Robotics · Step 1 of 8 · 3 min
What a robot is: sense, think, act
You can break any robot into what it senses, how it decides and how it acts.
Three jobs in a loop
A robot is a machine that senses its surroundings, decides what to do and then acts on the world. Then it does it again, many times a second. That loop is the whole idea.
A robot vacuum feels a bump, decides to turn and spins one wheel. A warehouse arm sees a box, plans a grip and closes its gripper. Different sizes, same loop.
The parts you will meet
Sensors are the senses: distance sensors, cameras, buttons, encoders that count wheel turns. Actuators are the muscles: motors, servos, pumps, grippers. The controller is the brain, from a small microcontroller to a full computer.
Power ties it together. Batteries, regulators and wiring sound boring, but they cause more failed robots than code does.
Robotics is a team sport
Real robots mix mechanical, electrical and software work. You do not need to master all three before you start. Most people begin with software and a kit, then learn electronics as problems appear.
In this track you build up in that order: parts first, then programs, then control, perception, ROS 2 and AI.
Try it
Take a robot apart on paper
- 1.Pick a robot you know: a robot vacuum, a delivery robot or a self-checkout arm.
- 2.Write three columns: sense, think, act. Fill each with what you think it uses.
- 3.Ask a chatbot to check your list and add what you missed.
I am learning robotics. Here is my sense / think / act breakdown of a robot vacuum: [paste]. What sensors, controller and actuators does a typical one really use? Correct me where I am wrong.