5V 출력신호를 3.3V 정치로 보내거나 변환해야하는 경우가 있다.
계산하면 다음과 같다.
A voltage divider is a simple circuit which reduces a large voltage into a smaller one.
Using 2 resistors and an input voltage, we can create an output voltage that is a fraction of the input. Below you can see the formula that you need to use to calculate the resistors that you need in your circuit:
Solving the formula above with Vin=5V, R1=1000ohms and Vout=3.3V.
We get R2~=2000ohms.
So, here’s how the final circuit looks like:
