Project

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53 Magic Wands Battle Game
Teamwork Award
Jialin Sun
Manfei Wu
Shanoon Martin
design_document0.pdf
final_paper0.docx
presentation0.pptx
proposal0.docx
Description: We will build a magic wand that has tri-axis gyroscopes and accelerometers inside to detect the movement of the wand. If the detected hand gestures fit with one of the spells, it will emit an ultrasound and the player hits by this will have his game blood level decreased (it works like in Harry Potter!). We also need a microcontroller that connect all of the wands to the game center which keep tracks of score and decode the spellā??s gesture (received wirelessly). Another main component in the project is an general receiver that can be connected to tablets for UI display to enable score tracking. Also, player has the freedom to input additional spells besides those already hard coded to the game, so having a LCD display will be helpful for this interaction.
Since the gameā??s components are easy to carry and our gesture detection are not limited the range of camera, it will be a fairly easy to carry game. There is no game like this in the market besides laser tag.

Electronic Automatic Transmission for Bicycle

Tianqi Liu, Ruijie Qi, Xingkai Zhou

Featured Project

Tianqi Liu(tliu51)

Ruijie Qi(rqi2)

Xingkai Zhou(xzhou40)

Sometimes bikers might not which gear is the optimal one to select. Bicycle changes gears by pulling or releasing a steel cable mechanically. We could potentially automate gear changing by hooking up a servo motor to the gear cable. We could calculate the optimal gear under current condition by using several sensors: two hall effect sensors, one sensing cadence from the paddle and the other one sensing the overall speed from the wheel, we could also use pressure sensors on the paddle to determine how hard the biker is paddling. With these sensors, it would be sufficient enough for use detect different terrains since the biker tend to go slower and pedal slower for uphill or go faster and pedal faster for downhill. With all these information from the sensors, we could definitely find out the optimal gear electronically. We plan to take care of the shifting of rear derailleur, if we have more time we may consider modifying the front as well.

Besides shifting automatically, we plan to add a manual mode to our project as well. With manual mode activated, the rider could override the automatic system and select the gear on its own.

We found out another group did electronic bicycle shifting in Spring 2016, but they didn't have a automatic function and didn't have the sensor set-up like ours. Commercially, both SRAM and SHIMANO have electronic shifting products, but these products integrate the servo motor inside the derailleurs, and they have a price tag over $1000. Only professionals or rich enthusiasts can have a hand on them. As our system could potentially serve as an add-on device to all bicycles with gears, it would be much cheaper.

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