Dhyāi Sparsá by Simran and Krishnokoli




Dhyāi Sparsá is an immersive meditative device that is worn as a glove on the hand. The glove has vibrating points embedded on the chakra points on the palm, that help in the chakra meditation process.

Chakra based meditation is an age-old Indian tradition, which helps to soothe the mind, increase productivity, and has multiple other benefits. Traditionally located along the spine towards the brain, chakras are present in different parts of our body like our palms, feet, joints etc. Each point has its own benefits and is signified with a colour, form and raaga (sound tone).

This project is an extension of the Dhyai Drishti, which was a touch based Chakra meditative experience, using visuals and sound. The project was created during our Creation And Computation course, by Kate Hartman and Nick Puckett, in our first semester at OCAD.

Experience Video

Project Images



image: top – palm view, bottom – structure

Project Context

This project was inspired by several haptic and sensory driven meditation aid products. We have listed some of the most important references below.

1.Healy – Frequencies for life, https://globalfrequencynetwork.com/chakras/

Healy is a frequency based unique healing device that aids in holistic solution to pain, sleeplessness, anxiety and helps in creating an atmosphere of positivity and mindfulness. It is attached to the body with clips, that help distribute the frequencies to the wearer, aiding them in numerous ways.

2.Nadi X Yoga pants –  https://vimeo.com/251850319

Nadi X yoga pants is yoga pant created with woven technology which makes it easier for users to practice yoga alone. The yoga pants are wirelessly connected to the user’s smartphone and enables them to correct their posture if they do go wrong.

3.Salted, Smart Insole for golfers, https://www.salted.ltd/insole

Salted smart insole is an IoT-based wearable device and mobile app, which offers digital healthcare solutions to maintain “balance” in everyday life.  With Bluetooth, users can connect SALTED Smart Insole to the mobile app to assess their posture and receive personalised exercise recommendation.Embedded sensors that analyze user’s walking and gait patterns provide real-time feedback with 12 different vibration patterns. It’s chargeable, waterproof and sweatproof.

Project Code

While developing our project we, developed a version that has an LED matrix embedded on the top of the hand to visually indicate, others which Chakra the user is meditating on. The LED matrix changed pattern according to the symbol of the activated chakra. However, after further contemplation and discussion on the same, we decided, that meditation being a personal activity, we would not want to broadcast, the chakra to others, than the actual wearer, and hence removed it from ur final prototype. However, coding the LED matrix was an interesting experience. Below, are two code, one with and one without the matrix.

vibrating motors code

vibrating motors and LED Matrix code




Image: Top- circuit diagram, bottom – actual execution and wiring

Parts, materials and techniques


  • Arduino Nano 33 IOT
  • LED Matrix MK7129
  • Vibrating Motors
  • Push Buttons
  • Conductive Fabric
  • Jumper Cables
  • Conductive Thread
  • PCB Board
  • Copper Tape
  • Soldering Iron + Wire


  • Nonconductive thread
  • Needles
  • Glue Gun
  • Felt
  • Precision Knife
  • Scissors


  • The motors are connected on the points of chakras across the palm.
  • Conductive fabric is placed on the finger-tips, which are connected to the arduino to create digital switches. The conductive fabric on the thumb is connected to the ground pin, so that each specific mudra can switch on a motor, on the palm.
  • We have tried to use our learning from prototype 3 – digital switches for the mudra switch, prototype 5 – electronic textiles for creating our own custom breadboard and connecting it with conductive thread, and finally prototype 6 – haptic feedback for our vibrating motors.

Further Developments

We would like to create a bodysuit which would be wirelessly driven, and vibrations triggered by hand mudras will be vibrated across different points on the body, to help in meditation process.


LED Live Music Visualizer


Project Description

This live music visualizer aims to  provide a more interactive and entertaining live music experience for music lovers. I love music, and enjoy going to concerts, livehouse shows and listening to music at home. So I would like to make the experience of these music-related activities more interesting and interactive. The amount of neopixels on LED strips will be changed according to the frequency of the music. If every person in a concert or livehouse show puts on the LED music visualizer, they will be able to see the visualizer on the back of the person in front of them. Along with live music, the change of LEDs can provide a more immersive experience for users. It can also work at home. Individuals can put it upon the wall, play music, and enjoy the visualization. 

My prototype consists of four functional parts: LED strips, Arduino UNO, battery and sound sensor. There are 10 LED strips and each strip is composed of 6 neopixels. Each strip connects to another by wires. The battery is a 12V dry cell. In order to prevent damage to the circuit board, LED strips and the sensor, a 12V-to-5V converter has been used. The final prototype is in a backpack shape. It is made of non-woven fabric,  and there is a window to see the neopixels. I used semi-transparent TPU to make this window because I think it can slightly cover the strips, which affect the appearance of the prototype, and still can let the light of neopixels pass the window. Other parts are stored in a pocket under the window. Switching on the prototype, the leftmost LED strip will light up. Other strips are controlled by the frequency and loudness of the music. So the libraries used in this project are FastLED and ArduinoFFT.

Video of the interaction


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detail images


Arduino UNO, battery and converter are stored in this pocket.%e5%be%ae%e4%bf%a1%e5%9b%be%e7%89%87_20210416090001

I used non-conductive thread to fix the strips onto the non-woven fabric.%e5%be%ae%e4%bf%a1%e5%9b%be%e7%89%87_20210416090005The sound sensor.

Parts & Materials List

  • (1)Arduino UNO
  • (1)Sound sensor LM386
  • Wires
  • (1)One-meter long LED strip WS2812B
  • (1)DC-DC 12V to 5V converter
  • (1)12V battery
  • (1)Battery holder with button
  • Glue gun
  • Non-woven fabric
  • Translucent TPU
  • Non- conductive Thread
  • Solder Iron
  • Webbing
  • Buckle

circuit diagram




Project Context

My major research project is related to musical experience. So I would like to explore a multi-sensory way to participate in musical activity in this final project. 


The first inspiration was an audio visualizer using Arduino FFT by Chris Parker. It was made with ws2812b addressable LED strips controlled by an Arduino UNO. It was composed of a frame which was made with acrylic, plywood, and 3D Printed parts. The neopixels on the LED strips were controlled by the frequency and loudness of the music played. There were ten rows and ten columns of neopixels to constitute the colorful spectrum bands. The code of my project was based on this project, and I was inspired by his way of connecting LED strips — wires were soldered between strips, so I used the same approach to connect my LED strips. 


The second inspiration was the SubPac. SubPac is a tactile audio wearable device that transfers low frequencies directly to users’ bodies and provides them with a new physical dimension to the music experience. The SubPac allows users to feel the bass, like being in a live music show. It addresses the problem that hearing  intense bass for a long time may damage hearing and offers a more immersive experience for users. Furthermore, it can potentially help people with hearing impairment to enjoy music and prevent the sound from annoying their neighbours — they may hear music in a high volume in order to feel the vibration. I was inspired by the technological appearance and features of the SubPac. I intended to make a prototype that has both haptic and visual modules, however, my programming level was still not advanced and I lack the knowledge of how to translate frequency to vibration in code. So that will be the next step of this project.


The music to LED strip tutorial  by Yolanda Luque H. also inspired me a lot. This tutorial introduced how a RGB strip works, how to translate music to light and the idea of the code. Her LED strip changes its color according to different frequency bands. When making the prototype, I first tried this tutorial, to learn how to use an RGB strip to make a music visualizer. I used similar parts to build the prototype. However, the code didn’t work — The LED strip keeped glowing red even if I made sound beside the sound sensor. But though it was not a successful experience, it is good to know the knowledge of mapping and FFT.


The last thing that inspired me was the LED backpack. A LED backpack ofter has an LED screen, which can be controlled by bluetooth or an app, on its body. I liked the idea of putting the LED screen on the back and thought that if every audience in a live music show wore something like it would be a cool and more immersive experience.

Challenges & Successes

  • The lack of programming knowledge prevent me from making a prototype with haptic components.
  • The solder joints on the voltage converter keep peeling off and wires are easy to break.
  • The sensitivity of the sound sensor is not adjustable. So the music have to be played out loud if I want to see the change of the spectrum composed by neopixels.
  • The appearance of the final prototype looks well and the circuit works well.

next stepS

  • Learn more about how to translate frequency to vibration. Add vibrating module to the prototype.
  • Change sound sensor to an adjustable one and improve its sensitivity.


Yolanda Luque H. (2020, August). Music to LED strip tutorial (using the Fourier Transform). https://medium.com/@yolandaluqueh/music-to-led-strip-tutorial-using-fourier-transform-3d203a48fe14

Chirst Parker (2020, July). Easy Audio Visualizer Using Arduino FFT. youtube.com/watch?v=OPvW9lefkqE&list=LL&index=1&t=605s

SubPac. https://subpac.com/






The concept emphasizes the aesthetics of a fashion accessory, in this case a small purse, which is handy to carry a phone and a wallet. I put attention on the size, colour combination, material, and design. Other design component was sending a message about caring for our planet, a message that appeals to us in our role as guardians of our dear earth, to be more conscious, accountable, and respectful of our natural environment. A phrase made of letters which were built with 3 mm LED lights. “Because there is no planet B” is placed outside at the front of the purse, lights will be activated by the sound pressure level. Sound pressure level is the result of the pressure variations in the air achieved by the sound waves, and it depends not only on intensity of a sound, but also on the distance to sound source.

The message will be displayed in five lines of text that will turn on in sequence line by line, one at a time. The message is activated by sound to a certain level to a certain distance, the level used to activate lights is the one produced by a person saying “hello” at a distance of around two meters. Once lights are activated, lights will turn on line by line and fade off once all lines are on. This process will be repeated five times until, and during this time the sound sensor is not read. Lights can be activated again once the process is completed and lights are off. The idea behind is that when two people meet and salute each other the message will go on, this could be a nice way to start a conversation about our environment.

This purse could be used anytime, it could be casual or more dressy, depending on how it is accessorized. Brightness of lights is good enough to be seen during daytime.

This purse could be appealing to an environment-friendly person who wants to disseminate this type of message and possibly to anybody. This concept is based on:

Material: this purse is made of alpaca, a natural fibre I am familiar with. I have used this fibre to make scarves, hoods, and sweaters; but this time I am expanding and experimenting by making a purse.

Uniqueness: this purse is easy to make. It requires basic needle skills that most people can do. This is a unique piece that could be made and customized to anyone’s taste.

Convenient: the size has enough space to place a cellphone and a wallet. Although sizes could vary according to personal preferences.

Allied with sustainability and ethics: as a designer, I am trying to select a fibre and/or fabric that is made following ethical protocols, which means a fair treatment of the animal and a fair treatment of the people that produces the material. In this case, it is an artisanal alpaca fibre made in a Peruvian Andean community. This was a hand-made item.

I am conscious and concerned of the side effects of tech wearables on sustainability, in this case using LED lights in my project. As Gurova (2020) states, there may be a negative impact on the environment, such as an increase in energy consumption by using electronics and an increase of e-waste from abandoned devices. On the other side, Gurova concludes that the side effect of tech wearables on sustainability need to be further explored, because wearable is a broad technology and they could have different life cycle processes.

Sustainability is also a very complex concept, especially when the world is changing so fast, and many innovations are arriving that we could not even imagine few years ago. For Fletcher and Grose (2012, p.10), changes in the sustainability process in fashion come more from individual actions than from an international declaration. For example, I agree that being accountable or responsible is a more powerful approach than being sustainable, because it seems more achievable something that depends on us that something that depends on someone else. The message for me is to develop and use electronic wearables in a careful and responsible manner.


Regarding my inspiration sending messages using letters and lights I was inspired by neo-conceptual artist Jenny Holzner (Kemp, 2015, p. 219-220). Her work focused on delivery of words and ideas in public spaces, she used LED as a media to express her writing and political opinion.

I also was inspired by the phrase “Because There is no Planet B” that belongs to an organization of the same name (https://becausetheresnoplanetb.com/) that inspires people to look after our planet. I think this phrase maybe be overused, but I think it is still interesting to use it in my project because it is a short statement that fits on this purse size and it is powerful.

Another inspiration was how to build letters made of 3mm LED lights. I found a YouTube tutorial DIY How to make led letters, that was very handy and help me build letters for this project. During this term, when I worked on my projects I tried not to use the soldering iron, because I had never used it before and hesitated to use it, but in this project I used it a lot.

I was looking for similar projects for inspiration, [see reference], I found handbags with interior lights that activated when the handbag was opened to help user to find items inside the bag. I could not find something similar to what I have in mind.

I found a project that I liked very much after almost completing this project. It was “The Sessile Handbag” by Grace Kim (Hartman, p. 449). After my final critique-presentation I wanted to add interactivity to my project. I was checking different resources and I found a beautiful handbag project in Hartman’s book. I appreciated the artist mix of technology, LED lights in natural shapes, where lights fade on and off, creating a subtle effect. This project is similar in some way to my idea of natural shapes, handmade purse and using LED lights. The difference is in the reason to use light, in my case mine is sending a message.

The next handbag I will talk about is a waterproof backpack, maybe related to my work in the sense that through an LED screen animations, custom images and text are sent. My project sends one message, a bright environmental message activated by sound pressure through an interactive sensor built-in on the board I am using [Circuit Playground Express]. This backpack has a different concept, it is more to stand out from the crowd and lights go on when connected to power. It seems there is not interactive sensor, besides it appeals to school and travel wearers with room space to carry a laptop.

After delivering my prototype for this final assignment, a project called my attention. It was the TagURIt (Pailes-Friedman, 2016, p. 078), an electronic game of tag that works with proximity sensors. I wanted to add this type of sensor to this project, but I did not have enough time to order it. The idea was that when someone was close to the purse, LED lights will go on. Instead of that, I used sound pressure level, which is affected not only by the strength of a sound but also by its proximity. It was not exactly a proximity sensor, but somehow could detects when a person gets close and say something, a greeting or something else. The tone of the voice can not be that of a whisper, but more a normal tone of voice to a distance of around two metres.



At Noon: https://youtu.be/FGUL5X_CvrE

At Night: https://youtu.be/CAK0kScVTXw





Purse being worn during daytime: https://youtu.be/tkH1c1E1b-o

Wearable being display on a chair: https://youtu.be/ToYv7J9OCEk




Here welding letters together to make a word.


Here I am testing a welded word. I tested after welding each letter, to avoid having to redo the whole word.


Video checking the circuit: https://youtu.be/VNJ16XNgI1k


Welding wires to Circuit Playground Express.



Here the battery and its USB charger jack.




Materials, Parts and Tools

  • Pink alpaca fibre – my owm material, alpaca fibre from Peru
  • Grey alpaca fibre – my own material alpaca fibre from Peru
  • Knitting needles – I have at home
  • Recycled trims – I have at home
  • Adafruit’s Circuit Playground Express – Elmwood Electronics –
  • No conductive fabric – I have at home
  • Conductive thread bobbin – Elmwood Electronics
  • Needles – I have at home
  • 3mm LED lights – approximately 276 Led’s lights – Amazon
  • Soldering Iron Station – Hakko FX-888D – Canada Robotix
  • Solder – Amazon
  • Silicone electric wire – Amazon
  • Steel fibre – Kate Hartman
  • Lithium-Ion Polymer Battery 3.7v – LP503562 – Elmwood Electronics
  • USB Charger Jack for the Lithium-Ion Polymer Battery

Circuit Diagram

Outside of the handbag:

All letters in a line are connected to a positive (in red), which will be connected to a “pin” in the Circuit Playground Express. All the negatives (in black) will go to a single line that will be connected to a negative “pin” in the Circuit Playground Express board.


Inside of the handbag:

There will be five “pins” in the Circuit Playground Express board for light switches (in red). All negatives (in black) go to a GND “pin”.



The process started building the circuit and making the letters. LED lights were welded to make letters and then letters were stitched on the purse to make words and lines. Letters on each line were connected using conductive thread and steel fibre

The message is going to have five lines made of welded LED lights and lines will light up in sequence starting from the top. Each line will have its own switch and the code will manage time for each switch, so lights turn on in sequence (the first line will go on firsts and the next line few milliseconds later, and so on). Once lights in all lines are on, they will fade down until they go off and the process will start again.





The most challenging task for me was to use the iron soldering tool to create letters of 3 mm LED’s lights. I used old CDs to make letter patterns. I built 23 letters, each letter has in average 10 LED’s lights, here my husband gave a hand with the soldering.


The other challenge was the connectivity. I sewed the letters to the purse and connected them with conductive thread to form words. Unfortunately, the connection was weak. Next, I added on top steel fibre, to make the connectivity more stable and stronger. I found my third line “is no” did not light up, besides the intensity of lights were not even and in some cases blinked.


The next step was to connect the letters soldering them to build words.



It was a great idea because the connectivity improved, it was not loose anymore, and the intensity of the light was stronger and visible during daytime, exactly what the guest speaker suggested after my final prototype presentation in class. I was concerned about having some wires showing in the outside of the purse, which would not look nice, but it was exactly the opposite. The words connected properly and the arrangement looked like jewellery. See below.


I realized that maybe my project did not have interactivity. The interaction I thought of was a manual switch to activate the LED lights, but that was too old fashioned. I thought initially in using a proximity sensor to activate light cycles when a person was close to the purse. Unfortunately, I was using Adafruit’s Circuit Playground Express and this card did not have a proximity sensor on board. Finally, I found the Circuit Playground Express had a built-in microphone with a library that was able to measure sound pressure level. I decided to use the sound pressure level as a digital switch, to activate lights when values went over certain level. To find the level that would be the threshold value for the switch, I used the sound pressure level example that ships with Adafruit’s Circuit Playground Express library and the serial plotter tool in Arduino’s IDE to figure out a value generated by the voice of a person to a distance of around two meters. This value allowed me to develop a switch that was neutral to background noise.



I am very happy with the outcome of this project, although there is always room to improve. For example, the connectivity is good, looks nice and the intensity of the light when activated is great, but I am concerned that placing this letter blocks on top of the purse could tangle with a wool sweater, especially a person is wearing a wool sweater that matches the handbag. In the end, I think there are fashion accessories for each occasion, same as shoes for each occasion, there are purses for each occasion. This project could be extended to different items: a canvas bag, a backpack, a top, jacket, there are many possibilities.


DIY How to make led letters https://www.youtube.com/watch?v=dgYF1rjZwzY

DIY Leather bag with inside lighting https://www.youtube.com/watch?v=ID4A1r4uiW8

Fletcher, Kate and Lynda Grose (2012). Fashion & Sustainability Design for Change. Lawrence King Publishing Limited.

Gurova, Olga. (October, 2020). Sustainable Solutions for Wearable Technologies: Mapping the Product Development Life Cycle. Sustainability, 12, 1-26. https://www.mdpi.com/2071-1050/12/20/8444/pdf

Hartman, Kate (2015). Make Wearable Electronics. Design prototype and wear your own interactive garments. Maker Media Inc.

How to Make: Light-Up Tote Bag | The Fridge-Light Bag

Kemp, Martin. (2015).El Arte en la Historia [Art in History] (A. Ferrer, Trad.). Turner Publication S.L.

Pailes-Friedman, Rebeccah. (2016). Smart Textiles For Designers. Inventing the Future of Fabrics. Laurence King Publishing.

Purse Light with GEMMA & LED Sequins

Team’s flexible micro LEDs may reshape future of wearable technology


E-Textile Alpaca Weaving by Hortensia


In this project, I am trying to explore electronic textiles with alpaca fibre through weaving. From the class resources provided to us, I am interested in creating a textile circuit board, which for me is a to do task, I will try to do on coming project. In this assignment, I will present an e-textile prototype that I weaved with a little embroidery on top.


Parts & Materials List

Three sets of fairy LED lights
Ten yellow LED lights
Silicone Wiring
Arduino Nano 33 iot
Jumper wires with alligator clips on one side

Circuit diagram



See here

Prototype Development

Below the sketch of the weaving sample.


I did a loose simple weaving using two alpaca color wool: beige and light gray, I used a broken branch as a “loom”.


I embroidered a flower button in yellow and for the receptacle I used Peruvian natural cotton. I tried to find some nice colour combinations.


Below it is the final piece, the idea was to try to see how to create an e-textile using alpaca. I do not want lights compete with the weave, my goal is to enhance the beauty of the weave with the light. Later I could use this approach and weave lights in an outfit, like an alpaca poncho for example.


I used three set of white fairy lights and weaved them with the wool, I did this because the fairy light cord colour matched the alpaca wool color, light gray, in colour and size.

Small LED’s did not compete with the weave on the flower button and the tone of the yellow LED lights matched quite nicely. I would have preferred using Lilypad LED’s, because they are sewable and easier to use, but I did not like the look, they covered the embroidered part that I wanted to show. The option was to use simple LED lights, that fitted inside the embroidered flower button that matched the textile texture. When weaving the fairy light sets, I left the flower lights on before removing the batteries, that helped me guide the distance between lights (see below).



There are two fade effects, one going from high to low and the other from low to high. Two sets of fairy LED lights have one effect and the other the reverse effect.



Each led light on the button flower has an individual connection positive and negative because I wanted to turn them on and off in a sequence, as you could appreciate on the picture below and the YouTube video.




I am happy with the e-textile outcome. It would be interesting to try it on an outfit like a poncho or cape. Although I did not try on alpaca fabric, I think this type of lights will work well too.

My reflection about this project are, I found I need to improve how to connect the LED lights to the circuit. It was a little hard to connect the ten LED lights individually to the circuit, in a small space like the button flower. My idea is to use a printed circuit using conductive paint on a piece of neoprene, having the lights installed before the whole piece is sewed behind the back of the flower, having LED lights legs long enough so they can go through small holes in the weave.

Incorporating fairy lights into the weave went smoothly. Additionally, the color of the string matched the colour of the weave, light gray, and the size and colour of the lights was a good complement to the weave piece.




It was interesting to get started with e-textiles. I feel I still have a lot to learn and this is a field I would like to explore. I watched the links and resources provided to us in the course web site, the ones that called my attention were the E-Textile specifically the “Experimental Weaving” at the Unstable Design Lab, University of Colorado. I also liked the “Handwoven White Led Display and Hand Embroidered” at Studio subTela and the “Dear Data Project”.

I enjoyed the key speaker Laura Devendorf at the Symposium for Computational Fabrication 2019 (“Fabricating (Smart) Textiles – Computational Design, Craft, and Radical Possibility”). It was very inspiring to me. She uses design as a mean to critique design and does research on how technology shapes relationship to the world around us, more specifically how fabrication shapes our relationship with material. Super interesting.


Piggy bank sensor by Nishu

1 2 3 4 5 6 7

Arduino code:




Erin St BlaineReBoots Animated LED Boot Laces, https://learn.adafruit.com/re-boots-animated-dancing-boot-laces

Tony DiColaFestive Feather Holiday Lights, https://learn.adafruit.com/festive-feather-holiday-lights

Anne BarelaTrinket / Gemma Blinky Eyes, https://learn.adafruit.com/trinket-gemma-blinky-eyes

Rachel Fagan, Glow Pillow with Force Sensing Resistor, https://create.arduino.cc/projecthub/rachel-fagan/glow-pillow-with-force-sensing-resistor-904229


Weighing Bag

 Material List

(1)Conductive thread

(1)Crochet hook


(3)Alligator clips

(1)Button battery


%e6%9c%aa%e6%a0%87%e9%a2%98-1-01-01-01 %e6%9c%aa%e6%a0%87%e9%a2%98-2-01-01-01 %e6%9c%aa%e6%a0%87%e9%a2%98-3-01-01-011613092457871

For more detailed tutorials of crochet, please see https://www.thesprucecrafts.com/how-to-crochet-for-beginners-979092

Circuit Diagram



My LED Basket Handbag


My Prototype 3: Digital Switches for Embodied Interactions My LED Basket Bag

I decided to use a basket bag to experiment the prototype of three switchers which are activated through the use of LEDs. There are two body environment switches such when someone hold the basket bag handles and fairy lights become activated, and when the bag is opened a switch located at the bottom of the bag activate LEDs place inside the bag. The other category I can call clothing gesture because the bag has a button that helps to lock up safely through a loop, then when bag is close with the loop LED’s light are activate by a switch

Circuit Diagram

We have three circuits for the digital switches –red, blue and yellow, each of them representing a set of lights, the yellow representing a set of fairy lights– and three circuits to power the LED lights. Pins D2, D3 and D4 are used for the digital switches and ports D11, D12 and D13 are used to power the LED lights. Of course, this diagram is a simplified version, because the wiring inside the handbag depended on space and positions of switches and LED lights (we use sets of light for every switch and the wiring had to satisfy these requirements).

Here detailed hand made diagram of the wiring for each switch.

Arduino Source Code
Code can be found in GitHub (see here).


A. Handle: Body/Environmental Switch

When a person holds the handbag by the handle, the handle will be illuminated with a strip of fairy lights. When the user releases the handle, the light will go off.
The switch was made using copper adhesive tape, which is wired to an board mounted on a using flexible wire. To make the bridge I used copper tape and a red cloth where I adhered the tape and when I hold the handle with this cloth the bridge activated the circuit and switch then lights were on. The Arduino card and all the connection were place inside the basket bag.


Overall, all the switches worked well, although there are some reflections which are applicable to all three switches because they use similar materials and have similar connectivity. First, I do not like the connections are so visible, I would like to something more subtle, but I am still learning and prefer to be more comfortable with connections that the appearance for now, but this look bother me
About the wiring and switches can be further refined, copper tape is easy to manipulate plus its flexibility helped me to attach to a surface such the basket which is hard but not enough to keep stick in place, sometimes the tape didn’t stick well and if I moved the basket so much the connectivity could get lost and stop working, maybe using conductive fabric could be a better option.
Another point perhaps is the use of a full-size breadboard and the Arduino Nano 33 IOT
This bord is large and with the battery connected are heavy to place inside the bag. Maybe using the Adafruit’s Circuit Playground Express would have been better, but I think using the Arduino Nano to make this prototype is probably fine, but it is good I can realize about what I like and what I do not like to make better choices for my final work.

Material used in this prototype

Arduino Nano 33 IOT
Adhesive copper tape
Fairy Lights
Rechargeable 5V battery
Stranded wire cover with silicone
Basket Bag
Piece of red cloth





See full video here.

B. Button Up: Clothing/Gestures Switch

The handbag is “locked” with a loop and a button. When a person closes and locks the handbag by placing the loop around the button, two LEDs at the centre exterior surface of the handbag will go on. When a person opens the handbag by releasing the loop around the button, the exterior light will go off. The connections were using copper tape and stranded wire cover with silicone because was very thin and flexible. The switch was located along the loop then when the bag was button up the contact between the button and loop activated the switch and LEDs were on.




These reflections are almost the same I stated above on the handle switch, all the switchers used similar materials and have similar connections. First, I do not like the connections are so visible, I would have preferred something more subtle, but I am still learning and prefer to be more comfortable with connections than the appearance for now, but the look still bothers me.
About the wiring and switches, they can be further refined. Copper tape is easy to manipulate and its flexibility helped when attaching to the basket surface. However, the continuous movement of the bag caused the tape to move and, in some cases, detach from the basket surface, which caused loose connectivity. Again, definitely using conductive fabric could be a better option.
Another point perhaps is the use of a full-size breadboard and the Arduino Nano 33 IOT. That plus the battery was large and heavy to place inside the bag. Maybe using Adafruit’s Circuit Playground Express would have been a better alternative. I also need to do more research about the wireless options available in the Arduino Nano, which may help reduce some wiring. I am happy with the outcome, but not so much with the visible connections.
In terms of usability, I think it would be better to reverse this switch. The idea is that if a handbag is unattended and somebody opens it, a LED light will go on as some kind of alert. I would also like to add a sound, but that required to a speaker to the configuration which I still do not have. Another option would be to send a message to a device (a phone), but that would require an application listening.

Material used in this prototype

Arduino Nano 33 IOT
Adhesive copper tape
LED lights
Rechargeable 5V battery
Stranded wire cover with silicone
Basket Bag
I use practically the same material for all the three switches, but here instead of fairy light I used LEDs



See full video here

C. LED’s Inside Basket Bag: Clothing Gestures

When a person opens the handbag, a set of lights will go on to illuminate the interior of the handbag. When the handbag is closed, the set of lights inside will go off.
It is always handy to have light inside a handbag if the owner is looking for something inside. The circuit in this prototype was build in a similar way than the other two switchers. Here the switch is placed at the bottom of the handbag, then when the handbag opens the upper and bottom part of the handbag activates the switcher. The copper tape makes contact and LEDs go on.




Overall, the switch worked well, similar reflections that I made for the previous prototypes applied here too. There is also room for improvement, my big take here is to use conductive fabric and a smaller board like Adafruit’s Circuit Playground Express.

Material used in this prototype

Arduino Nano 33 IOT
Adhesive copper tape
LED lights
Rechargeable 5V battery
Stranded wire cover with silicone
Basket Bag


See full video here



See full video here

Traffic Control Wristband



Traffic Control is a very necessary but difficult job, especially due to the harsh weather conditions, anywhere in the world. Lack of integrated lighting systems and heavy gears add on to the professional hazard for traffic controllers everyday. While reflective clothing is very effective in such circumstances, an additional lighting mechanism could improve their signalling and visibility to vehicles on the road. Designing an integrated wrist accessory for easy traffic control was the initial concept behind conceiving this project.

The wearable is a simple wristband with 2 finger attachments. The wristband holds the LEDs, which can change patterns depending upon the signal the controller wants to display. Currently, the wearer can only display 2 signals – ‘Blink’ (Stop) and ‘Direction’. The device has an auto turn on/off. It functions only in the absence of sunlight, hence conserving energy.

The device runs on Arduino Nano 33 iot. A touch sensor and photo resistor are also added to the circuit. The touch sensor help detect the wearer’s haptics, and change the lighting patterns accordingly. The photo resistor which sits right on top of the wristband, helps detect the sunlight, allowing the device to turn on/off without any physical stimuli.

While the idea was to design a product which could be extremely lightweight and sleek, integrating well with the wearer’s uniform, currently the primary prototype is bulky and wired. More research and development will be required to make a more compact version of the device so that it could be easily worn everyday.

Experience Video

Idea and Process






Link To Code



The primary idea behind the project came from a small road trip to the outskirts of my city. While travelling back home, at night, the traffic controllers  in the crossings wielded red and green traffic control batons. Hence, I thought of integrating the lights onto the arm through a small LED lit wristband that would not involve holding an added accessory for long hours.

After coming up with an initial concept I decided to do some research on wrist wearables so that I could find some inspirations to carry out my project.

  • FingerTrack – useful

The first project that seemed very interesting was ‘FingerTrack’. It was developed by researchers from Cornell and the University of Wisconsin, Madison. They designed a wrist-mounted device that continuously tracks the entire human hand in 3D. The bracelet, called FingerTrak, can sense and translate the many positions of the human hand, including 20 finger joint positions, using three or four miniature, low-resolution thermal cameras that read contours on the wrist. The researchers added that the device could be used in sign language translation, virtual reality, mobile health, human-robot interaction and other areas. I find that the finger tracking technology could be really useful for my idea of developing the ‘Traffic Control Wristband’ without the use of touch sensors.

• MICA (My Intelligent Communication Accessory)

A project with a really interesting aesthetic appeal is the MICA. Developed by Intel, MICA has transitioned from the very androgynous aesthetic of ‘Fitbits’ and ‘Apple Watches’ to that of a High Fashion ‘feminine jewellery’.

•  Guardian Angel

Another example of a brilliant project with a little problematic aesthetic is ‘Guardian Angel’. This necklace has been designed by the agency – JWT Singapore. The concept for this product is very interesting and useful. A single click on the jewellery automatically triggers a call to a woman’s cell phone, so she has a convenient excuse to walk away from unwanted attention at public places. If things change from annoying to dangerous, holding down the button sends an emergency message to a friend with the victim’s exact GPS coordinates. Now, although usefulness of the device is no doubt really well thought out, the aesthetics of the jewellery makes it look like a silver insect. Also, there are mobile apps that enable the user to do fake calls to excuse themselves out of problematic situations.



I look forward to work further on this device and develop it into a more compact and user friendly wearable.


The Cut. “Can Opening Ceremony Make Wearable Tech Cool?” Accessed February 2, 2021. https://www.thecut.com/2014/11/can-opening-ceremony-make-wearable-tech-cool.html.

Cornell, Information Science. FingerTrak – a Wrist-Mounted Device That Continuously Tracks the Entire Human Hand in 3D, 2020. https://vimeo.com/440359313.

Hu, Fang, Peng He, Songlin Xu, Yin Li, and Cheng Zhang. “FingerTrak: Continuous 3D Hand Pose Tracking by Deep Learning Hand Silhouettes Captured by Miniature Thermal Cameras on Wrist.” Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies 4, no. 2 (June 15, 2020): 1–24. https://doi.org/10.1145/3397306.

Lee, Sid. Intel & Opening Ceremony | MICA Launch, 2014. https://vimeo.com/108266159.

“MIT: Wearable Tech: New Wristband Device Can Detect Emotions in Real Time – The Economic Times.” Accessed February 2, 2021. https://economictimes.indiatimes.com/magazines/panache/wearable-tech-new-wristband-device-can-detect-emotions-in-real-time/articleshow/58803657.cms?from=mdr.