Hackaday.io Hackaday.io
Projects
Discover Contests Courses Stack
More
Courses Tutorials Events Hackerspaces Hackaday.com Tindie Marketplace
Sign up Log in
Close
0%
0%

No Touch Hand Washing Countdown Timer

A simple 20 second no touch countdown timer using and Arduino UNO, an HC-SR04 Ultrasonic sensor and a 7 segment display.

paul-mccabePaul McCabe
Following Follow project
Liked Like project

Become a Hackaday.io member

Not a member? You should Sign up.

Already have an account? Log in.

Sign up with Github
Sign up with Twitter OR
Forgot your password?

Just one more thing

To make the experience fit your profile, pick a username and tell us what interests you.

Pick an awesome username
hackaday.io/
Your profile's URL: hackaday.io/username. Max 25 alphanumeric characters.
Pick a few interests
Projects that share your interests
People that share your interests

We found and based on your interests.

Choose more interests.

OK, I'm done! Skip
Join this project
Public Chat
Similar projects worth following
754 views
0 comments
3 followers
4 likes
  • Description
  • Details
  • Files 1
    • View all
  • Components 5
    • View all
  • Logs 0
  • Instructions 0
  • Discussion 0
View Gallery
Public Chat
754
0
3
4

Team (1)

  • paul-mccabePaul McCabe

Join this project's team
  • HandWashingTimer
  • UltraSonic Sensor Code
  • 7 Segment Display Code
completed project
hardware
Hand Washing timer COVID-19 corona Virus hands free timer

Related lists

COVID-19 Response Project List

A project list for all projects that have to do with the COVID-19 (Coronavirus) pandemic.

This project was created on 03/22/2020 and last updated a year ago.

Description

The CDC recommends we wash our hands for at least 20 seconds due to the current COVID-19 pandemic. This is a simple no touch 20 second count down timer that you can use while washing your hands. The 20 count down starts when you wave your hand near the ultrasonic sensor.

Details

Files

handWashingTimer.ino

Arduino Sketch

ino - 6.40 kB - 03/22/2020 at 00:49

Download

Components

  • 1 × 1 each -Arduino UNO
  • 1 × 1 each - 4 Digit 7 Segment Display SMA420564
  • 1 × 1 each - UltraSonic Sensor HC-SR04
  • 1 × 4 each - 220 Ohm resistor
  • 1 × USB Battery

Enjoy this project?

Share

Discussions

Log In/Sign up to comment

Become a Hackaday.io Member

Create an account to leave a comment. Already have an account? Log In.

Sign up with Github
Sign up with Twitter OR

Similar Projects

This is a simple atmospheric Gas Analyser Using Arduino
Project Owner Contributor

Atmospheric Gas Analyser

hariramanil810hariramanil810

Classic 555 Timer IC Piano Reimagined with Modern Touch Sensor IC!
Project Owner Contributor

Touch Piano : 555 Timer Piano Modern Version

hiro-akihabaraHiro Akihabara

Use a ratiometric linear Hall effect sensor to build simple Magnetic field strength meter
Project Owner Contributor

Arduino Magnetic field strength meter

mircemkmircemk

In this tutorial I am going to show you guys how to make an Arduino or NodeMCU based Weather Station using DHT11 or DHT22 and OLED Display
Project Owner Contributor

Weather Station Using Arduino and NodeMCU

hulkHulk

Does this project spark your interest?

Become a member to follow this project and never miss any updates
Going up?

About Us Contact Hackaday.io Give Feedback Terms of Use Privacy Policy Hackaday API

© 2025 Hackaday

Yes, delete it Cancel

Report project as inappropriate

You are about to report the project "No Touch Hand Washing Countdown Timer", please tell us the reason.

Send message

Your application has been submitted.

Remove Member

Are you sure you want to remove yourself as a member for this project?

Project owner will be notified upon removal.