My First Robot: How to Learn Robotics from Zero

Your first robot does not need to be big or expensive. It needs to work — and to teach you something every time it doesn't. This guide is the starting point for anyone in Georgia who wants to learn robotics from zero: pupils, students, parents and teachers.

Robotics joins three fields: mechanics (body, wheels, motors), electronics (sensors, boards, wires, batteries) and programming (the instructions that decide what the robot does). Every robot, from a school line follower to a factory arm, repeats one loop:

• sense — sensors measure the world: a line on the floor, a wall, an opponent;
• think — a controller reads the sensors and decides;
• act — motors move the robot, the world changes, and the loop starts again.

That is why robotics is one of the best ways into technology: your code acts in the real world, and you see your mistakes at once. Building a robot teaches a technological way of thinking — splitting a problem into parts, testing, improving.

The Georgian Robotics Association (GRA) has run school robot competitions since December 2022 — see our championships year by year.

The first diagram shows a simple mobile robot:

1. Sensors — the robot's senses. An ultrasonic distance sensor times an echo to measure how far a wall is; an IR reflectance sensor (TCRT5000 / QTR style) shines infrared light at the floor and tells a black line from a white surface. Buttons, gyroscopes and cameras are sensors too.
2. Controller — a small computer: usually a microcontroller board (Arduino-class or ESP32-class), or a single-board computer when you need a camera. It runs your program in a loop, many times a second.
3. Motor driver — a microcontroller pin gives only a few milliamps; a motor needs far more. The driver (an H-bridge) switches the battery's current to the motor, forward or back, and sets the speed with PWM — fast on/off pulses.
4. Motors — usually small DC gear motors: the gearbox trades speed for force (torque). Servos turn to an angle, steppers move in exact steps.
5. Battery — AA/NiMH cells, Li-ion cells or a LiPo pack.
6. Switch — one switch that cuts all power and is easy to reach.

Black arrows are signals, red lines are power. The dashed arrow closes the loop: the robot moves, and its sensors see a new world.

The classic first robot has two driven wheels and a free-rolling ball (a caster) at the back. It steers like a tank: this is called differential drive. In the second diagram:

1. the ultrasonic sensor at the front;
2. two IR line sensors underneath, one on each side of the line;
3. the controller board;
4. the motor driver;
5. two gear motors with wheels (N20 or the yellow "TT" type);
6. the caster;
7. the battery, mounted low;
8. the power switch;
9. the red arrows: if the left wheel turns faster than the right, the robot turns right — that is all steering is.

Build it in steps and test each one:

1. Mount the motors, wheels and caster on a flat chassis (a kit plate, plywood or a 3D-printed plate).
2. Upload the Blink example to the board — now you know your tools work.
3. Connect the motor driver and spin each wheel forward and back on its own.
4. Add the switch and the battery; check the polarity twice before switching on.
5. Make the robot drive a square — you will learn how different two "identical" motors are.
6. Add the distance sensor: the robot should stop or turn before a wall.
7. Add the line sensors: the robot should follow black electrical tape on a light floor.

A good target is GRA's school competition: in its 2026 rules the robot weighs at most 1 kg, fits in a 180 × 280 mm box and starts moving within 5 seconds of pressing its start button.

Battery safety: charge Li-ion and LiPo cells only with the right charger (a balance charger for LiPo) and never leave them charging unattended; never short-circuit or fully drain them; retire a swollen or damaged battery.

Don't try to learn everything first — learn what your robot needs next. A sensible order:

• Electronics basics — voltage, current and resistance (Ohm's law), why an LED needs a resistor, how a breadboard is connected inside, digital and analog signals, PWM. Get a cheap multimeter and use it every day: most "dead" robots have a loose wire or a flat battery.
• Programming — block coding (Scratch-style editors) is a fine start for younger pupils; then Arduino C++: variables, conditions, loops, functions, reading sensors, timing without delay(). Later a state machine (search → follow → stop) will organise any robot program.
• Mechanics — torque and speed, gear ratios, the centre of gravity, wheel grip, lock nuts against vibration, parts that are easy to replace.
• Soldering — twisted wires fail sooner or later. Learn to tin a wire, heat the joint rather than the solder, and cover it with heat-shrink.

Soldering safety: the tip is around 350 °C — always put the iron back in its stand; work in a ventilated room (flux smoke irritates the airways); wear safety glasses when you cut component leads; wash your hands afterwards.

An electronics course or a robotics club speeds all this up a lot, but free tutorials and steady practice work too.

Many schools, clubs and centres in Georgia offer a robotics course. When you choose one, for yourself or your child, check for:

• hands-on work from the first lesson — every pupil (or pair) works on a real robot;
• electronics and programming together — the circuit is explained, not only the code blocks;
• a path forward — from blocks to text code, from a kit to your own design;
• projects and challenges — a line, a labyrinth, a SUMO ring: a real goal teaches faster than separate exercises;
• small groups and enough equipment — waiting for your turn is not learning;
• safe workshop habits — batteries, soldering, tools;
• teamwork and presenting your own robot;
• a real event at the end — a school competition or a championship gives the course a clear deadline.

After a good robotics training course you can build your next robot without the teacher.

Robots improve with deadlines. Some ways in:

1. A school team — 2–5 pupils and a teacher or mentor. Our guide School robotics: how to start at school explains the line following, zigzag and labyrinth tasks.
2. The school competition — in 2026 GRA's School Robotics Competition was held for grades 7–12 on a zigzag and in a labyrinth, free for schools.
3. SUMO and Line Follower — autonomous robots for older pupils and students; under GRA's 2026 rules anyone from age 14 could enter, school teams too. Read our SUMO guide and about the 2026 championship.
4. Combat robots — remote-controlled machines for experienced teams: weight classes, teams and safety, and ROBO BATTLE 2026 on 21 November 2026 in Tbilisi, international for the first time.
5. RC cars — the 2026 RC car racing championship.

At our events you meet teams and mentors, and the GRA network lists the schools and organisations we work with. Volunteering at a competition is the fastest way to see hundreds of robots up close.

1. Build the two-wheel robot and make it drive a square.
2. Teach it to follow a line and to stop before a wall.
3. Join or start a team, and pick one event on the competitions page as your goal.
4. Read the current rules early — each championship publishes them on its own page — and build to them.

More practical guides are on the way; you will find them all under the Guides tag.