A stepper motor allows electrical pulses to be converted into angular movement.There are three main types of stepper motors:Variable reluctance motorPermanent magnet motorHybrid motor, which combines both technologiesFor this project with the Raspberry Pi Pico, we will use a permanent magnet motor, specifically the 28BYJ-48 model.Stepper motors are ideal for precise angular positioning, such as in printers, scanners, and hard drives. They offer several advantages: they are affordable, easy to use, hold their position when stopped, can rotate continuously in either direction, and allow precise control of rotation.Here is the wiring diagram for connecting the stepper motor to a Raspberry Pi Pico: // Raspberry Pi Pico + Stepper Motor Example #define DIR_PIN 2 #define STEP_PIN 3 void setup() { pinMode(STEP_PIN, OUTPUT); pinMode(DIR_PIN, OUTPUT); digitalWrite(STEP_PIN, LOW); } void loop() { // Move 200 steps (one rotation) CW over one second digitalWrite(DIR_PIN, HIGH); for (int i = 0; i < 200; i++) { digitalWrite(STEP_PIN, HIGH); digitalWrite(STEP_PIN, LOW); delay(5); // 5 ms * 200 = 1 second } delay(500); // Wait half a second // Move 200 steps (one rotation) CCW over 400 millis digitalWrite(DIR_PIN, LOW); for (int i = 0; i < 200; i++) { digitalWrite(STEP_PIN, HIGH); digitalWrite(STEP_PIN, LOW); delay(2); // 2 ms * 200 = 0.4 seconds } delay(1000); // Wait another second }