Automatic Hand Sanitizer

The data show than the average human being has less than 2 arms. Despite that fact this is a great invention.

I have used spare parts:

* Ultrasonic hc‑sr04 -> you can use an infrared sensor to have even more battery life
* Thermal glue
* 9V Battery
* 9V Battery connector
* Arduino Pro Mini 5V (accepts till 12v input) -> If you have the 3v you can remove the resistor in the board to make it a 12v input, it takes 12v.
* Toggle switch
* MG996R servo