LINGERFEEL#
Lingerfeel is part from the senses amplifying lingerie. Through the use of thermochromic ink, it invites the users to touch gently and create warmness in the body. While hands moving around the body, capacitive sensors detect the touch and reproduce it simultaneously in other parts of the body through vibration motors that amplify the touching sensation.
Design Process#
The Abobe collection is inspired in the 5 senses. Lingerfeel is searching to stimulate the sense of touch. The challenge was to develop a functional wearable with a sexy and elegant design that doesn’t interfere, but contributes, to the body perception.
To accomplish this, a design compound by stripes was developed to allow easy access for the hands, tongue or any other stimulus.
The design evolved into one piece to make easier the placement of the circuit but also to allow a cross interaction between sensors and actuators.
The piece is compound by a fabric printed with thermochromic ink. The black stripes hide a circuit of vibration motors and capacitive sensors without interfering with the skin to skin sensation.
The vibration motors were placed in an strategic distribution to stimulate erogenous zones. When the sensor “A” is touched the vibration motor “a” placed in the opposite side of the piece will vibrate. This crossed interaction has the objective to give an unexpected experience to the users and provoke curiosity and communication between them.
All together amplify the sensation of touch and expand arousement to the largest organ of the body: the skin.
Thermochromic Print#
Skin layers and cells at the microscope were used as inspiration to developethe print patterns.
Print 1#
This print was developed from a skin layers original photo.
- Import the photo into Adobe Illustrator
- Select the image and press “Trace Image” option. You can play with the amount of colors and styles to get different results.
- Press “expand” option to obtain the curves. Then you can choose the drawing that works better for you and modify as needed.
- Save as .dxf so you can work it in Rhino
- Open in rhino, select the drawing and use the “make 2d” option to get sure you will obtain close curves.
- Clean the curves with the “Rebuild” option to make them smoother and uniform. You can also play with the amount of points and degrees.
- Adjust the size with the “scale” option, with the “distance” tool you can make sure all the shapes in your drawing fit into a range of size that works for you.
Although the result was interesting, it is not the most adequate for laser cutting nor screen printing as the smallest the shapes can get is 2 mm and in proportion the big shapes were to big to be stetic.
Therefore I proceed to erase the biggest shapes, redistribute and repeat them until I get to the first image result.
Print 2#
This print was developed in Rhino with Grasshopper
- Draw curve in Rhino and select in Grasshopper
- Create a “Boundary Surface” and a “Bounding box” and connect
- Select the boundary surface and connect to a “Populate Geometry” to add points
- Make a planar voronoi diagram for the collection of points with “Voronoi”
- Scale uniform in all directions with “Scale”
- Bake
- Use the “make 2d” option to get sure you will obtain close curves.
- Clean the curves with the “Rebuild” option to make them smoother and uniform. You can also play with the amount of points and degrees.
- Adjust the size with the “scale” option, with the “distance” tool you can make sure all the shapes in your drawing fit into a range of size that works for you.
- Repeat and move the shapes to create the pattern
Here you can see a Voronoi Tutorial
Vinil Cut#
The first test I did it in Silhouette CAMEO and prepared the file in Silhouette Studio but then I had to change to Roland machine because it was bigger.
Save print as .dxf .ai .eps .png It is better to save as filled figures because then you will have to draw silhouettes again in the Roland program.
Screenprinting#
The very first test was about understanding the proportion needed and the stetics wanted.
The second test was more precise and better to learn the right method to apply the ink in the fabric
Finally all the setups were correct in the pattern and it was time tu print the final fabric.
Previously you will have to prepare a frame as big as the screen printing frame will fit, also, if powder, prepare the thermochromic pigment with a transparent base, then follow this steps:
- Prepare the screen printing frame with the vinil
- Cut the fabric to the big frame size. If the fabric is elastic, calculate the elasticity and cut a smaller size so you can print it stretched and when you stretch the fabric the pattern is not affected. Some fabrics create an interesting texture when they srink back to normal. Make few tests before to see if you like the effect.
- Hold the fabric in the frame with pushpins
- Cover your working space with cardboard to absorb the excess of the ink. Put the screen printing frame inside the big frame and ask someone to help holding it in place
- Put the ink in one of the sides and then pull it with the spatula making pressure so you make sure it goes through the vinil.
- After covering all the area, slowly take out the screen printing frame starting from one side to the other and wash the ink in the frame as soon as you can because it drys super fast.
- Let dry in the frame and enjoy the final result!
Electronics#
Single Vibration Motor Circuit#
Arduino Board
Vibration Motor
1N4001 Diode
0.1µF ceramic capacitor
1KΩ Resistor
2N2222 NPN Transistor
USB Connector
How to build a single vibrator motor circuit
Haptic Controller#
How to build a single vibrator motor circuit with haptic controller
Multiple Vibration Motor Circuit#
ATTINY 44#
| Qty | Description | Unit Price | Link | Notes |
|---|---|---|---|---|
| 8 | Vibrating Mini Motor | 1.05 $ | https://www.mouser.es/ProductDetail/Seeed-Studio/316040001?qs=sGAEpiMZZMtzPgOfznR9QYnqSVusfreyH0gqRqEUIzo%3D | |
| 2 | ULN2803 Transistor Darlington | 1.04 $ | https://www.mouser.es/ProductDetail/STMicroelectronics/ULN2803A?qs=sGAEpiMZZMvAvBNgSS9LqpP7ived4CP2 | Order many |
| 2 | ATtiny 44 | 1.55 $ | https://www.mouser.es/ProductDetail/Microchip-Technology-Atmel/ATTINY44-20PU?qs=sGAEpiMZZMvqv2n3s2xjsViK%2FE7aLZlHG3y6C2%2Fswfs%3D | |
| 2 | Socket Pins | 0.20 $ | https://www.mouser.es/ProductDetail/TE-Connectivity/1-2199298-3?qs=sGAEpiMZZMs%2FSh%2Fkjph1tg2rzwRe0qPTlCvrbVvUSVs= | |
| 2 | Red mini LED | 1.00 $ | http://amazon.com/test | |
| 2 | DIP / SIP Sockets | 3.90 $ | https://www.mouser.es/ProductDetail/Mill-Max/315-47-104-41-004000?qs=sGAEpiMZZMs%2FSh%2Fkjph1tp4TgMr3lgK9d9V7cviKn%252Bc= |
Here is a tutorial on How to program ATTINY44 with Arduino
We only had the adaptor for ATTINY45 so we tryed to program in the board but it always throus a mistake and as its not compatible with Arduino Program, we were not able to digitalprint and understand what happened so we needed to change plans.
We also tryied using a Generic Touch Library for Arduino but we weren´t able to make it work.
ATMEGA328P/ Arduino Pro Micro#
| Qty | Description | Unit Price | Link | Notes |
|---|---|---|---|---|
| 8 | Vibrating Mini Motor | 1.05 $ | https://www.mouser.es/ProductDetail/Seeed-Studio/316040001?qs=sGAEpiMZZMtzPgOfznR9QYnqSVusfreyH0gqRqEUIzo%3D | |
| 2 | ULN2803 Transistor Darlington | 1.04 $ | https://www.mouser.es/ProductDetail/STMicroelectronics/ULN2803A?qs=sGAEpiMZZMvAvBNgSS9LqpP7ived4CP2 | Order many |
| 2 | Arduino Pro Micro (3 pieces) | 19.99 $ | https://www.amazon.es/KeeYees-ATmega32U4-Desarrollo-Microcontrolador-Bootloader/dp/B07FQBQ4Z6/ref=pd_sbs_0_8?_encoding=UTF8&pd_rd_i=B07FQBQ4Z6&pd_rd_r=2c06c844-4b41-11e9-8933-61295205c524&pd_rd_w=k28eA&pd_rd_wg=yLeYQ&pf_rd_p=015a6fb5-f315-4cbc-9908-0dbd43620b7b&pf_rd_r=6GQG0R4PJ59TRN8WM1Q6&psc=1&refRID=6GQG0R4PJ59TRN8WM1Q6 | |
| 1 | Pack of 5 Batteries 8X20X36mm with charger | 18.00 $ | https://www.amazon.es/Fytoo-Bater%C3%ADa-Cargador-Quadcopter-repuestos/dp/B07DCQKBFF/ref=sr_1_1?s=toys&ie=UTF8&qid=1551379245&sr=1-1&keywords=3.7+400 | |
| 1 | Tira de 40 Socket DPI “macho” (adapt battery) | 0.22 $ | https://www.electrohobby.es/tiras-de-pines/235-tira-40-pin-macho-plateado.html | |
| 1 | Protoboard | 11.21 $ | https://www.mouser.es/ProductDetail/BusBoard-Prototype-Systems/PAD3U?qs=sGAEpiMZZMveaWjGIsDKYsdykszqEFGQ | |
| 1 | Flexible Thin Cable Roll | 9.00 $ | Onda Radio |
ULN2803 Transistor Darlington#
Vibration Motor#
Dimension 10mm diameter, 2.7mm thick
Weight: 0.9g
Voltage 2V - 5V
5V Current draw: 100mA 4V Current draw: 80mA 3V Current draw: 60mA 2V Current draw: 40mA
Battery#
| Adafruit Lipo Battery | Tiny Whoop Lipo Battery | |
|---|---|---|
| Weight | 8.2g | 14.8g |
| Size | 35.5 x 16.6 x 7.6 mm | 58 x 17 x 8 mm |
| Output | 400 mAh at 3.7 V | 600 mAh at 3.7 V |
Arduino Atmega328 Power Consumption
The Circuit#
| Qty | Description | Unit Price | Link | Notes |
|---|---|---|---|---|
| 1 | Pack of 150 Heat Srink Tube | 1.47 $ | https://www.mouser.es/ProductDetail/TE-Connectivity-Raychem/CGPT-127-64-0-SP?qs=sGAEpiMZZMtE4ePzUE8d2NwL9N%2Fo09ja | |
| 1 | Electric Soldering Iron Kit | 22.63 $ | https://www.amazon.es/GOZAR-Electric-Heating-Soldering-Portable/dp/B077SDS6VP/ref=sr_1_58?__mk_es_ES=%C3%85M%C3%85%C5%BD%C3%95%C3%91&keywords=electric+soldering+iron&qid=1557165463&s=gateway&sr=8-58 | |
| 1 | Lighter | 1.21 $ | https://www.mouser.es/ProductDetail/BusBoard-Prototype-Systems/PAD3U?qs=sGAEpiMZZMveaWjGIsDKYsdykszqEFGQ |
CODE#
Patterns#
Talla 90
Frankenstein#
As the design was ready, it was time to draw the patterns and try the first prototype. It was an important stage to experiment different color combinations and techniques. The fitting was pretty good from the begining, it was just a matter of adjusting some little details.
As my first wearable, there was a lot to learn from the electronics.
<<The first idea was to use conductive fabric as wire
Modificaciones
Diseño final
Improving the garment#
Things to consider for the improved version:
- Improve the connection between cables and solder because it´s very fragile
- Make the circuit and electronics spaces easy to acces for being able to fix and replace pieces easy
- Make a little box to protect the chip and electronics
Aditional information#
Insulation Techniques for E-Textiles
How to Work with Conductive Fabrics
Lasercut Stretchy Conductive Fabric Traces
Free Video Editor to Speed Free Gif Maker
Making the world vibrate!!