Haptic Feedback Experiments

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PARTS AND MATERIALS –

(1)Breadboard

(1)Arduino Nano 33 IOT

(2)Keyes Vibrating motor module

(2) Transistors

(2) LED lights replacement of diodes

Jumper wires

Aligator Clips

Conductive Fabric

Conductive Thread

Felt Fabric

Thread & Glue gun

CIRCUIT DIAGRAMS –

Experiment 1 – Understanding Vibrating motors blink/fade

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Experiment 2 – Tactile illusions

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CODE –

https://github.com/simranduggal96/Prototype-6—Haptic-Feedback

INDTRODUCTION 

EXPERIMENT 1 –

In the first experiment , my aim was to understand how the vibrating motors work and how the sensation feels when we change the intensity of the vibrations.I tried both Blink and Fade code and explored the vibration sensation by directly moving the motor on my fingers and palm. I also tried putting a fabric between by hand and the vibration motor and observed that the sensation varies from the thickness and nature of the materials in between.

BLINK –

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FADE –

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EXPERIMENT 2 – Face massage tool

For the second experiment, I wanted to create a small product prototype with two vibrating motors. I also used my learning from the ‘Digital Switches’ and made a Face Massaging tool that works only when pressure is applied and the digital switches connects. The prototype has been constructed in layers with conductive fabric sandwiched between felt fabric, connected with conductive threads and vibrating motors attached to the another layer of felt fabric.

The motors are coded in such a way that creates a tactile illusion of vibrating sensation. As soon as the Positive and Negative of the conductive fabric touch each other, the first motor starts vibrating. After a few seconds, even the other motor turns on and the intensity of the vibration increases. When the digital switches disconnect, the one motor turns off immediately and the other one turns off after a few seconds. As a facial massaging product, this sensation illusions helps in slowly decreasing the intensity of vibration on the face.

Process Images & Video –

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Final Images & Video –

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References –

https://www.theragun.com/ca/en-ca/pro-ca.html

https://www.scientificamerican.com/article/touching-illusions-2008-05/

Haptics Experiment

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Parts & Materials

(1)Breadboard

(1)Arduino Uno

(4)Keyes Vibrating motor module

Jumper wires

(1)Tape

(1)Pen

Circuit diagram

Simple Motor Activation

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Sensory Funneling Illusion & Phi Phenomena

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Sensory Saltation

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Code

https://github.com/ajiujiu1003/Body-centric-technology

introduction

Experiment1

One vibrating motor module was connected to Arduino Uno. I learned something basic about Arduino code by watching videos and then tried out the “Blink” and “Fade” example, running different digitalWrite and analogWrite. It was such an exciting experience to see the module started to vibrate and how the code worked!

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Experiment2

First, I connected the modules to breadboard and Arduino Uno. Then I applied several strips of tape on the vibrating motor modules to fix them to my skin, and then wrote down their number.

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The four vibrating modules were placed like a square on the back of my left hand. They vibrated at the same time and lasted for 0.2 second each time, and there was a two-second paulse between each tap. Although they were vibrating in four different positions, what I felt was the point in the center of these four modules was stumulated.

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The second Illusion to be experimented is phi phenomena. I taped four vibrating motor onto my arm. The module connected to pin 13 tapped first, and then it’s 8, 2 and finally 4.  It was like the tap was originally generated from the first motor and move gradually to the last one, rather then there were four single taps.

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The last one is sensory saltation, or cutaneous rabbit, which I think is the most interesting one. I used three vibrating motor modules to test this illusion, and taped them on my arm like the former experiment. Each module vibrated for 0.2 second one after another, from the no.13 to the no.2. During this process, I can feel only two stimuli, one located between no.13 and no.4, and the other located between no.4 and no.2. What’s more, they were not felt like two single stimuli; instead, it was like something moving under my skin quickly.

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reference

https://www.bilibili.com/video/BV1YW411Z76E?from=search&seid=15475397622865977605

https://en.wikipedia.org/wiki/Cutaneous_rabbit_illusion

https://en.wikipedia.org/wiki/Phi_phenomenon