The Hidden Superpower of 4-Wire Servos! 🤯🤖

Added: 2026-05-18

[00:00:00]This servo motor has a hidden superpower. Standard servos operate with a three-pin connector and only move to the commanded position. But, this motor has an extra fourth wire. This wire is directly connected to the internal potentiometer of the motor. So, this servo doesn't just rotate, it reports back the exact angle it is currently holding as a voltage value. In other words, it is aware of its own position.

[00:00:26]Now, we can use the servo not just as an actuator, but as a position sensor. When you manually move the motor arm, we can save these position values to memory second by second.