We are biomimicing human skin on the fingers

What are we biomimicing?

Create wrinkles

؜Improving grip wet objects by channeling water away.

Human hands wrinkle when wet due to an autonomic nervous system response that constricts blood vessels beneath the skin, causing the tissue to shrink and form ridges

How does it work?

We are implying this to make the shoes surface mor grippy.

Problem

People are slipping on the smooth surface when it is wet.

Or Elderly could slip particulary

Solution

Create a surface that is smooth when dry and has bumps for improved friction when wet. Helps the elderly

Conceptual Precedent

Technical Precedent

Sketch

1st prototype

2nd prototype

Next Steps

Start writing code for the Aurdione connect to moisture sencor.

؜Consider a better way to create a grip with shoes when the surface is wet.

Additional Idea

Mid Review Feedback

Change from switching the ground to a shoe

then a different switch

ChatGpt feedback

Chat GPT usage

Post Mid Review Iteration 1

Post Mid Review initial iterations

#include <Stepper.h>

const int stepsPerRevolution = 2048;

// IN1, IN3, IN2, IN4

Stepper myStepper(stepsPerRevolution, 8, 11, 10, 12);

void setup() {

Serial.begin(9600);

Serial.println("Stepper motor test starting...");

myStepper.setSpeed(10); // RPM

}

void loop() {

Serial.println("Turning clockwise");

myStepper.step(2048);

delay(1000);

Serial.println("Turning counterclockwise");

myStepper.step(-2048);

delay(1000);

}

Code evolution

#include <Stepper.h>

const int stepsPerRevolution = 2048;

Stepper myStepper(stepsPerRevolution, 8, 11, 10, 12);

const int waterSensorPin = 2; // digital water sensor pin

void setup() {

Serial.begin(9600);

Serial.println("Stepper motor water demo starting...");

pinMode(waterSensorPin, INPUT);

myStepper.setSpeed(10); // RPM

}

void loop() {

int sensorState = digitalRead(waterSensorPin);

if (sensorState == HIGH) { // wet

Serial.println("Sensor wet! Motor spinning for 5 seconds...");

unsigned long startTime = millis();

while (millis() - startTime < 5000) { // spin for 5 seconds

myStepper.step(1); // one step at a time for smooth motion

}

Serial.println("Motor stopped.");

}

else { // dry

Serial.println("Sensor dry. Motor stopped.");

delay(500); // small delay to avoid flooding the serial monitor

}

}

#include <Stepper.h>

const int stepsPerRevolution = 2048;Stepper myStepper(stepsPerRevolution, 8, 11, 10, 12);

const int waterSensorPin = A1; // analog water sensor pinconst int threshold = 300;

void setup() { Serial.begin(9600); Serial.println("Stepper motor water direction demo starting...");

myStepper.setSpeed(10); // RPM}

void loop() { int sensorValue = analogRead(waterSensorPin);

Serial.print("Water sensor value: "); Serial.println(sensorValue);

unsigned long startTime = millis();

if (sensorValue > threshold) { Serial.println("Wet detected → Clockwise for 5 seconds");

while (millis() - startTime < 5000) { myStepper.step(1); // clockwise } } else { Serial.println("Dry detected → Counterclockwise for 5 seconds");

while (millis() - startTime < 5000) { myStepper.step(-1); // counterclockwise } }

Serial.println("Motor stopped.\n"); delay(1000); // pause before next reading}

#include <Stepper.h>

const int stepsPerRevolution = 2048;

Stepper myStepper(stepsPerRevolution, 8, 11, 10, 12);

const int waterSensorPin = A1;

const int threshold = 300;

bool lastWetState = false; // remembers previous state

void setup() {

Serial.begin(9600);

Serial.println("Stepper motor water direction demo starting...");

myStepper.setSpeed(10); // RPM

}

void loop() {

int sensorValue = analogRead(waterSensorPin);

bool isWet = sensorValue > threshold;

Serial.print("Water sensor value: ");

Serial.println(sensorValue);

// ✅ Detect state change

if (isWet != lastWetState) {

unsigned long startTime = millis();

if (isWet) {

Serial.println("Wet detected → Clockwise for 5 seconds");

while (millis() - startTime < 5000) {

myStepper.step(1); // clockwise

}

} else {

Serial.println("Dry detected → Counterclockwise for 5 seconds");

while (millis() - startTime < 5000) {

myStepper.step(-1); // counterclockwise

}

}

Serial.println("Motor stopped.\n");

// ✅ Update last state AFTER motor action

lastWetState = isWet;

}

delay(200); // small delay to reduce sensor noise

}

Final wiring and code

Battery port

Nano Arduino

Water sensor

Stepper motor

Tinker unit 3d print

؜with very little help from Mr Bansiter

؜

Shoe Add-on

؜Sole cover with bumps

؜Rim of shoe lining

؜Shin cover

Video of shoe

Video of arduino/motor

A picture in the booth of final project

Final Project

Thank you

To Mr. Danziger, Mr. Lew, Mr. Banister and Ms. Maiurano for helping us with our project