Alcohol sensor MQ-3 module - semiconductor - Waveshare 9530

Index: WSR-05519 EAN: 5904422364533

Module with the alcohol sensor MQ-3 with the goldpin pins, pitch of 2.54 mm. It is powered with the voltage from 2.5 V to 5 V. It has digital and analog output, making it compatible with most of the commissioning modules including Arduino.

Alcohol sensor MQ-3 module - semiconductor - Waveshare 9530
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Manufacturer: Waveshare
Compatibility: Arduino


The sensor determines the concentration of alcohol in the air, the result can be obtained measuring the voltage on the analog output. The system is powered with the voltage from 2.5 V to 5 V. It has a digital and analog output, making it compatible with mostof the commissioning modules including Raspberry PiandArduino.


  • Power supply: from 2.5 V to 5 V
  • Analog and digital output
  • Pins: goldpin connectors, 2.54 mm pitch
  • Board sizes: 40 x 21 mm
  • It has mounting holes with the diameter: 2 mm


Specifications and other detailed information can be found in thedocumentation.


The product is compatible with Arduino

The manufacturer providesa sample programforArduinoandSTM32.


Czujnik alkoholu MQ-3 

The module has a connecting cable with female ends


The digital output D0

With the help of placed on the reverse side of the board, potentiometer, set is the threshold, exceeding of which, causes the output D0 changing from a high to a low status. The pin D0 can be linked directly with a microcontroller or commissioning set, including Arduino, or for example, a module with a buzzer, which will signal a too low or too high level of alcohol in the air.


Analog output A0

The sensor has an analog output A0, which must be connected to the pin of the converter A/D (analog input in Arduino). This will allow you to measure the proportional voltage signal and more accurately determine the level of alcohol.

Czujnik alkoholu MQ-3

Test 3
Package width 5 cm
Package height 1.4 cm
Package depth 7 cm
Package weight 0.01 kg

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Product reviews

Alcohol sensor MQ-3 module - semiconductor - Waveshare 9530


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Wojciech B. 28.08.2021 Confirmed purchase Translated review
It works, although it is difficult to convert the result from the analog pin to anything else (e.g. alcohol concentration). Useless digital pin
Mateusz W. 25.04.2021 Confirmed purchase Translated review
DIY Breathalyzer :)

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