Arduino: build a line-following robot
A 2WD robot that follows a black electrical-tape line using three IR reflectance sensors. Bang-bang control done honestly, PID optional.
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#l298n
5 tutorials
Arduino: build a light-following robot with LDRs
A 2WD robot that chases a flashlight beam using two LDR eyes and bang-bang steering. Phototaxis for twelve dollars of parts.
Arduino: build an obstacle-avoiding robot from scratch
A 2WD Arduino robot that drives forward and dodges what is in front of it, using an HC-SR04 on a servo and an L298N driver. The full build, wiring to behavior.
Pico: drive DC motors with the L298N
Wire a Pico to an L298N motor driver, drive one or two DC motors with PWM speed control in MicroPython, and get direction control for free. The start of every wheeled robot.
ESP32: build a 2WD robot base with motor control
Two DC motors, an L298N motor driver, an ESP32, and ultrasonic distance sensors. The base you build a robot on top of.