FC-04 Sound Sensor Features
This module consists of a capacitive microphone and an amplifier circuit. The output of this module is analog. This module can be used to measure ambient noise. You can adjust the accuracy of the sensor by using a variable resistor on the device.
FC-04 Sound Module Pinout
FC-04 module has 3 pins:
VCC: Module power supply: 5 V
GND: Ground
OUT: Module output (Analog)
You can see the pinout in the following image.
Required Materials
Hardware C...
801S Vibration Module Features
The 801S vibration sensor module has a digital output pin that gives HIGH output by detecting vibration up to a certain threshold. The sensitivity of this sensor can be adjusted with a potentiometer on the module. The IC on this module is LM358. This module can be used in security systems.
Note
The module's sensitivity is very high.
You can download the datasheet of this module here.
[wpdm_package id='17349']
801S Vibration Module Pinout
This sensor has 3 pins:
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KY-031 Knock Module Features
This module is a spring-based sensor that sends a HIGH signal when a vibration is detected. It can be widely used in security systems, or monitoring. You can easily use it with the Arduino board or any other microcontroller.
Tip
It is recommended to use microcontroller interrupt pins in order to increase accuracy.
You can download the datasheet of this module here.
[wpdm_package id='17426']
KY-031 Knock Module Pinout
This sensor has 3 pins:
VIN: Module power...
GP2Y1010AU0F Dust Module Features
The GP2Y1010AU0F is an optical air quality sensor, designed to sense dust particles. An infrared emitting diode and a phototransistor are diagonally arranged into this device, to allow it to detect the reflected light of dust in air. It is especially effective in detecting very fine particles like cigarette smoke, and is commonly used in air purifier systems.
You can download the datasheet of this module here.[wpdm_package id='18191']
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MQ-7 Smoke Gas Module Features
MQ series sensor uses a small heater inside with an electrochemical sensor in order to measure a different kinds of gas combinations. They can be calibrated, but, in order to do that, a known concentration of measured gas or gases is needed. Gas sensor is an indoor module and is used at room temperature. The MQ-7 sensor has high sensitivity to Carbon Monoxide and is able to detect the concentration of carbon monoxide in the air. The measurable concentration range of this s...
MQ-8 Hydrogen Gas Sensor Features
MQ series sensor uses a small heater inside with an electrochemical sensor in order to measure a different kind of gases combinations. They can be calibrated, but, in order to do that, a known concentration of measured gas or gases is needed. The MQ-8 hydrogen gas sensor is suitable for sensing hydrogen concentrations in the air. The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm. This sensor has a high sensitivity and fast response time.
Note
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MQ-5 Smoke Gas Module Features
MQ series sensor uses a small heater inside with an electrochemical sensor in order to measure a different kinds of gas combinations. This MQ-5 gas detector is used for leak detection of LPG  (Liquified Petroleum Gas), natural gas and city gas. It has low sensitivity to alcohol and smoke.
Note
After turning on the module, wait 2 minutes for the internal heater to warmp up.
You can download the datasheet of this module here.[wpdm_...
MQ-4 Smoke Gas Module Features
MQ series sensors use a small heater inside with an electrochemical sensor in order to measure different kinds of gases combination. This is a simple-to-use compressed natural gas (CNG) sensor, suitable for sensing natural gas (composed of mostly Methane [CH4]) concentrations in the air. MQ-4 has a high switching speed, no noise when switching, and also has a long life.
It has a low sensitivity to alcohol and smoke. The sensor normally has a zero output, and its output inc...
MQ-3 Alcohol Gas Sensor Features
MQ series sensor uses a small heater inside with an electrochemical sensor in order to measure a different kind of gases combination. The MQ-3 sensor is one of the MQ series heater-driven gas sensors that has an internal variable resistance from pin A to pin B, which depends on the amount of alcohol in the air. The sensor's output is an analog resistance. This sensor can measure the alcohol concentration in human blood alcohol gas on your breath. Alcohol decreases the i...
MQ-135 Smoke Gas Sensor Module Features
MQ series sensor uses a small heater inside with an electrochemical sensor in order to measure different kinds of gas combinations. The MQ-135 sensor is a sensor for detecting air quality. This sensor is able to detect smoke, CO2, ammonia, alcohol and benzene in the air.
Note
After turning on the module, wait for 2 minutes until the inside heater warms up.
You can download the datasheet of this module here.[wpdm_package id=...
