MIcropython RGB controller with TP122 Darlington NPN transistor & 12V RGB led strip

rgb_leds.py

from machine import Pin, PWM
from time import sleep
import random

class RGBLed:
    def __init__(self, red_pin, green_pin, blue_pin, frequency=5000):
        self.red = PWM(Pin(red_pin), freq=frequency)
        self.green = PWM(Pin(green_pin), freq=frequency)
        self.blue = PWM(Pin(blue_pin), freq=frequency)

    def set_color(self, red, green, blue):
        self.red.duty(red*4)
        self.green.duty(green*4)
        self.blue.duty(blue*4)

    def fade(self, r_, g_, b_, delay=0.1):
        for duty in range(0, 255):
            self.set_color(int(r_ /duty), int(g_ /duty), int(b_ /duty))
            sleep(delay)
        for duty in range(255, -1, -1):
            self.set_color(duty, duty, duty)
            sleep(delay)
    
    def random_color(self, delay):
        while True:
            self.set_color(random.randint(0,255),random.randint(0,255),random.randint(0,255))
            sleep(delay)
            
    def smooth(self, delay=1):
        for duty in range(-1,255):
            self.set_color(duty, 255 - duty, int(255/duty))
            sleep(delay)

    def flash(self, on_time=0.1, off_time=0.1, count=5):
        for _ in range(count):
            self.set_color(255,255,255)
            sleep(on_time)
            self.set_color(0, 0, 0)
            sleep(off_time)
            
    def brightness(self, level):
        level = max(0, min(255, level))  # Ensure level is within 0 to 1023
        self.red.duty(level*4)
        self.green.duty(level*4)
        self.blue.duty(level*4) 

    def on(self, red=255, green=255, blue=255):
        self.set_color(red, green, blue)

    def off(self):
        self.set_color(0, 0, 0)

## boot.py
# ----------------------------- #
import time, machine, rgb_leds
from machine import Pin, PWM
from rgb_leds import RGBLed
machine.freq(240000000)

led = rgb_leds.RGBLed(27,26,25)
# Specify the GPIO pins


led.set_color(255, 50, 0)

Resistor: 10k Ohm
esp32
TIP 120/122 transistor