Component used in the Hand sanitizer are:
1: ultra sonic sensor(hc-sr404)
2: servo motor
3:aurdino nano
4: breadboard
5: jumper wires
Please watch the demonstration video here: https://youtu.be/304w3Vvh_3k
Please watch the explanation video (in Hindi) here: https://youtu.be/JOpuCko17FY
This Project is made with lots of effort and love by Suryansh Pratap Singh & Aman Mishra.
Thank You.
Some Images of the Automatic Hand Sanitizers which we had made: