- #1
OldWorldBlues
- 26
- 3
Hi! I'm working on a project in which a small microcontroller with a max. analog input of 5v takes readings from multiple sensors. I would like to make this input window a bit more versatile, and turned to voltage dividers as a solution. 'Problem is, I'm having a bit of trouble understanding how to work with them. I saw the above diagram while researching the topic, but I'm not sure about exactly how it works. I read that R1 creates a voltage drop, but so does R2. I assume that this means that since the voltage from R2 to ground will be lower than from R1 to ground, the voltage between R1 and R2 will be proportional to the input and such. But then why not just use one resistor? Thanks for any help I can get :)