How to Make an Automatic Hand Sanitizer Dispenser Using Arduino
In the wake of the COVID-19 pandemic, the importance of hand hygiene has been brought to the forefront. With the increased demand for hand sanitizers, it has become essential to find innovative ways to ensure that this essential product is readily available. One such innovative solution is the creation of an automatic hand sanitizer dispenser using Arduino. This article will guide you through the process of building your own automatic hand sanitizer dispenser, providing you with the necessary steps and components to get started.
Understanding the Basics
Before diving into the construction process, it is important to have a basic understanding of Arduino and its capabilities. Arduino is an open-source electronics platform that allows users to create interactive objects or environments. It is based on easy-to-use hardware and software, making it an ideal choice for beginners and experienced makers alike.
Components Needed
To build an automatic hand sanitizer dispenser using Arduino, you will need the following components:
1. Arduino Uno or compatible board
2. Breadboard
3. Jumper wires
4. Motor driver (e.g., L298N)
5. Servo motor
6. Push button
7. Relay module
8. DC motor
9. Hand sanitizer bottle
10. Power supply (e.g., 9V battery)
11. Resistor (e.g., 1kΩ)
12. Diode (e.g., 1N4007)
13. LED
14. Resistors (e.g., 220Ω)
15. Transistor (e.g., BC547)
Step-by-Step Guide
1. Connect the Servo Motor: Connect the servo motor to the Arduino Uno using the motor driver. The motor driver will allow you to control the servo motor with the Arduino.
2. Connect the Push Button: Connect the push button to the Arduino Uno. The push button will be used to trigger the hand sanitizer dispenser.
3. Connect the Relay Module: Connect the relay module to the Arduino Uno. The relay module will be used to control the power supply to the DC motor, which will dispense the hand sanitizer.
4. Connect the LED: Connect the LED to the Arduino Uno. The LED will be used to indicate when the hand sanitizer dispenser is active.
5. Connect the Diode: Connect the diode in parallel with the relay module to protect the circuit from voltage spikes.
6. Connect the Resistor: Connect the resistor in series with the LED to limit the current flowing through the LED.
7. Connect the Transistor: Connect the transistor to the relay module. The transistor will be used to amplify the signal from the Arduino Uno to control the relay module.
8. Connect the DC Motor: Connect the DC motor to the motor driver. The DC motor will be used to dispense the hand sanitizer.
9. Connect the Hand Sanitizer Bottle: Place the hand sanitizer bottle on top of the DC motor and secure it in place.
10. Program the Arduino: Write a program for the Arduino that reads the push button input, controls the servo motor to dispense the hand sanitizer, and activates the LED to indicate the dispenser is active.
11. Upload the Program: Upload the program to the Arduino Uno.
12. Test the Dispenser: Test the hand sanitizer dispenser by pressing the push button. The servo motor should dispense the hand sanitizer, and the LED should light up to indicate the dispenser is active.
Conclusion
Building an automatic hand sanitizer dispenser using Arduino is a rewarding project that can help ensure the availability of hand sanitizers in public spaces. By following this guide, you can create your own dispenser that provides a convenient and hygienic solution to the ongoing hand hygiene crisis.
