Open Source Flipper Zero, Thread, Matter, and Zigbee on ESP32, Arduino go Zephyr, and more!

0:00:00 / -

Watch now on YouTube Watch now

Diy Hand Wash Reminder

Made by mukesh-sankhla / 3D Printing / Clocks / Health / Kids & Family / Weather

About the project

Hand Wash Reminder is a Hand Band which reminds you to wash your hands after every 20 minutes.

Project info

Difficulty: Easy

Platforms: Arduino, NeoPixel, SparkFun

Estimated time: 3 hours

License: Creative Commons Attribution-NonCommercial-ShareAlike CC BY-NC-SA version 4.0 or later (CC BY-NC-SA 4+)

Items used in this project

Hardware components

	Polymer Lithium Ion Battery - 1000mAh	x 1
	ARDUINO NANO V3	x 1
	Push-button Power Switch Breakout	x 1
	ON/OFF Rocker switch	x 1
	Single Stand Wire	x 1

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

	Soldering tools	x 1
	3D Printer	x 1

Story

Hand Wash Reminder is made using a Arduino Nano, a WS2812b LED and a home made Vibration Sensor. Whenever a person wants wash his/her hands they have to shake their hand with force so that vibration sensor detects the vibrations and triggers the reset of the Arduino board. As Arduino is reset the program comes to the initial values and starts. First the fading colors are lighten on the LED for 30 seconds which acts as a timer for rubbing our hands for 30 seconds, after fading mode Green color lights on the LED it stays for 20 minutes indicating that your hands are washed, after 20 minutes LED lights with Red color indicating that your hands are not washed. The Red color stays until you shake your hand and wash your Hands.

Schematics, diagrams and documents

Circuit Diagram:

CAD, enclosures and custom parts

Hand Band Clip

Go to download

3D Body

Go to download

Code

Arduino Code

#include<FastLED.h>

#define LED_PIN     3
#define NUM_LEDS    1
#define LED_TYPE    WS2812B
#define COLOR_ORDER GRB
#define BRIGHTNESS  100
CRGB leds[NUM_LEDS];
#define UPDATES_PER_SECOND 100

void setup() 
{
  Serial.begin(9600);
  FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS);
  FastLED.setBrightness(  BRIGHTNESS );
}

void loop() 
{
    Serial.print("Start\n");
    for(int i=0;i<=3000;i++)
    {
    static uint8_t hue = 0;
    for(int i = 0; i < NUM_LEDS; i++) 
    {
    leds[i] = CHSV(hue++, 255, 255);
    FastLED.show(); 
    fadeall();
    delay(10);
    }
    }
    for(int i=0;i<20;i++)
    {
      leds[0] = CRGB(0,255,0);
      FastLED.show();
      delay(60000);
    }
    while(1)
    {
      leds[0] = CRGB(255,0,0);
      FastLED.show();
    }
}
void fadeall()
{ 
  for(int i = 0; i < NUM_LEDS; i++) 
  { 
    leds[i].nscale8(250);
  }
}

Credits

mukesh-sankhla

🧑‍💻Passionate software engineer at Siemens, dedicated to driving digitalization by day. 🧑‍🏭By night, I'm a maker exploring IoT, product design, electronics, CAD, and 3D printing, sharing my projects with the world.

Shop

Project Hub

Video

Blog

Shop home

3D printing

Single Board Computers

Development kits

Sensors

Internet of things

Robotics

Accessories

Product of the Week

Electromaker Educator

The Electromaker Show

The Electromaker Podcast

Diy Hand Wash Reminder

About the project

Project info