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automatic-hand-sanitizer-using-arduino-90c256-en.md
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Contactless Care: Automatic Hand Sanitizer

The Automatic Hand Sanitizer Dispenser is a highly practical project that has become essential in public spaces. It uses infrared or ultrasonic sensing to detect your hand and dispense a precise amount of sanitizer without any physical contact.

How It Functions

  1. The Detection: An HC-SR04 ultrasonic sensor (or an IR obstacle sensor) is mounted at the dispenser's nozzle.
  2. The Trigger: When you place your hand under the nozzle, the sensor detects the change in distance.
  3. The Pump: The Arduino triggers a Miniature 5V/12V DC Pump for a short duration (e.g., 500ms).
  4. Dispensing: A small amount of sanitizer is pumped from a reservoir through a tube to your hand.

Hardware Components

  • Arduino Nano: Used for its small size, ideal for fitting inside a dispenser casing.
  • HC-SR04 Ultrasonic Sensor: To detect the presence of hands.
  • Mini DC Water Pump: To move the liquid.
  • Tip120 Transistor or Relay: To handle the high current required by the pump.
  • Battery Pack (e.g., 4x AA or Li-ion).

Design Tip

When building your dispenser, use silicone tubing instead of standard PVC, as it is more resistant to the high alcohol content found in sanitizers. This project combines sensing, fluid dynamics, and mechanical design into a single, high-impact device.

ข้อมูล Frontmatter ดั้งเดิม 

apps: []
author: "aakash11"
category: "Health & Wellbeing"
components:
  - "1x Male/Female Jumper Wires"
  - "1x SG90 Micro-servo motor"
  - "1x Arduino UNO"
  - "1x Ultrasonic Sensor - HC-SR04 (Generic)"
description: "Stay hygienic with tech! Build a contactless hand sanitizer dispenser using an ultrasonic sensor and a mini water pump for a germ-free experience."
difficulty: "Intermediate"
documentationLinks: []
downloadableFiles:
  - "https://projects.arduinocontent.cc/c8322aad-780b-4626-adf3-12a813c86d4b.ino"
  - "https://projects.arduinocontent.cc/c8322aad-780b-4626-adf3-12a813c86d4b.ino"
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lang: "en"
likes: 4
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seoDescription: "Build an automatic hand sanitizer using Arduino, ultrasonic sensor, and servo motor. Easy step-by-step DIY project guide."
tags:
  - "wearables"
  - "embedded"
  - "hand sanitizer"
  - "covid19"
  - "safety"
title: "Automatic hand sanitizer using arduino"
tools: []
videoLinks:
  - "https://www.youtube.com/embed/sxqBbkhozYM"
views: 42399