Coronavirus disease (COVID-19) is an infectious disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-Cov-2). COVID-19 has affected millions of people and has claimed the lives of hundreds of thousands of people from all over the world. This disease affects different people in different ways. Some people may develop mild to moderate illness and recover without special treatment or hospitalisation, while some may develop severe illness and even die. The incubation period of this virus, on average 5-6 days but it could also be up to 2 weeks. During this period, the person may not experience any symptoms but could still be contagious. The person will be a virus carrier and easily spread it when he/ she does not take any precautionary measures.
Coronavirus has spread rapidly and many countries have been affected by this pandemic. While some countries are recovering, other countries are still in lockdown and some are suffering from the second wave of coronavirus.How does coronavirus spread?
According to the World Health Organisation, WHO, coronavirus is mainly transmitted through droplets generated when an infected person coughs, sneezes, or exhales. These droplets are too heavy to hang in air, so they quickly fall on the surfaces below.
A person could contract this disease if he/ she breathes in the virus while an infected person/ virus carrier within close proximity sneezes or coughs, or when he/ she touches a contaminated surface and then his/ her eyes, nose or mouth.How can the spread of coronavirus be controlled?
As you may have read in the above section about how the virus spreads, you would be now aware of two main factors: standing in close proximity with an infected person and touching a contaminated surface.
We can curb the spread of coronavirus by taking these two important factors in account.
It is important to avoid standing in close proximity with other people because they could sometimes be a virus carrier. As I have already explained, the person could be contagious before they develop any symptoms. To prevent standing in close proximity, we are advised to practice social distancing.
To prevent touching a contaminated surface and then our eyes, nose or mouth, we must wash our hands properly for at least 20 seconds. WHO has advised us to use soap as it is a self-cleansing product and more effective at killing the virus. Soap is available at many places where hand sanitizer or liquid soap is not, and is also cheaper than the other two products.
Sometimes we could touch the faucet carelessly after we wash our hands and the faucet could be contaminated. The person would then touch his/ her eyes, nose or mouth, and he/she has a higher chance of contracting this coronavirus disease. To prevent this from happening, we can use a touchless faucet, this project.How it works
I have made an automatic faucet which detects the hands within 10 cm and allows safe hand washing.
I have programmed my Arduino microcontroller to switch on the relay module when the ultrasonic sensor detects my hand within 10 cm. The submersible water pump is switched on along with the relay module and begins to pump water through the tube connected to it.
The water flow will be stopped when the faucet is not in use or during soaping, and this saves water. You do not have to touch the surface of the faucet after you wash your hands; you can wash your hands safely and prevent coronavirus disease. The tube is led out of the plastic container and acts as a faucet.
I made this project with limited resources. Those who are interested can remake this project, and if you like you can make some improvements too. I did not have a solenoid water valve with me, so I had to use the submersible water pump to demonstrate my project. This project is effective, easy and only costs around $10 to build.
You can reuse plastic containers and convert them into touchless faucets. This prototype is portable and can be used anywhere. They can be powered using rechargeable Li ion batteries and the batteries can be charged with solar panels.