ROBODATECH / LEARN & BUILD

A workshop for curious minds

Understand it.
Build it.
Make it move.

Explore the science inside a robot. Clear visual lessons, hands-on experiments, and practical paths from your first circuit to intelligent motion.

Find your next lesson ↗Build your first robot →

ControllersSensorsActuatorsControl

01 / THE ROBOT SYSTEM · Sense. Decide. Act. Repeat.

Start with a concept→Explore the interactive model→Put it to work

One robot. Four connected ideas.

Learn what each part does, then see how they work together.

01 / Sense

Measure distance, position, and motion.
Explore sensors →

02 / Decide

Choose a controller and organize its work.
Meet the controllers →

03 / Move

Match a motor and driver to your load.
Understand actuators →

04 / Correct

Use feedback to track a target.
Close the loop →

Try it yourself

Change an input.
See what follows.

A simplified learning model. Values describe the model, not a connected robot.

Left wheel speed (m/s)Right wheel speed (m/s)

The learning library

Follow your curiosity.

Find a lesson

Controllers

Choose the brain of your robot.

Compare current microcontrollers and hybrid boards by timing, interfaces, connectivity, and the work your robot needs to do.

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Sensors

Help your robot understand its surroundings.

Distance, motion, position, and vision sensors turn physical events into useful measurements. Learn what each can tell you—and what it cannot.

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Actuators

Turn a command into movement.

Match motors, servos, and linear actuators to the load. Understand torque, speed, current, feedback, and the driver between your code and the mechanism.

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Control

Make motion follow a target.

Learn error, feedback, proportional control, integral action, derivative damping, and the practical limits of a real robot.

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Control

Understand how two wheels steer.

Relate left and right wheel speeds to forward velocity, turning rate, and the path a differential-drive robot follows.

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Actuators

Move a joint. Position a tool.

Explore joint space, tool space, gearing, inverse kinematics, and trajectory control in a robot arm.

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Control

Connect perception, planning, and control.

See how ROS 2 nodes, hardware interfaces, and local motor loops fit together in a robot you can inspect and debug.

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Projects

Build a system around a real problem.

Connect controllers, sensors, actuators, and feedback in practical inspection, mobile robotics, automation, and assistive projects.

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Projects

Configuration 1: Bluetooth Rover

Control the robot from a phone using HC-05 and Arduino Nano serial commands.

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Projects

Arduino Nano Components and Wiring

Arduino Nano, L293D, motors, HC-05, servo, ultrasonic, IR, RF, battery, and breadboard.

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Foundations

Arduino

Arduino is an open electronics platform that combines a microcontroller board, simple programming tools, and many input/output pins for learning and prototyping.

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Foundations

Arduino Controllers

Arduino controllers come in different sizes and capabilities. Uno is common for beginners, Nano is compact, Mega has many pins, and ESP-style boards add Wi-Fi or Bluetooth.

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Foundations

Bipedal Robots

A bipedal robot walks on two legs. It must shift its center of mass, move joints in sequence, and keep balance while each foot alternates between support and swing.

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Foundations

Bluetooth Serial Module: HC-05 / HC-06

A Bluetooth serial module receives characters from a phone or computer and passes them to the microcontroller through serial pins. Many classroom kits use HC-05 or HC-06; if your board label says HC-04, verify its datasheet and pinout before wiring.

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Foundations

Capacitors

A capacitor stores charge on two plates separated by an insulator. It can smooth power, filter noise, and create timing delays.

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Foundations

Color Code of Resistor

Resistor bands encode numbers. The first two bands are digits, the third is the multiplier, and the tolerance band gives allowed variation.

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Foundations

DC Motor

A DC motor spins when current flows through coils inside a magnetic field. Reversing polarity reverses direction. Changing voltage or PWM duty cycle changes speed.

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Foundations

Differential Drive Robot RC

A differential drive robot steers by changing the speed and direction of the left and right wheels. Equal speeds move straight, different speeds curve, and opposite directions spin in place.

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Foundations

Robotics Concepts Lab

Separate interactive lessons for sensors, electronics, controllers, motors, and robot types. Each page has an animated diagram, working principle, and a small simulation for classroom use.

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Foundations

Inductors

An inductor stores energy in a magnetic field when current flows. It resists sudden current changes and is used in filters, motors, relays, and power circuits.

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Foundations

Microcontrollers

A microcontroller is a tiny computer on a chip. It has a processor, memory, timers, and input/output pins for controlling devices.

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Foundations

Resistor

A resistor limits current and creates voltage drops. Ohm's law says voltage equals current multiplied by resistance.

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Foundations

Servo Motors: Micro and High Torque

A servo motor moves to a commanded angle using internal feedback. Micro servos are light and small; high-torque servos are stronger for arms, steering, and walking robots.

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Foundations

Stepper Motors

A stepper motor moves in small fixed steps. By energizing coils in sequence, the controller can position the shaft accurately without a feedback sensor for simple tasks.

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Foundations

Types of Robots

Robots are grouped by shape, movement, and job. A robot may be mobile, industrial, humanoid, medical, agricultural, underwater, aerial, or educational.

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Foundations

Ultrasonic Sensor

An ultrasonic sensor sends a short sound pulse above human hearing range. The pulse reflects from an object and returns as an echo. The controller measures the time delay and converts it into distance.

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Projects