Description - Voltage Dividers
Need to measure a large voltage on a microcontroller? A good option is a voltage divider. This is two resistors in series, with a point in the middle. This AddOhms Video explains how to calculate the resistors needed for a specific voltage.
Correction: There is a mistake around 3:00. I say "91 millivolts" and I should have said "910 millivolts!"