Sound input module (4-pin)

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SKU: CE09434 Brand: Core Electronics

An all-in-one module for easily sensing sound!

$1.95 AUD, inc GST

$1.77 AUD, exc GST

In stock, ships same business day if ordered before 2PM
Delivered by Tue, 18th of Mar

Quantity Discounts:

25-50 $1.68 (exc GST)
50+ $1.60 (exc GST)
100+ $1.51 (exc GST)

Featuring one analog and one digital threshold output this microphone breakout is really handy to have in your parts library.

The onboard potentiometer adjusts the threshold (note this is a 20-turn potentiometer, it can take a few turns to reach your desired sensitivity).

Features

Onboard LM393 amplifier
Analog microphone output
Audio threshold output
A maker classic KY-038 sound module with lots of community support and libraries

Specifications

Supply voltage (Vcc): 3-5V

Pinout

Pin function	Board silkscreen
Microphone Analog output	AO
Ground	G
Power input	+
Audio threshold	DO

Examples

Raspberry Pi Pico - Micropython

from machine import Pin, ADC
from time import sleep

# Initialization of ADC0
adc = ADC(0) #AO on the sound module to GPIO26

# Initialization of GPIO18 as input
digital = Pin(18,Pin.IN, Pin.PULL_UP) #DO on the module to GPIO18

print("Sound Input Module test")

# Endless loop for reading out the ADC
while True:
    raw_value = adc.read_u16()
    # Conversion from analog value to voltage
    Volt = round(raw_value* 3.3 / 65536, 2)
    digital_value = digital.value()

    # Serial output of the analog value and the calculated voltage
    print("Analog voltage value: " + str(Volt) + " V\t Threshold value: ", end="")

    # Query whether the digital value has changed with serial output
    if digital_value == 1:
        print("reached")
    else:
        print("not reached")
    
    print("----------------------------------------")
    sleep(2)

This product is listed in:

Sensors>Audio & Sound

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