Pont en H L9110

Hem vist que el PWM actua sobre una eixida digital ampliant el resultat, i fent que a més a més de valdre 0 (aturat 0V) o 1 (engegat 5V) tinga més possibilitats doncs varia el voltatge de la eixida des de 5V fins 0V incrementalment , cosa en ens permet controlar millor el motor que acoblem.

Fes el muntatge:

Stepper Motor + ESP32-S3

Ara prova el programa PWM-Motor.py :

# PWM-Motor.py

# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

# This example uses an L9110 H-bridge driver to run a DC Motor using two PWM pins.
#  https://www.adafruit.com/product/4489

# Hardware setup:
#   DC motor via L9110 H-bridge driver on two PWM pins that are on their own channels
#   e.g., ESP32-S3 pins GPIO4, GPIO6

import time
import board
import pwmio

from adafruit_motor import motor

PWM_PIN_A = board.GPIO4  # pick any pwm pins on their own channels
PWM_PIN_B = board.GPIO6

# DC motor setup
# DC Motors generate electrical noise when running that can reset the microcontroller in extreme
# cases. A capacitor can be used to help prevent this.
pwm_a = pwmio.PWMOut(PWM_PIN_A, frequency=50)
pwm_b = pwmio.PWMOut(PWM_PIN_B, frequency=50)
motor1 = motor.DCMotor(pwm_a, pwm_b)

while True:
    print("***Prova de DC motor***")

    print("\n Avança lentament")
    motor1.throttle = 0.1
    print("  throttle:", motor1.throttle)
    time.sleep(10)

    print("\n Aturat")
    motor1.throttle = 0
    print("  throttle:", motor1.throttle)
    time.sleep(10)

    print("\n Avança/Forwards")
    motor1.throttle = 1.0
    print("  throttle:", motor1.throttle)
    time.sleep(10)

    print("\n Aturat")
    motor1.throttle = 0
    print("throttle:", motor1.throttle)
    time.sleep(10)

    print("\n Enrrere/Backwards")
    motor1.throttle = -1.0
    print("  throttle:", motor1.throttle)
    time.sleep(10)

    print("\n Aturat")
    motor1.throttle = 0
    print("throttle:", motor1.throttle)
    time.sleep(10)

    print("\n Enrrere lent /Backwards slow")
    motor1.throttle = -0.1
    print("  throttle:", motor1.throttle)
    time.sleep(10)

    print("\nStop")
    motor1.throttle = 0
    print("  throttle:", motor1.throttle)
    time.sleep(10)

    print("\nSpin freely")
    motor1.throttle = None
    print("  throttle:", motor1.throttle)

    print("\n***Motor test is complete***")

Pràctiques de Tecnologia amb CircuitPython

10. Motor amb L9110 (PWM)

Pont en H L9110