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60 Automated Tea Brewing Thermos
Danny Yi
Joseph Niemerg
Vincent Murphy
Nicholas Ratajczyk design_review
Our project for this class will be an automatic tea making thermos. This thermos will have two different mechanisms to control tea brewing. One of which controls the steeping temperature of the tea you would like to brew. Using a simple switch or a Bluetooth connected device, we can choose to steep at two different temperatures, since there are only two major temperature points used in brewing the common teas*. In addition to this there will be another control for switching between weak, medium, and strong tea. These features are built referencing a guide for tea*. To achieve these basic features a RTD temperature sensor will be added to the inside of the thermos between the outer wall and inner wall of the thermos to check if the steeping temperature has been reached. There is no need to regulate this temperature either, since most steeping temperatures come with a wide enough range where thermal loss considerations are not needed. In addition, a timer will be pre-set, based on user input, for how long to steep the tea based on the saturation level desired. To automate this process these sensor inputs will be conveyed to a motor that will raise and lower the teabag into the water like an anchor. The motor will attach itself to the teabag string with a clip to account for the variations of tea bags. The microcontroller, PCB, and motor will be mounted onto/into the handle to keep the water and heat away from the electronics. With the centralized location to the side of the thermos we plan on building a waterproof enclosure with the use of rubber gaskets, and epoxy to allow for partial submersion under water for hand washing. This design also takes mobility into consideration and allows you to carry the mug wherever you go. We are going to add a heating unit to the bottom of the thermos which will contain a pair of nickel-chromium wires which will serve as heating coils. Their heating output (voltage across coils) will be determined by the micro controller. Once the selected tea and strength have been selected by either the switches or your Bluetooth connected device the thermos will be turned on and heat up to the desired temperature then shut off its heating coil and begin brewing. Once it has finished brewing the controller will provide an audible ding for the user. In addition, the user will be able to follow three LED lights to see what stage of the brewing process the tea is in. (heating up, steeping, and finished). Lastly the user can view a temperature readout display to see what the current temperature in the thermos is. All of this will run on a Li-ion battery which will also be mounted onto the side of the thermos and be rechargeable.


Assistive Chessboard

Robert Kaufman, Rushi Patel, William Sun

Assistive Chessboard

Featured Project

Problem: It can be difficult for a new player to learn chess, especially if they have no one to play with. They would have to resort to online guides which can be distracting when playing with a real board. If they have no one to play with, they would again have to resort to online games which just don't have the same feel as real boards.

Proposal: We plan to create an assistive chess board. The board will have the following features:

-The board will be able to suggest a move by lighting up the square of the move-to space and square under the piece to move.

-The board will light up valid moves when a piece is picked up and flash the placed square if it is invalid.

-We will include a chess clock for timed play with stop buttons for players to signal the end of their turn.

-The player(s) will be able to select different standard time set-ups and preferences for the help displayed by the board.

Implementation Details: The board lights will be an RGB LED under each square of the board. Each chess piece will have a magnetic base which can be detected by a magnetic field sensor under each square. Each piece will have a different strength magnet inside it to ID which piece is what (ie. 6 different magnet sizes for the 6 different types of pieces). Black and white pieces will be distinguished by the polarity of the magnets. The strength and polarity will be read by the same magnetic field sensor under each square. The lights will have different colors for the different piece that it is representing as well as for different signals (ie. An invalid move will flash red).

The chess clock will consist of a 7-segment display in the form of (h:mm:ss) and there will be 2 stop buttons, one for each side, to signal when a player’s turn is over. A third button will be featured near the clock to act as a reset button. The combination of the two stop switches and reset button will be used to select the time mode for the clock. Each side of the board will also have a two toggle-able buttons or switches to control whether move help or suggested moves should be enabled on that side of the board. The state of the decision will be shown by a lit or unlit LED light near the relevant switch.

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