arduino sound sensor analog read

Here is a basic code for Interfacing Turbidity Sensor with Arduino. The Arduino Nano 33 BLE Sense is a completely new board on a well-known form factor. The output of this current sensor is analog, so to read it, we can directly measure the output voltage using voltmeter or measure it by using a microcontroller like Arduino through Analog Read pin or ADC pin. The TMP36 temperature sensor is an easy way to measure temperature using an Arduino! This is a list of sensors sorted by sensor type. Open the Arduino IDE software on your computer. 2, Parts and Devices in this project: 1 x arduino UNO. Check the Arduino Sensor Kit - Bundle! Arduino boards are able to read inputs - light on a sensor, a finger on a button, or a Twitter message - and turn it into an output - activating a motor, Methodology. Connect the VCC of the Turbidity Sensor with Arduino 5V, GND to GND & Analog Output to Arduino A0 pin as shown in the image above. The output of Electrode and temperature sensor T1 (LM35) is analog, the P0 pin represents the output of the electrode and the T1 represents the output pin of LM35. Connect the VCC and the ground pin of the sensor to the 5V and ground of the Arduino and the Analog pin of sensor to the A0 of the Arduino. The microcontroller gets the current digital status of the MQ2 gas sensor Input; In the loop function we read the analog and digital value of the MQ2 gas sensor and save the values in different variables. Then we will connect the MQ135 sensor with the Arduino. Components Required. The microphone sound sensor, as the name says, detects sound. 1 x USB cable. For example, when measuring resistance 1kOm - the library returns the result of 80, while the real Arduino reports from the Serial series - the value 500 (out of a possible 1023). Drag a PIR motion sensor from the components panel to your breadboard, so its legs plug into three different rows. Acoustic, sound, vibration. The sensor can measure a fairly wide range of temperature (-50C to 125C), is fairly precise (0.1C resolution), and is very low cost, making it a popular choice. The Arduino Sensor Kit is made for Makers who have just started using Arduino to explore the vast space of electronics and programming. There are a wide variety of these sensors. Connect the Sound Sensor to Seeeduino Lotus's analog It has a potentiometer to adjust the sensitivity of the sensor Read more. The Arduino Sensor Kit is made for Makers who have just started using Arduino to explore the vast space of electronics and programming. The effective distance measuring range for this proximity sensor is 10-80cm. The analog pins are primarily used to read information from sensors (but can also be used as digital outputs 14-19, unrelatedly). Arduino modules tutorials, source code, frizting parts, specifications and connection diagram for Arduino sensors. Any help much appreciated, Chris P.S. Create a wire connecting the leftmost leg to Arduino analog pin A0. The input is converted from analogRead() into voltage, and printed out to the serial monitor of the Arduino Software (IDE). And about voltage = sensorValue * 5.0 / 1024.0;, sensorValue is actually the value we have read from the analog pin A0. 1 x Sound Sensor Module. The main component of the module is a simple microphone, which is based on the L358 amplifier and an electret microphone. Using an Arduino Microphone. The sensor can measure a fairly wide range of temperature (-50C to 125C), is fairly precise (0.1C resolution), and is very low cost, making it a popular choice. By hooking together Arduino and Processing, you can do things like visualize sensor data in real-time, or make a glove with flex sensors in the fingers that makes penguins appear on the screen, or a command console from Processing that controls a giant array of LEDs. The main component of the module is a simple microphone, which is based on the L358 amplifier and an electret microphone. 07 The Air Pressure Sensor. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. 1 x Red LED. Coding in the Arduino language will control your circuit. The output of this current sensor is analog, so to read it, we can directly measure the output voltage using voltmeter or measure it by using a microcontroller like Arduino through Analog Read pin or ADC pin. But when reading an analog signal using the built-in ADC in Proteus - your library produces a result that differs from the real Arduino. 08 The Temperature Sensor. It features the Arduino Sensor Kit + the Arduino Uno Rev 3 at a special price. This post shows how to use the microphone sound sensor with the Arduino board. Let's take a quick look at them: The LED - simple LED that can be turned ON or OFF, or dimmed. The circuit of the Arduino PH meter is shown in figure 1. It features the Arduino Sensor Kit + the Arduino Uno Rev 3 at a special price. For example, when measuring resistance 1kOm - the library returns the result of 80, while the real Arduino reports from the Serial series - the value 500 (out of a possible 1023). The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. At the It gives a measurement of how loud a sound is. The reference seems to indicate the analogRead() takes about 100us, which is good enough for 10khz. Connect the VCC of the Turbidity Sensor with Arduino 5V, GND to GND & Analog Output to Arduino A0 pin as shown in the image above. Sketch. Click to create a wire connecting the rightmost leg to power. It comes with a series of embedded sensors: 9 axis inertial sensor: what makes this board ideal for wearable device 1 Arduino UNO board; 1 330 ohm resistor; 1 4.7K ohm resistor (pull down) 1 LED; Procedure. The effective distance measuring range for this proximity sensor is 10-80cm. You can also add 3 LEDs of a different color to Arduino D3, D4 & D5 Pins. Similarly, supply the Sound Sensor with a 3.3V supply through 3.3V Pin. When the button is pressed, the state is HIGH, otherwise is LOW. This LED glows based on different sound intensities. 1 x USB cable. This is a list of sensors sorted by sensor type. For example, when measuring resistance 1kOm - the library returns the result of 80, while the real Arduino reports from the Serial series - the value 500 (out of a possible 1023). Moreover, we have powered the sound sensor with 5V from Arduino and connected the digital output pin (DO) with GPIO8. Wire up the LED anode (positive, longer leg) to Arduino pin 13. This code will read the analog value from the sensor and display it on the Serial Monitor. So, that equation is used to get the output voltage of the sensor. Any help much appreciated, Chris P.S. Connect the VCC and the ground pin of the sensor to the 5V and ground of the Arduino and the Analog pin of sensor to the A0 of the Arduino. Create a wire connecting the leftmost leg to Arduino analog pin A0. The TMP36 temperature sensor is an easy way to measure temperature using an Arduino! 07 The Air Pressure Sensor. pin: the Arduino pin number you want to read. You can read this and other amazing tutorials onElectroPeak's Connect the analog output of the sensor to Arduino A0 pin and upload the following code on your Arduino board. The output of Electrode and temperature sensor T1 (LM35) is analog, the P0 pin represents the output of the electrode and the T1 represents the output pin of LM35. Sketch. If an object is closer than the shortest distance, it reports a significantly higher analog output and is inconsistent with expected in-range results. 09 The Movement Sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and sends a digital signal on the data pin. Analog-in pins A0 to A5 can interpret voltages between 0 and 5V, and translate that voltage to a value between 0 and 1023 for the Arduino sketch to use. Connect a buzzer to the pin 8 of the Arduino which will start to beep when the condition becomes true. 2, Parts and Devices in this project: 1 x arduino UNO. If an object is closer than the shortest distance, it reports a significantly higher analog output and is inconsistent with expected in-range results. We traditionally call these connections pins because they come from the pins on the IC, but they are actually holes that you can solder wires or header pins to. This example will show you how to read an analog input on analog pin 0. Acoustic, sound, vibration. Arduino boards are able to read inputs - light on a sensor, a finger on a button, or a Twitter message - and turn it into an output - activating a motor, At the Heres a sketch that reads the voltage from the sound sensor connected to A0 which is then displayed on the Arduino IDEs serial plotter. This post shows how to use the microphone sound sensor with the Arduino board. I need to read an analog signal at about 50khz (for maybe 50-500 samples, not sure yet). This module's output is analog and can be easily sampled and tested by a Seeeduino. Basic Turbidity Sensor Arduino Interfacing Code. Find this and other Then we will connect the MQ135 sensor with the Arduino. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and sends a digital signal on the data pin. The sound sensor interfaced with the analog pin A0. does anyone know how fast the digital read is? Arduino boards are able to read inputs - light on a sensor, a finger on a button, or a Twitter message - and turn it into an output - activating a motor, 07 The Air Pressure Sensor. You will need the following components . The effective distance measuring range for this proximity sensor is 10-80cm. The analog pins are primarily used to read information from sensors (but can also be used as digital outputs 14-19, unrelatedly). analog or I2C connectors on the shield. Later on, in the program code, we will configure this GPIO pin as a output pin. and upload the code on your board. For example, when an object is 1 cm away from the sensor, it reports an analogRead() value of 322. Connect the center leg to ground. Wire up the LED anode (positive, longer leg) to Arduino pin 13. The sound sensor module is connected with all 4 pins to the microcontroller. 1 Arduino UNO board; 1 330 ohm resistor; 1 4.7K ohm resistor (pull down) 1 LED; Procedure. ULTRASONIC SENSOR; GPS; Humidity Sensor (DHT22) The DHT-22 (also named as AM2302) is a digital-output, relative humidity, and temperature sensor. 05 The Light Sensor. 1 x Red LED. Now we print the values to the serial output to see the values in the serial monitor of the Arduino IDE. does anyone know how fast the digital read is? The analog pins are primarily used to read information from sensors (but can also be used as digital outputs 14-19, unrelatedly). Moreover, we have powered the sound sensor with 5V from Arduino and connected the digital output pin (DO) with GPIO8. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. 09 The Movement Sensor. Here is a basic code for Interfacing Turbidity Sensor with Arduino. Grove - Sound Sensor. Recent Comments. The reference seems to indicate the analogRead() takes about 100us, which is good enough for 10khz. 05 The Light Sensor. The microphone sound sensor, as the name says, detects sound. KY-023 Dual Axis Joystick Module. It has a potentiometer to adjust the sensitivity of the sensor Read more. analog or I2C connectors on the shield. You can use any appropriate output GPIO pins. You will need the following components . The sound sensor interfaced with the analog pin A0. The output of Electrode and temperature sensor T1 (LM35) is analog, the P0 pin represents the output of the electrode and the T1 represents the output pin of LM35. Then we will connect the MQ135 sensor with the Arduino. Analog-in pins A0 to A5 can interpret voltages between 0 and 5V, and translate that voltage to a value between 0 and 1023 for the Arduino sketch to use. Drag a PIR motion sensor from the components panel to your breadboard, so its legs plug into three different rows. We traditionally call these connections pins because they come from the pins on the IC, but they are actually holes that you can solder wires or header pins to. Connect the center leg to ground. Arduino - Data Types, Data types in C refers to an extensive system used for declaring variables or functions of different types. Connect the Sound Sensor to Seeeduino Lotus's analog This function is used to read the states of digital pins, either HIGH or LOW. The Arduino Nano 33 BLE Sense is a completely new board on a well-known form factor. Learn how to use piezo buzzer with Arduino, how piezo buzzer works, how to connect piezo buzzer to Arduino, how to code for piezo buzzer using Arduino, how to program Arduino step by step. This example will show you how to read an analog input on analog pin 0. Basic Turbidity Sensor Arduino Interfacing Code. The Microphone Sound Sensor. Is this limitation set by the Arduino libraries, or the ATMEGA chip? Wire up the LED anode (positive, longer leg) to Arduino pin 13. Basic Turbidity Sensor Arduino Interfacing Code. Here are a few useful links that you may find useful going forward: There are a wide variety of these sensors. Here Analog pin is connected because the sound sensor is analog. Follow the circuit diagram and make the connections as shown in the image given below. I need to read an analog signal at about 50khz (for maybe 50-500 samples, not sure yet). Heres a sketch that reads the voltage from the sound sensor connected to A0 which is then displayed on the Arduino IDEs serial plotter. For example, when an object is 1 cm away from the sensor, it reports an analogRead() value of 322. In this example, you will learn how to use this sensor with Arduino UNO. The Arduino Sensor Kit is made for Makers who have just started using Arduino to explore the vast space of electronics and programming. The Nano 33 BLE Sense (with headers) is Arduinos 3.3V AI enabled board in the smallest available form factor: 45x18mm! Analog-in pins A0 to A5 can interpret voltages between 0 and 5V, and translate that voltage to a value between 0 and 1023 for the Arduino sketch to use. You can use any appropriate output GPIO pins. I need to read an analog signal at about 50khz (for maybe 50-500 samples, not sure yet). 05 The Light Sensor. Connect the center leg to ground. Now we print the values to the serial output to see the values in the serial monitor of the Arduino IDE. The input is converted from analogRead() into voltage, and printed out to the serial monitor of the Arduino Software (IDE). 1 x Red LED. Circuit Diagram/Connection between Arduino and ECG Sensor AD8232 The AD8232 Heart Rate Monitor breaks out nine connections from the IC. But when reading an analog signal using the built-in ADC in Proteus - your library produces a result that differs from the real Arduino. does anyone know how fast the digital read is? You can read this and other amazing tutorials onElectroPeak's Connect the analog output of the sensor to Arduino A0 pin and upload the following code on your Arduino board. Learn how to use ultrasonic sensor HC-SR04 with Arduino, how ultrasonic sensor works, how to connect ultrasonic sensor to Arduino, how to code for ultrasonic sensor, how to program Arduino step by step. Follow the circuit diagram and make the connections as shown in the image given below. And about voltage = sensorValue * 5.0 / 1024.0;, sensorValue is actually the value we have read from the analog pin A0. You will need the following components . When the button is pressed, the state is HIGH, otherwise is LOW. Coding in the Arduino language will control your circuit. Grove - Sound Sensor. Therefore we can read the digital and analog value of the sound sensor in this example. There are a wide variety of these sensors. The external LED is connected to a digital pin of the Arduino microcontroller and to prevent the LED against too high voltages, we use a resistor in series of 220. Using an Arduino Microphone. Recent Comments. The cathode pin is grounded with Arduino ground and sound sensor ground. 1 x USB cable. You can use any appropriate output GPIO pins. Acoustic, sound, vibration. 2-I know the ADC converts analog to digital signals on a PCB but i will love to know how the ADC actually relates with the input and output electrical components on an optical transceiver,on an optical receiver and on a transimpedance pcb 3-Can i use a UART/USART in conjuction with the op-amps in an optical receiver pcb You can also add 3 LEDs of a different color to Arduino D3, D4 & D5 Pins. The reference seems to indicate the analogRead() takes about 100us, which is good enough for 10khz. This module's output is analog and can be easily sampled and tested by a Seeeduino. The sensor can measure a fairly wide range of temperature (-50C to 125C), is fairly precise (0.1C resolution), and is very low cost, making it a popular choice. That value is between 0 (equivalent to 0 Volts) and 1024 (equivalent to 5 Volts). Click to create a wire connecting the rightmost leg to power. You can read this and other amazing tutorials onElectroPeak's Connect the analog output of the sensor to Arduino A0 pin and upload the following code on your Arduino board. In the figure below you can see the most common used with the Arduino. The circuit of the Arduino PH meter is shown in figure 1. And about voltage = sensorValue * 5.0 / 1024.0;, sensorValue is actually the value we have read from the analog pin A0. This post shows how to use the microphone sound sensor with the Arduino board. Arduino modules tutorials, source code, frizting parts, specifications and connection diagram for Arduino sensors. It has a potentiometer to adjust the sensitivity of the sensor Read more. We traditionally call these connections pins because they come from the pins on the IC, but they are actually holes that you can solder wires or header pins to. Since the sound sensor board produces a changing voltage, well need the Arduinos analog-to-digital converter to process that voltage. In this example, you will learn how to use this sensor with Arduino UNO. 08 The Temperature Sensor. This function is used to read the states of digital pins, either HIGH or LOW. It comes with a series of embedded sensors: 9 axis inertial sensor: what makes this board ideal for wearable device 10 The OLED Screen. So, that equation is used to get the output voltage of the sensor. The external LED is connected to a digital pin of the Arduino microcontroller and to prevent the LED against too high voltages, we use a resistor in series of 220. Therefore we can read the digital and analog value of the sound sensor in this example. But when reading an analog signal using the built-in ADC in Proteus - your library produces a result that differs from the real Arduino. The microcontroller gets the current digital status of the MQ2 gas sensor Input; In the loop function we read the analog and digital value of the MQ2 gas sensor and save the values in different variables. Coding in the Arduino language will control your circuit. The TMP36 temperature sensor is an easy way to measure temperature using an Arduino! KY-023 Dual Axis Joystick Module. 10 The OLED Screen. Using an Arduino Microphone. Arduino is an open-source electronics platform based on easy-to-use hardware and software. Connect a buzzer to the pin 8 of the Arduino which will start to beep when the condition becomes true. In the figure below you can see the most common used with the Arduino. Connect the Sound Sensor to Seeeduino Lotus's analog Check the Arduino Sensor Kit - Bundle! The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. For example, when an object is 1 cm away from the sensor, it reports an analogRead() value of 322. Circuit Diagram/Connection between Arduino and ECG Sensor AD8232 The AD8232 Heart Rate Monitor breaks out nine connections from the IC. Here are a few useful links that you may find useful going forward: This example will show you how to read an analog input on analog pin 0. ULTRASONIC SENSOR; GPS; Humidity Sensor (DHT22) The DHT-22 (also named as AM2302) is a digital-output, relative humidity, and temperature sensor. The output of this current sensor is analog, so to read it, we can directly measure the output voltage using voltmeter or measure it by using a microcontroller like Arduino through Analog Read pin or ADC pin. Before we move on to how to interface a sound sensor with Arduino, lets first take a look at the sound sensor module well be using for the tutorial! Drag a PIR motion sensor from the components panel to your breadboard, so its legs plug into three different rows. The Nano 33 BLE Sense (with headers) is Arduinos 3.3V AI enabled board in the smallest available form factor: 45x18mm! pin: the Arduino pin number you want to read. In the figure below you can see the most common used with the Arduino. The sound sensor interfaced with the analog pin A0. Therefore we can read the digital and analog value of the sound sensor in this example. The main component of the module is a simple microphone, which is based on the L358 amplifier and an electret microphone. The external LED is connected to a digital pin of the Arduino microcontroller and to prevent the LED against too high voltages, we use a resistor in series of 220. KY-023 Dual Axis Joystick Module. Click to create a wire connecting the rightmost leg to power. The Microphone Sound Sensor. +5V from Arduino is connected to Vcc of the module where GND pin to GND. Learn how to use ultrasonic sensor HC-SR04 with Arduino, how ultrasonic sensor works, how to connect ultrasonic sensor to Arduino, how to code for ultrasonic sensor, how to program Arduino step by step. Since the sound sensor board produces a changing voltage, well need the Arduinos analog-to-digital converter to process that voltage. Later on, in the program code, we will configure this GPIO pin as a output pin. So, that equation is used to get the output voltage of the sensor. Here Analog pin is connected because the sound sensor is analog. When the button is pressed, the state is HIGH, otherwise is LOW. Arduino is an open-source electronics platform based on easy-to-use hardware and software. Arduino modules tutorials, source code, frizting parts, specifications and connection diagram for Arduino sensors. Moreover, we have powered the sound sensor with 5V from Arduino and connected the digital output pin (DO) with GPIO8. That value is between 0 (equivalent to 0 Volts) and 1024 (equivalent to 5 Volts). 2, Parts and Devices in this project: 1 x arduino UNO. and upload the code on your board. Learn how to use ultrasonic sensor HC-SR04 with Arduino, how ultrasonic sensor works, how to connect ultrasonic sensor to Arduino, how to code for ultrasonic sensor, how to program Arduino step by step. Follow the circuit diagram and make the connections as shown in the image given below. +5V from Arduino is connected to Vcc of the module where GND pin to GND. Later on, in the program code, we will configure this GPIO pin as a output pin. This code will read the analog value from the sensor and display it on the Serial Monitor. Grove - Sound Sensor can detect the sound intensity of the environment. Let's take a quick look at them: The LED - simple LED that can be turned ON or OFF, or dimmed. Open the Arduino IDE software on your computer. This function is used to read the states of digital pins, either HIGH or LOW. 1 x Sound Sensor Module. Check the Arduino Sensor Kit - Bundle! Grove - Sound Sensor can detect the sound intensity of the environment. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. Learn how to use piezo buzzer with Arduino, how piezo buzzer works, how to connect piezo buzzer to Arduino, how to code for piezo buzzer using Arduino, how to program Arduino step by step. Here is a basic code for Interfacing Turbidity Sensor with Arduino. 1 Arduino UNO board; 1 330 ohm resistor; 1 4.7K ohm resistor (pull down) 1 LED; Procedure. It gives a measurement of how loud a sound is. Using the sound sensor module to detect surrounding sound, this sound sensor can only detect if have voice or not, can not measure sound volume, level of sensitivity is adjustable. Arduino - Data Types, Data types in C refers to an extensive system used for declaring variables or functions of different types. Using the sound sensor module to detect surrounding sound, this sound sensor can only detect if have voice or not, can not measure sound volume, level of sensitivity is adjustable. Recent Comments. +5V from Arduino is connected to Vcc of the module where GND pin to GND. Arduino is an open-source electronics platform based on easy-to-use hardware and software. The sound sensor module is connected with all 4 pins to the microcontroller. The microphone sound sensor, as the name says, detects sound. The sound sensor module is connected with all 4 pins to the microcontroller. Connect a buzzer to the pin 8 of the Arduino which will start to beep when the condition becomes true. Here Analog pin is connected because the sound sensor is analog. 06 The Sound Sensor. Is this limitation set by the Arduino libraries, or the ATMEGA chip? Arduino - Data Types, Data types in C refers to an extensive system used for declaring variables or functions of different types. 2-I know the ADC converts analog to digital signals on a PCB but i will love to know how the ADC actually relates with the input and output electrical components on an optical transceiver,on an optical receiver and on a transimpedance pcb 3-Can i use a UART/USART in conjuction with the op-amps in an optical receiver pcb analog or I2C connectors on the shield. This LED glows based on different sound intensities. 10 The OLED Screen. Components Required. It features the Arduino Sensor Kit + the Arduino Uno Rev 3 at a special price. The Nano 33 BLE Sense (with headers) is Arduinos 3.3V AI enabled board in the smallest available form factor: 45x18mm! Let's take a quick look at them: The LED - simple LED that can be turned ON or OFF, or dimmed. Find this and other 06 The Sound Sensor. The cathode pin is grounded with Arduino ground and sound sensor ground. Circuit Diagram/Connection between Arduino and ECG Sensor AD8232 The AD8232 Heart Rate Monitor breaks out nine connections from the IC. Similarly, supply the Sound Sensor with a 3.3V supply through 3.3V Pin. The Arduino Nano 33 BLE Sense is a completely new board on a well-known form factor. The cathode pin is grounded with Arduino ground and sound sensor ground. Similarly, supply the Sound Sensor with a 3.3V supply through 3.3V Pin. By hooking together Arduino and Processing, you can do things like visualize sensor data in real-time, or make a glove with flex sensors in the fingers that makes penguins appear on the screen, or a command console from Processing that controls a giant array of LEDs. Components Required. Methodology. Sketch. In this example, you will learn how to use this sensor with Arduino UNO. Before we move on to how to interface a sound sensor with Arduino, lets first take a look at the sound sensor module well be using for the tutorial! Here are a few useful links that you may find useful going forward: Methodology. Since the sound sensor board produces a changing voltage, well need the Arduinos analog-to-digital converter to process that voltage. Create a wire connecting the leftmost leg to Arduino analog pin A0. By hooking together Arduino and Processing, you can do things like visualize sensor data in real-time, or make a glove with flex sensors in the fingers that makes penguins appear on the screen, or a command console from Processing that controls a giant array of LEDs. pin: the Arduino pin number you want to read. The Microphone Sound Sensor. Grove - Sound Sensor can detect the sound intensity of the environment. At the ULTRASONIC SENSOR; GPS; Humidity Sensor (DHT22) The DHT-22 (also named as AM2302) is a digital-output, relative humidity, and temperature sensor. Open the Arduino IDE software on your computer. It comes with a series of embedded sensors: 9 axis inertial sensor: what makes this board ideal for wearable device and upload the code on your board. Connect the VCC and the ground pin of the sensor to the 5V and ground of the Arduino and the Analog pin of sensor to the A0 of the Arduino. 2-I know the ADC converts analog to digital signals on a PCB but i will love to know how the ADC actually relates with the input and output electrical components on an optical transceiver,on an optical receiver and on a transimpedance pcb 3-Can i use a UART/USART in conjuction with the op-amps in an optical receiver pcb The microcontroller gets the current digital status of the MQ2 gas sensor Input; In the loop function we read the analog and digital value of the MQ2 gas sensor and save the values in different variables. Quick look at them: the LED - simple LED that can easily! 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