Hand sanitizers are becoming very essential to reduce the risk of COVID 19, and hygiene improvement in public places, indoors, and also in private sectors. A key aspect of this innovation is to fight the spread of germs by applying sanitizer on our hands with a zero contact system. The system is incorporated with a range sensor (sonic) where when a hand is placed at a distance of approximately 2cm, it senses the hand motion and triggers the pump through a relay at a delay of 200 milliseconds. The relay module has normally closed and normally open contacts, when it is energized through the trigger from the micro-controller, the normally open becomes high. The microcontroller also triggers the pump through the relay module, which opens automatically releasing the alcohol sanitizer for a duration of 200 milliseconds and then di energizes to normally closed.

1. Key features of  this Innovation are;   

• a) 48hrs stand-alone rechargeable battery
• b) Has a capacity of 1L  of sanitizer and above depending on what you want
• c) Dispenses 1mL per person ie. Can serve large population
• d) It works with or without an external power supply as long as it was charged.
• e) Uses LIQUID (low viscosity) sanitizer ONLY

      3. I assembled all the hardware materials that were needed ie(Arduino Nano, PCB board, ultrasonic sensor, relay, 18650 lithium-ion battery, and TP5410.

      4. Carried out soldering of Arduino Nano in the PCB ensuring no short circuit, also mounted and soldered the relay, in4007 and 1K resistor to the output pin(D2) from the Arduino and ultrasonic sensor cables.

      5. After soldering everything and carried out tests such as continuity the project was ready to be put on and enclosure casing.

     6. Below are progressive images and  video links showing the complete project