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4 Stage Timer With DS3231RTC Module.

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Interfacing KY038 sound sensor with Raspberry pi Pico

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Micropython code from machine import Pin #importing Pin Class from machine module. import utime #importing time module led=Pin(15,Pin.OUT)  #created an led object and assigning the GPIOPin 15 to as an OUTPUT button=Pin(16,Pin.IN,Pin.PULL_DOWN) #created an object button and assigned to GPIO Pin 16 as an INPUT PULL_DOWN. def led_toggle(irq): #created a function led_toggle.     global led     led.toggle()       button.irq(trigger=Pin.IRQ_RISING,handler=led_toggle)  
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Interfacing MQ2 Gas & Smoke Sensor With Raspberry Pi Pico

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Click on the link below to Download the Code from GITHUB https://github.com/anokhramesh/MQ2Gas-and-Smoke-with-Raspberry-pi-pico import machine,time from machine import Pin,PWM import utime MQ2 = machine.ADC(26) led_red = Pin(14,Pin.OUT) led_green = Pin(15,Pin.OUT) buzzer = PWM(Pin(13)) conversion_factor =3.3/(65535) while True:     smoke_value = MQ2.read_u16()     voltage =MQ2.read_u16()*conversion_factor     print("Smoke_value is",smoke_value)     #print("Voltage is",voltage)     utime.sleep(4)     if smoke_value<=6000:         led_green.toggle()         time.sleep(0.2)     else:         led_green.off()              if smoke_value>=10000:         buzzer.freq(500)         buzzer.duty_u16(90000)         time.sleep(0.9)         buzzer.duty_u16(0)         time.sleep(0.7)         buzzer.duty_u16(1)         led_red.on()         time.sleep(0.2)     else:         led_red.off()         buzzer.deinit()         
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