this prototype). We plan on probably using a coin cell battery to power out project.

We believe this project is challenging because it needs to be not too expensive, low power, and have the ability to transfer data wirelessly. Also, detecting the decrease in the amount of beverage in a glass can be tricky due to the glass being picked up in uncertain intervals by the customer.

-Pressure sensor working
-Able to detect a near empty glass
-Replay amount of beverage drunk by customer somewhere (probably phone)

The Dream:
-All of the above working
-Have a central module to transfer information to
-Able to select type of beverage before serving customer

Interactive Proximity Donor Wall Illumination

Sungmin Jang, Anita Jung, Zheng Liu

Interactive Proximity Donor Wall Illumination

Featured Project

Team Members:

Anita Jung (anitaj2)

Sungmin Jang (sjang27)

Zheng Liu (zliu93)

Link to the idea:


The Donor Wall on the southwest side of first floor in ECEB is to celebrate and appreciate everyone who helped and donated for ECEB.

However, because of poor lighting and color contrast between the copper and the wall behind, donor names are not noticed as much as they should, especially after sunset.

Solution Overview:

Here is the image of the Donor Wall:

We are going to design and implement a dynamic and interactive illuminating system for the Donor Wall by installing LEDs on the background. LEDs can be placed behind the names to softly illuminate each name. LEDs can also fill in the transparent gaps in the “circuit board” to allow for interaction and dynamic animation.

And our project’s system would contain 2 basic modes:

Default mode: When there is nobody near the Donor Wall, the names are softly illuminated from the back of each name block.

Moving mode: When sensors detect any stimulation such as a person walking nearby, the LEDs are controlled to animate “current” or “pulses” flowing through the “circuit board” into name boards.

Depending on the progress of our project, we have some additional modes:

Pressing mode: When someone is physically pressing on a name block, detected by pressure sensors, the LEDs are controlled to

animate scattering of outgoing light, just as if a wave or light is emitted from that name block.

Solution Components:

Sensor Subsystem:

IR sensors (PIR modules or IR LEDs with phototransistor) or ultrasonic sensors to detect presence and proximity of people in front of the Donor Wall.

Pressure sensors to detect if someone is pressing on a block.

Lighting Subsystem:

A lot of LEDs is needed to be installed on the PCBs to be our lighting subsystem. These are hidden as much as possible so that people focus on the names instead of the LEDs.

Controlling Subsystem:

The main part of the system is the controlling unit. We plan to use a microprocessor to process the signal from those sensors and send signal to LEDs. And because the system has different modes, switching between them correctly is also important for the project.

Power Subsystem:

AC (Wall outlet; 120V, 60Hz) to DC (acceptable DC voltage and current applicable for our circuit design) power adapter or possible AC-DC converter circuit

Criterion for success:

Whole system should work correctly in each mode and switch between different modes correctly. The names should be highlighted in a comfortable and aesthetically pleasing way. Our project is acceptable for senior design because it contains both hardware and software parts dealing with signal processing, power, control, and circuit design with sensors.

Project Videos