Here are some ideas of what you can do with the humble voltage divider. This elementary circuit has a few inventive uses. To be upfront, one of these uses is NOT as a voltage regulator. If you need a voltage regulated, get a voltage regulator! At some point or another, I’ve built all five of these voltage divider circuits. For me, the voltage level shifter is the most common.
- Measure Battery Voltage
- Signal Level Shifter
- Reference Voltage
- R-2R Ladder
- One Analog Input with Many Buttons