the.com/servo
A motor with a job, a sensor, and zero patience for being wrong.
means A small self-correcting motor-and-sensor unit that moves to a precise position and holds it, adjusting itself if it's pushed off course.
from Short for 'servomechanism,' built from Latin 'servus' meaning 'slave' or 'servant' — the same root as 'service' and 'serve.' The name was literal: a servo exists purely to obey a command signal and correct any deviation from it, feedback loop and all. The clipped form 'servo' caught on in English through the 20th century as the devices spread from naval gun-aiming systems into radios, robotics, and eventually hobby airplanes.
- core trick
- constantly checks itself and self-corrects via feedback loop
- secret weapon
- potentiometer tells it exactly where it is
- everywhere
- runs your RC car and the Mars rover
- limited swing
- most only rotate about 180 degrees, not endlessly