Arduino ADC is usable around 10/12 bits. That means it can measure up to 1024/4096 diferent voltage levels. Counting frequency instead can let you choose your own diferent measurement levels ...

Learn how to build Arduino boards, code them, and use them in your projects with these 13 courses. / Sci-Fi Visions / Diy / Internet Of Things / Iot 8.29.21, 7:44 AM EDT by Futurism Creative ...