Automatic Hand Sanitizer
thingiverse
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 <- totally over sized/powered Arduino code: * **https://gitlab.com/random_weekends_projects/automatic_hand_sanitizer** Electronic schema: * You can infer the 3 connections from the source code. Videos * https://youtu.be/4rUDopdRhQs * https://youtu.be/xu0SeEST_0M Note: Some comments were pointing that this product is not apt for arm-less people, that is not true, they can use it to soap their d*** (if they manage to pull it out), just by swinging it in front of the ultrasound sensor.
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