DIY: How to build a Hands-free water & liquid soap dispenser

DIY: How to build a Hands-free water & liquid soap dispenser - DE JAY'S BLOG

If a prize were to be given to the 'world's innovative minds', I know just the man to win, Samuel Adranyi . Okay, I might be a bit biased, but he would certainly be a top qualifier. I know you are wondering who this is, Sam is one of the tech enthusiasts I look up to.

It's probably not something you've put much thought into, but hand washing soap has evolved a lot over the last five decades or so. We've gone from bars of solid soap to liquid soap in pump dispensers to automatic, hands-free solutions, like Sam's homemade solution. Touchless systems could be a great way to inspire people (especially kids) to wash their hands to help reduce the risks of spreading viruses and germs.

How it works

Hands free water & liquid soap dispenser

It has two pipe outlets, one of which is for water and the other for liquid soap. The control box is beneath the white cover, hidden from the user. The pipes are wired to through and can be dropped into any water source. The entire system is powered by a 150 watts solar panel. With a smart and durable design, the system seeks to improve your handwashing experience.

A simple pass of your hand below the sensors makes the liquid soap provide an accurate amount of soap and water every time to avoid wastage. In fact, it can save up to 50% if soap every day when using diluted liquid at a ratio of 1 to 4, as well as conserve water in areas where there's limited supply.

Major components

  • Sensors
  • A pump (for the water and soap)
  • Back converter (which takes input from the solar panel which outputs 12 volts of power to the Arduino)
  • A paper towel
  • A foil (to make up for a sink )

A poignant reminder of the unseen enemy the world is fighting, a lot of people have been forced to self-isolate. This is a great time to add value to yourself, learn new things and build on the knowledge you already have. I would personally recommend you check out Sam's YouTube channel where you can find other interesting projects you can try out.

A breakdown of how the project was built here.
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