Project Proposal

Made by Yiyi Zou

Created: March 11th, 2018



My proposal for this project is to create a wearable with LED lights that react to wearer’s heartbeat. Last semester, I did a project where I used heartbeat sensor and Arduino to interpret user’s mood and play music that reflects it. I would like to extend the idea of interacting with users to wearables. I have seen wearables with sophisticated LED designs, but I haven’t seen many that can react to wearers’ emotions. 



I started by thinking about how to detect the user's heartbeat effectively. Based on my experience, it is best to place the sensor around the wearer's neck, so I chose a high-neck shirt to work with. The high-neck collar covers the sensor and makes sure it is touching wearer's skin.

I came up with two designs of LED lights. The first one uses the parallel curcuit structure we learned and practiced in class. The second one uses LED strips. I think the second design is easier and more straightforward to work with. There are multiple kinds of LED strips out there, including color-changing strips and water-proof strips. I want the strips to change colors according to wear's mood. For example, the lights will turn to red and start to flash when the wearer is nervous. 

The most challenging part is to find a way to control the lights. I used Arduino and a computer to  analyze heartbeat sensor's data last time, but it is impossible to use a computer this time. I found some kind of remote control for LED lights that works pretty well on wearables ( 



I found a picture of a LED t-shirt that's similar to my design. I also found detailed descriptions on how to make LED t-shirts on this website (



I think the hardest part of this project is to figure out a way to connect heartbeat sensor to LED control and analyze the data generated by the sensor. I found a website ( that teaches you how to make a headband reacting to wearer's heartbeat. I think using Arduino on prototypes is fine, but it is not practical to attach Arduino on a clothes in real life. There must be some other ways to build a smaller embedded structure that can control the lights according to wearer's heartbeat. I would like to investigate this furthermore. 


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