Sweetbud Info
December 01, 2017

Hi there!

Here's a ton of information about our newest product, Sweetbud. Read at your own risk 🙃

Who are we?

We are Team Sensetrick, two high schoolers from Los Angeles and Toronto. We met each other through attending hackathons across North America and found shared interests in hardware, augmented reality, and coffee!

The Problem

North Americans consume a large amount of sugar every day due to the food culture that we embrace. Sugar has proved extremely harmful though, and it can cause diabetes, obesity, and heart disease in the long run. Sugar is also extremely addictive, so it’s difficult for a person to get rid of the flavor of food that he/she grows up with. There have been attempts to replace sugar with chemical substances, such as in Diet Coke. However, artificial sweeteners are still not healthy. Thus, we decided to look for a brand new approach to address this problem. We focus on coffee because it is the most common beverage that we drink and put sugar into, and a significant part of our daily sugar input. Sweetness is crucial to North Americans because of coffee’s bitterness and the extremely high sugar levels in the coffee sold at the likes of Starbucks and Dunkin Donuts. This raises the question can we reduce our daily sugar input while enjoying the same flavor?

Here comes Sweetbud

SweetBud is a coffee lid that simulates the taste of sweetness. It uses non-invasive electrical currents to stimulate your tongue, and thus trigger your neural system to believe you are tasting something sweet. With SweetBud, users can taste sweetness without adding any sugar into their coffee. It is an independent portable system that you can install on almost all coffee cups, and comes with a mobile application to adjust sweetness intensity and track your sugar intake reduction. Sweetbud is a first-of-its-kind sugar replacement solution and one the few augmented taste applications.

We have an initial prototype which can simulate sweet-sourness and we are conducting more research on finding a more realistic sense of sweetness. We are currently developing a portable prototype and a mobile application.

So... how does it work?

Sweetbud uses Augmented Taste technology, a field that has not been thoroughly explored yet. One of us once accidentally put a powered Arduino in our mouth and realized it tasted like a sour raspberry. That inspired us to look into augmenting taste through electrical current. After doing some research and experiments, we found it is possible to stimulate the tongue to create a digital taste interface. On Sweetbud, we created circuitry that stimulates the tongue with non-invasive electrical current and could simulate some extent of sweet and sour taste.

First, attach Sweetbud to any coffee cup filled with black coffee (most standard coffee cups that you get from Starbucks, Peets, Tim Hortons). The lid will lock onto the cup tightly.

Press the button on the back of Sweetbud to turn it on. When you lift Sweetbud up, the accelerometer in Sweetbud will automatic start generating sweetness. Lay your tongue under the mouthpiece and the electrical current will start stimulating your tongue smoothly. You can drink in the coffee through the mouthpiece while sensing the sweetness it generates.

Sweetbud is also designed to be waterproof and rechargeable. We are also developing a mobile app that you can connect your Sweetbud through Bluetooth. You can adjust the sweetness and intensity and track your progress in reducing sugar intake through the app.

So essentially, you can finally drink coffee without sugar but with the same sweetness!

Wait... How did you build it?

We used Adobe Fusion 360 to design the CAD files, Cura to slice, and a Prusa i3 printer to print the 3D model. We used Arduino microcontroller to control the circuit and regulate the taste and intensity. We also have an iOS app that we programmed in Swift and connected to the Arduino through Bluetooth Low Energy. We use Firebase authentication and real-time cloud database for the backend of the iOS app and data from Sweetbud.

We have been making many iterations since the start of November. We are improving the prototypes with smaller and more efficient electronics, more and more comfortable lid design, and test results from experiments. We aim to create a fully portable and embedded prototype in the next few weeks.

Since starting this project since November, we have been actively engaging with others to get feedback on our project. We surveyed friends and families regarding the issue of sugar and coffee and came up with the solution - Sweetbud. We also used Product Hunt Ship as a landing page and sent updates to our subscribers. We have been reaching out to people with professional backgrounds in hardware product development and have built a group of mentors that can mentor us to develop the product further. Please feel free to contact us and give us feedback and suggestions at hello@sensetrick.com!

Join our community and stay in tune for our latest updates! Learn more about Sweetbud: https://sweetbud.co/

Best,

Sensetrick Team 🛠

Ryan Hoover@rrhoover · Founder, Product Hunt
Wow, this is creative, @sierra. Truthfully, I feel like I'm getting trolled. Can electrical currents really simulate a sweet taste? Have you seen anyone else building a similar product using this approach?
Sara
SaraMaker@sierra
@rrhoover Hi Ryan, believe it or not, we’ve found that with the right frequencies, electrical currents can actually simulate different tastes (sweet, sour, spicy, salty, bitter, perhaps even more!). For Sweetbud, we’re currently able to generate a light sweetness with a bit of sour tang, which we’re trying to separate. Some research has been done before in this area, but not a lot, i.e. one other researcher in Singapore, so we have a wide range of possibilities we’re testing on our own :-)
Wojtek Witkowski
Wojtek Witkowski@pugson · Building digital products.
Wow, solving a very serious problem all around the world, especially in 🇺🇸️. This is simply amazing! Looking forward to your progress. Have you done any testing on the durability of the food-safe material used to print the lid? I'm wondering how it will hold up with warm liquid running through frequently.
Simon Zirui Guo
Simon Zirui GuoMaker@simonguozirui · Student Maker
@pugson Hi Pugson. We are currently using regular PLA and rubber testing with water for fast prototyping. Safety is a huge concern and we are getting food-safe PLA soon!
@sierra How does someone accidentally put a powered arduino in their mouth! For real? :) I'm always trying to cut down on sugar without having to resort to artificial sweeteners, so if you can get me over the fear of electrocuting myself, or frying my tongue, sign me up! Also, your instructions specify black coffee. Have you done any testing with black tea?
Sara
SaraMaker@sierra
@yamini Hi Yamini! Curiosity killed the cat but it didn’t electrocute us 🙂 Just kidding, it was an in-the-moment thing and we really didn’t expect anything to happen. And yes, Sweetbud is completely safe! We use noninvasive currents that can’t possibly harm you in any way. So far we’ve limited our testing to black coffee because that was our original problem, but we have high hopes for Sweetbud working with black tea, especially since it has a much lighter taste!
@sierra Nice! If you're looking for some beta "tasters" let me know :) I'm curious: in your tests, does everyone respond the same way to the electrical stimulation? Meaning, does the intensity of sweetness differ from person to person? BTW, having an app that can dial the levels up or down is a great idea. And perhaps your next product could be a spoon or fork that simulates salt for hypertension sufferers!
Sara
SaraMaker@sierra
@yamini Yes! We actually have an app prototype that allows users to calibrate Sweetbud, since everybody's taste buds work a bit differently. And great idea, although we're currently focusing 100% effort on sweetness so that may be further down the line
Artem Nedrya
Artem Nedrya@t9n_design · Indie Localizer
@sierra I'd happily beta "taste" as well, let me know (I'm in the USA)
Eli Natarajan
Eli Natarajan@eli_natarajan · Data Enterer
Very interesting stuff. I do pose the question, if I, or even yourself, were to invest in this device, why wouldnt I just invest in better tasting coffee? Since the investment in better tasting coffee, as in speciality coffee (not Starbucks, McDonalds or commodity coffees), would benefit others on a global scale (farmers, processors, etc). Bitter tasting coffee is a sign of bad roasting or brewing practices, and not really that inherent in well made coffee drinks or well roasted coffees. That being said people will still add sugar to even the best coffees, so its not a totally true that an investment in better coffee will change everyone. My other question to ponder. The ability to mimic sweetness through the device does not change the inherent need for sweetness, this is kind of like a band-aid over a wound that needs stitches, do you feel that this device could go the way of increasing an addiction to sugar? Or creating an addiction for the need for sweet things? I pose this second question in the light of things like Vaping, which are marketed toward reducing smoking, but people have just become addicted to vaping now. I love the idea of the device! Keep pushing the boundaries :D
Alfonso C. Betancort
Alfonso C. Betancort@abetancort · Shot, develop & print 300 rolls of film.
@Sierra Can it be done not as a lid but as a rim for an Italian type ceramic expresso coffee cup?