Air Quality Monitoring and Alert System using Arduino with MQ135
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- เผยแพร่เมื่อ 13 ส.ค. 2020
- #Arduino #MQ135 #AirQuality #LCD #SerialMonitor
This Arduino Tutorial explain about how to make air quality monitoring and alert system using MQ135 sensor in ppm. MQ135 sensor is useful to measure air quality, co2, alcohol, NH3, etc with proper calibration. AQI is helpful to analyse climate change.
Components: Arduino Board, MQ135 sensor, 16x2 LCD, Potentiometer, Resistor, LED, Buzzer, breadboard.
Code and Interfacing Diagram:
github.com/hirentailor-youtub...
IoT Based Air Quality Monitoring Using ESP-8266 Part-1 : • IoT Based Air Quality ...
IoT Based Air Quality Monitoring Using ESP-8266 on ThingSpeak Part-2 : • IoT Based Air Pollutio...
LCD Arduino Tutorial:
• LCD Interfacing & Prog...
Arduino Project & Code Playlist:
• Arduino Projects and C...
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IoT Based Air Quality Monitoring Using ESP-8266 Part-1 : th-cam.com/video/kdXK3aBL8aE/w-d-xo.html
IoT Based Air Quality Monitoring Using ESP-8266 on ThingSpeak Part-2 : th-cam.com/video/atPnsl0wQAE/w-d-xo.html
Great sir
Bczz of u ,our project came to end
Glad to hear that, it's helpful for you.
Thanks sir this video is very helpful for my science project
Glad to know that its helpful to you. You can ask your doubts here and don't forget to subscribe this channel.
thankyou for the guide i have succed doing this project !
Glad to hear that!
Informative, Helpful 👍
Thanks 😊
Great job 👏❤..... Thank you for nice idea😊
Most Welcome! :)
thank you so much SIR.i tried working with this and it was a success.as u have explained it very well in the video,it was easier to understand and do it as well
Glad to know that you have done it by yourself. Keep it up!
which type of arduino board you use? is arduino uno only or something like arduino uno rev3? can you please say this
Bro, tell me the connections, I can't understand everything.. Please spare your time for connections. Reply point to point
Hii,can you plz tell me the version of the code
Thanks u sir for explaining clearly sir
Most Welcome!
Thank you very much for this valuable video sir. Do we need calibrate a brand new MQ-135 gas sensor module?
I think it will work without calibration too
@@ecit Thank you very much. It really means a lot. I'm an absolute beginner.
nice project . it is working... thanks
Most Welcome!
There is a lot of smog nowadays.
That is a great project
Yes, Environmental pollution is one of the most critical issue now a days
thank you bro
can I use any other gaz sensor like MQ2 or MQ5 bvz I didn't find an MQ135 for quality air
Yes, you can. Only make sure that sensor has analog output.
How to prepare an Arduino based project which can separately measure all components included in AQI and the total AQI? Which arduino processor -Sensors - display are used? Coding? Power supply etc...From where can I get this complete information?
To develop full project, use MQ series sensors (MQ2, MQ6, etc) and PM sensors to get Individual AQI data like PM10, PM2.5, CO etc.
Now apply AQI formula on measured data, so you will get AQI.
I think any 8 bit processor can do this task.
You may refer follow link
create.arduino.cc/projecthub/east-west-university/indoor-air-quality-monitoring-system-5b5244
Don't forget to subscribe this channel to get more videos on time 🙂
Thank you for all and the project is good
I have not designed this project with Proteus, you can go through circuit diagram given in the description
tq response, btw i have completed all the tutorial and finish the circuit however the lcd is on but there's no display on it, you have solution for this sir
@@muhammadazwan3254 if all connections are correct then vary the potentiometer and adjust the contrast
how can I make some modification for the program which added a green led to indicate no input from MQ135 and it shows in LCD "AQ level Good"
if you have an email let me know so we can had our conversation
@@muhammadazwan3254 if there is no input from MQ135 then how can you say that AQ is good?
Well, you can use analogRead pin of MQ135 to do this.
1. If MQ135 values is very low then, you can print on LCD that AQ is good.
You need to add if condition and digitalWrite command.
hirentailor.rf@gmail.com
excuse me, i want to ask if can i use the 4 pin at the back of the lcd for this project….. the pin that i talk about is the vcc grnd sda and that one more pin
It is I2C LCD, for I2C LCD you need to use different library, just go through the internet for I2C LCD code with Arduino Uno
Hello Sir, What is the value of the potentiometer and the two resistors that you've used? I have a 10k ohm trimpot potentiometer available with me right now, hope it will work for this project.
I have used 1K potentiometer but 10K will also work, just adjust the contrast by varying the potentiometer. And resistor with LED is 220 ohm
@@ecit Got is sir, I've just done the wiring according to your video + uploaded the code to UNO. But I do not have buzzer, led and resistors available for now. I will add them next day. However, I've tried running the project without these components but its not working, the LCD is not showing any light only the MQ135 sensor light and ofcourse, the uno lights are indicating. Is this normal or am I doing something wrong?
@@stephanstrange6238 LCD should display the message, just go through the print log mentioned in the code
Goodday, sir please can we have the simulation link on proteus or a video on how you have simulated the project, my team tried simulating it . but the value on the LCD is not changing as i vary the potentiometer
I have not tried this on proteus simulator, however you can debug your message on serial port if LCD is not working on simulator
Sir can i display the air quality index on a P10 display if possible please help me out.
Yes, you can. Following link will be helpful circuitdigest.com/microcontroller-projects/digital-notice-board-using-p10-led-matrix-display-and-arduino
Replace LCD code with p10 code
Thank you shir working nishly
Welcome!
Can we use mq2 istead of mq135 with same code...or should we change code?
Yes, you can. Connect analog output of MQ2 and change threshold value as per your requirement
could you give us simulation circuit of air quality monitoring and alert system using arduino with mq135 on proteus software
Sorry It's not possible now, however you can try it by yourself, You have my circuit diagram and code, you only need to put it in Proteus.
Hi sir how to add ESP8266-01 using blink app, i like to do same project but I don't know how to add ESP8266-01.
You can refer my video th-cam.com/video/kdXK3aBL8aE/w-d-xo.html for MQ-135 with ESP8266. Don't forget to share and Subscribe the channel
How can I add a DHT22 sensor in this project? Can I modify the code provided by you? If yes, please guide.
Yes, you can.
th-cam.com/video/9bag1CPihRk/w-d-xo.html
In the linked video, I have use MQ135 and DHT11, so for DHT22 there will be few minor changes as per the library
Which Aurdino u used in this projects
I have used Arduino Uno, you can use Arduino Nano also, or any other Arduino board.
Hi sir.Did you use male or female jumper wire?also can send link of resistor
I have used 220 ohm resistor and 1K potentiometer 3386P- 1K Ohm 0.5W-Through Hole Trimmer Potentiometer amzn.eu/d/5x3FxN2
Yes, Male female is required. You can search on local store or get it from Amazon
hi sir, i try to do this project by following your tutorial . The lcd is on but it's not display the air quality level. FYI, the buzzer and led is working ,the only problem was from lcd.
Vary the potentiometer, you may get values on LCD
how i use temperature and humidity sensor in this project
th-cam.com/video/4WZ5k333esM/w-d-xo.html
th-cam.com/video/9bag1CPihRk/w-d-xo.html
You can watch this videos and update your codes
Where can I watch the full step by step setup of the wires. I am beginner. Can you show me the full details of the diagram. Where do I connect the lcd?
You can watch my Arduino project playlist
@@ecit thank you
what are the changes to be done if we need to see the same from the internet.tanq for the responce
can u please give the changes with the interfacing diagram and the code .Tanq for the responce
To do get data with internet we need to use ESP8266 wifi module or nodemcu ESP8266 or ESP32.
So I will do it in weekend and provide you code and interfacing diagram.
Tanq so much for your responce. This is for my school project so please give it fast as u can. And again Tanq so soo much for your responce.
Full video link for IoT based Air Quality Monitoring System th-cam.com/video/kdXK3aBL8aE/w-d-xo.html
Plz say which type of LED did you use here?
What are the value of 2 resistors?
Hlo plz rply?
@@fathimanihalak6849 you can use any through hole LED, I have used 220 ohm resistor.
Also useful for Alcohol detection.
can u please upload the video for connection of aurdino with lcd resistor etc
I have already uploaded video to interface LCD, th-cam.com/video/er5CIi76bJ0/w-d-xo.html go through this link
@@ecit thanku so muchh I have completed it
This is because of you! U help me a lot ❤️❤️
@@SandeepSrivastava525 Glad to know that! 😊
@@ecit 😊😊
Tanq for responce
Sir in circuit 2 resistor are used please provide those values
220 ohm
At First it works properly
Gets buzzed when above threshold but after two to three test the value of ppm goes above 700???
What to do
Verify your sensor connection, there may be loose connection with sensor
Should the fire be close to the sensor to measure it? Do you know what the maximum distance is that the mq135 can detect?
Sensor ia detecting the gas not the temperature, you can adjust the sensitivity of sensor to vary the range. I can't say exact distance but may be near about 50 cm to 100 cm
Bro If one's the setup done from laptop should we use another device instead of it
You can use other device after uploading the code into the Arduino board
@@ecit thanks bro best youtuber I have ever seen, bro do one thing give me your no. Cauze we are making a project on this so I have any quarry so I will directly ask you
Bro should we connet arudio board to charger soket instead of laptop plz reply
You can use laptop usb also, it will provide less current
Thanks bro; your videos are always nice
@ECIT Engineering - Can we use 20x4 LCD serial monitor as well?
Yes, you can, you can adjust the position of characters.
sir how to connect the process of ardino board which ardino board we can use it sir
I have used Arduino Uno board
Can i use mq2 and flame sensor together sir? Where to put pin sir?
If it has analog output then use A2 or A3 or any other analog output pin
I want to add both ifttt and thingspeak what changes should I do in code ..I want to mail ,tweet also want to see analysis in thingspeak ....plz help me!!!
th-cam.com/video/atPnsl0wQAE/w-d-xo.html
You need to use ESP8266 or ESP32.
actually I want to do both in single code ..means use both servers in single code how to use plz help me
thingspeak and ifttt
@@crazytrazywithsruandtutu786 randomnerdtutorials.com/esp32-http-post-ifttt-thingspeak-arduino/
This link may be helpful to you
Hello sir.
Can we use the same code to test the air quality in fruits and vegetables
Air quality in fruits? I think No!
@@ecit do u have any suggestions to check the chemicals or chemical quantity present in fruits or vegetables sir?
Good
Thanks
Hello sir, I'm making a air quality monitor. However, I've used an Arduino Uno, 16*2 LCD without i2c, MQ-135 and DHT22 sensors. I've uploaded a code as per my connections but LCD is not working at all. I've also replaced the LCD and even the UNO but still it's not showing anything. Please guide me through.
First make sure that your connection are okay and if you see blocks on LCD screen then vary the potentiometer and adjust the contrast
@@ecit Sorry sir but I haven't used the potentiometer in my project. The LCD is literally not showing anything. But if it is that important, I will consider to add one and then feedback you. JUST IN CASE, these are my UPDATED connections that I'll make including potentiometer:-
1. LCD Connections:
- VSS to GND
- VDD to 5V
- V0 to the middle pin of a potentiometer
- RS to Digital Pin 12
- RW to GND
- E to Digital Pin 11
- D4 to Digital Pin 5
- D5 to Digital Pin 4
- D6 to Digital Pin 3
- D7 to Digital Pin 2
- A to 5V
- K to GND
2. MQ-135 Connections:
- VCC to 5V
- GND to GND
- DO to Digital Pin 6
3. DHT22 Connections:
- VCC to 5V
- GND to GND
- Data to Digital Pin 7
@@gunneetkaur8107 for LCD go through the following video and use potentiometer
th-cam.com/video/er5CIi76bJ0/w-d-xo.html
@@ecit Hello again sir, I've made the project and the LCD is running fine. But the led and buzzer are not working as shown. I didn't have 220 ohm resistor available so I used two 1k resistors.
@@gunneetkaur8107 1K resistor in parallel, right?
also please tell resistor watt value like 1/4,1/2, 1 or 2 watts
1/4 is enough or you may use 1/2 W
please tell which potentiometer you used?
It is 1 KOhm potentiometer (P 103)
Sir I have not able to see the output . The lcd is blank nd I checked my code , wireings but still not working
Vary potentiometer, if you see blocks on screen
I made this project without buzzer and light. The LCD is working fine but the values on it are completely wrong. I've tried calibrating the MQ sensor but the AQ value is either 15-20 or above 1000! Looks like LCD is having error reading from the sensor. How can I solve?
First use serial print and verify data on pc or laptop through serial debugging
@@ecit I used serial monitor also. However, the AQ value on it exceeds no more than 16.
@@ecit I have no idea what I'm doing wrong. My MQ sensor is brand new and I've checked my connections a lot of times.
@@kamaljeetkaur9776 If still wrong then read datasheet of MQ135 module, verify you need to connect 5V or 3.3V, also verify all the wires and there should not be any loose connection
Sir, I am a final year Electrical Engineering student and I am implementing this project. I wanted to know how can we interpret the data from the Arduino with cloud.
th-cam.com/video/kdXK3aBL8aE/w-d-xo.html
This video may help you, there is 2nd part also.
Or else you may interfere WiFi Module with Arduino Uno
@@ecit okay sir , so you are advising to use WiFi module along with Arduino . But how can the data be uploaded on cloud . Is there any view reference for that
@@Oindri_kar which cloud platform do you want to use? In my video with ESP8266 i.e. I have explained how you can upload data to thingspeak. (Part 2)
@@ecit okay thanks even I will be using thingspeak
@@Oindri_kar th-cam.com/video/atPnsl0wQAE/w-d-xo.html
This is my video with thingspeak
excuse me sir, why in esp u dont put the buzzer? because my project using esp32 and i want to put buzzer too hope u notice tq sir
You can add buzzer easily,
You need to define pin for buzzer and then set it high when AQI value is greater than threshold value.
You can refer this code and implement it for ESP32
Can anyone share where to buy the items necessary for the project?
You can buy it from Amazon or local electronic shop
Can we store that serial monitor data everytime in a single file or some files....
Yes, you can interface SD card with Arduino and then you store the data into SD card.
@@ecit After interfacing sd card to aurduino, is there any configuration needs to be changed in the system or we need to make changes in the code...?
If we interface sd card it stores directly or we need to make setting to store..
@@chethankumar3494 create.arduino.cc/projecthub/electropeak/sd-card-module-with-arduino-how-to-read-write-data-37f390
This may be helpful for you
do you have the block diagram and flowchart on how this project works?
From circuit diagram, you can prepare block diagram. And for flow chart, refer the code. First try by yourself and let me know if you any difficulty
could you please draw the block diagram and flowchart then email me the picture? im not good at understanding the circuit
@@Jr-kr8ts ok, will provide you a rough sketch. Don't forget subscribe this channel to get more videos on time.
@@ecit please email me
@@Jr-kr8ts I have uploaded Block Diagram and Flow chart here github.com/hiren-tailor/MQ135-Air-Quality-Arduino
Hope this is helpful to you.
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x20
even after attempt 10 of 10 same problem.
This error is coming. Please help urgent. Please reply. Program is not uploading error
Make sure that you have selected correct COM port, and also make sure that serial port is not busy or serial monitor is not open while uploading the code
Please help me after i remove the mq 135 from the smoke its
Level rises upto 990 plz help me
First verify your connection, you can also adjust the sensitivity resistor behind the sensor. What value it shows during initialisation?
My serial monitor ( JHD162A LCD ) is showing only black squares instead of the air quality, I have used the same code and connections as you, But it still is showing that, what can I do ..pls tell me... I have to finish this in 2 days or I will fail and will not be given a retry
can you make a vid or something to show how to fix that
@ECIT Engineering
help.!!!!!!!!!!!!!!!!!!!!!!!
Have you vary the potentiometer?
I have already published one video on LCD interfacing, you can watch in my Arduino Project playlist
Can we use mq-6 sensor insted of mq-135
MQ 6 is use for gas detection like LPG, butane. So if you want to detect gas then you can use MQ 6
Any change should be done in the code
Thanq for responce
@@vja_minecraft902 yes you need to calibrate MQ 6, refer on internet how to use MQ 6 with Arduino
which type of arduino board we have to use?
Arduino Uno
bro make a video on SMART EMBEDDED FRAMEWORK USING ARDUINO AND IOT FOR REAL-TIME NOISE AND AIR POLLUTION MONITORING AND ALERT SYSTEM
This will be helpful for you th-cam.com/video/kdXK3aBL8aE/w-d-xo.html
Sir due to covid-19. we are doing our project at home how can we generate 5v supply
Use DC battery, it is easily available
Tq u sir
Sir please help me one issue in my project how to notification go through the teacher or student via sms in student mobile
Go through this video : th-cam.com/video/Wp12PD1kKvI/w-d-xo.html
Instead of fire alarm, you can do it for Air Quality also. You can use any SIM800 or SIM900 or SIM7600 module for this.
What code do I use if I use I2C lcd adaptor?
You need to replace LCD code only
May I know what is the input for the air quality? is it measure CO2?
MQ-135 Gas sensor can detect gases like Ammonia (NH3), sulfur (S), Benzene (C6H6), CO2, and other harmful gases and smoke.
If you want to measure CO2 only then you need to calibrate the sensor for CO2.
@@ecit thank you for the information 😁
Hello sir,
I have just connected mq-135 sensor with arduino,But the output im getting is above 10,000 why it is like that, can you please give me a solution for it!!!
First make sure that your connection is ok, there is no loose connection. Is there any change in value? I think maximum value should be 1024, if you have digital multimeter then measure the voltage at output pin and adjust the sensitivity and delay of MQ135 to get accurate results
@@ecit I'm getting values such as 24500,9800,5600,15000 etc
@@thanayb2605 are you using same code as I have uploaded? Or else you can divide your results by 100 unless you get the solution.
anyone tried the given code?
we cannot connect esp8266 with the above circuit sir?
You can connect, watch my video for IoT based AQI measurement using MQ135 and ESP8266 th-cam.com/video/kdXK3aBL8aE/w-d-xo.html
@@ecit thank you for ur response sir
in my LCD the air quality content not showing the display was blank (totally green light showing) please resolve this issue
Is it always blank? Are you able to see printed message on LCD?
Vary the potentiometer, you will be able to see the characters it connection and code is correct.
What is the price of aurdino board you used?
500 INR or may be around $8 to $10
Bro can you make a video on full assembly of this machine as soon as possible cause I'm not getting it😅
It is available in different videos, Just go through the Arduino Projects Playlist on my channel
@@ecit thanks
Bro Im not getting the video you told about
Sir I'm facing problems in accumulation of the components of the project in which to buy and which to not. Please help me sir.
You will need Arduino Uno, MQ135 and connecting wires to display results on computers screen.
If you want to blink LED and Buzzer then use LED, Buzzer and 220 ohm resistor.
If you want to Display result on LCD then buy 16x2 LCD, 1K potentiometer, 220 ohm resistor.
@@ecit Thank you sir for your help and time. Sir I want to know whether is there any specific Arduino UNO which is compatible with the software or whether all the Arduino UNO models available on Amazon from different companies would be compatible with the software?
@@manjitsingh3165 you can use any Arduino Uno board with MCU as ATMega328
@@ecit Thank you very much sir for your help and time.
Can we use Arduino mini for this ?
Yes you can use, make sure you use same pins as mentioned in the code
When I connect everything, my L and RX leds on my Arduino Uno don’t light up like they do in your video. How can I fix this problem?
Are you able to upload the code? It may be possible that you have not selected the correct COM port in Arduino IDE before uploading the code
@@ecitYes I have selected the correct com port and I am able to upload the code. The TX led blinks and the L and RX Led don’t light up at all on the Arduino Uno. Any other possible problems?
@@diamondprod.1008 if you are able to upload the code then there is no issue, LED is not blinking may be because it is faculty or it may have different GPIO.
@@ecit Okay then I can’t find the source of the problem on why my 16x2 led display will only show black boxes, and why my led and buzzer won’t turn on after the air quality is high because I have followed every single wire that you have and the code is the same. What could be wrong in my project?
@@diamondprod.1008 you can vary the potentiometer and see the display, also you can open the serial Monitor and see the logs.
what value of resistance is to taken?
220ohm
how can i use mq135 sensor for detecting pm2.5 ,so2, and co2?
You cannot use MQ135 to measure PM2.5, SO2. You need to use seperate sensor for each of this.
@@ecit what do u meam sir ?? I need to use 2 mq135 sensor? To detect each gasses?
@@jeremytiempo9639 No, I said to measure PM2.5, you need to use different sensor like PMS5003 PM2.5 or Laser PM2.5. with MQ135 you can measure CO2, alcohol, smoke and other gases with proper calibration.
And yes, you need to use seperate MQ135 to detect each gas.
However, there are few sensors which detects all gases, you need to google it.
@@ecit ok .. but some studies they used this sensor to detect pm2.5 by the way thnk u for that information..
@@jeremytiempo9639 sorry, I don't have any about measuring PM2.5 using MQ135.
Sir meri LCD on nhi ho rhi code upload krne ke baad!!!
pr isme light on hai lcd mai!
Have you uploaded code sucessfully? If yes then try to vary potentiometer.
What value should we vary?
@@anushamalik1785 vary 10k potentiometer with lcd or watch this video for details th-cam.com/video/er5CIi76bJ0/w-d-xo.html
if i use the MQ137 module with this same setup will it still work?
Yes it will work, you need to use analog output of your sensor.
@@ecit thank you very much
@@infuric2603 most welcome!
@@ecit Another question. How do I power the setup without plug it in to the computer? Is there a specific voltage to run this setup?
@@infuric2603 you can give external 5v to 9V on Vin pin and GND pin of Arduino
Should we preheat the sensor before using it
No, There is no need to preheat the sensor
Okay sir
Sir es project ka proposal mil skta hey kya
What are the material needed?
I have mentioned in description
U have whole project details in soft form ??
Yes, I have code and Interfacing diagram, anything else you need?
@@ecit yes I need ,how can i access .
@@natureinfocus1630 I have added link to download code in video description. Or else you can click here github.com/hirentailor-youtube/MQ135-Air-Quality-Arduino
From my mistake i orderd 10k ohm resistor instead of 1kohm can i use in this
Plss reply fast
Yes you can use if it is potentiometer
1 K means 0 to 1 K
And 10 K Means 0 to 10K. So no issue you can adjust resistance value as per brightness
Thnku so muchh❤️😊
@@SandeepSrivastava525 do you have resistor or potentiometer?
Srry potentiometer
We want to use this method only for detection of sleep duration and ..... for this can u suggest best on sleep duration measure for apnea patients
Please reply sir
Sleep duration measure using ir sensor lcd . Arduino .blue tooth module.
@@salehafridous396 do you want to measure sleep duration of patient? I think for that you may need to use different sensors. MQ135 is not right sensor for it.
Only ir sensor we want to use
@@ecit we only sleep duration of patients in proteus using ir sensor
And which software is used for writing a code
Arduino IDE, you can watch my first in Arduino project and code playlist
@@ecit tq
how toconnect the ardino board please tell the solution sir
I have already shown in the video and also available in my playlist, what kind of difficulty are you facing with connection?
what adrino model is it
Arduino uno rev3
I dont have a potentiometer can i do this project
yes, pins can be ground and VCC
What kind of arduino and wire that need in that project?
You can use Arduino Uno, list of components I have mentioned in the description
@@ecit what about the wires?
@@demonchild1167 they are simple male female wires
@@ecit can I use only mobile phone to setup its code?
@@demonchild1167 do you mean uploading the code ? Yes, there is one unofficial Arduino app available on Play Store from which you can write and upload the code to Arduino boards
can u plz give a required materials list like all the components asap plz I'm in a hurry
Components: Arduino Board, MQ135 sensor, 16x2 LCD, Potentiometer 1K (P103), Resistor 220 ohm, LED, Buzzer, breadboard. Circuit Diagram available in the description.
@@ecit what in the blue thing above the buzzer ...i actually know nothing about all these so plz help me
@@ritu_armygirl9056 it is potentiometer
@@ritu_armygirl9056 did it work?
@@RK-yk6pg yup
Hello kindly please post a step by step guide please for biggeners like me
Its already step by step, if you have difficulty with LCD interfacing then watch this video th-cam.com/video/er5CIi76bJ0/w-d-xo.htmlsi=vzw17ODKEWC2Uy8J
Or you can watch my Arduino Project playlist for more details.
Sir do you have complete diagram? May I use it for our capstone...
Please refer the link provided in description
I refer to the link provided in description but it wasn't enough and complete. Some of the wiring are not show which I'm confuse where are the others wire are connected because in the video you upload are skipped not starting from the beginning of wiring. Can you make a video or a complete circuit diagram sir for me? I really need it if is it okay if you aren't busy
Can you provide for a complete diagram because it's difficult to trace the wire where it is connected sir?
@@justiniansegundo118 for LCD interface go through this video th-cam.com/video/er5CIi76bJ0/w-d-xo.htmlsi=e2rvDNzxipDLxQUa
@ecit yay! Thank you so much sir for your help! There it is hehehe..
can i get the details name of all the components that be used in this project?
I have mentioned it in the description
Which ohm resistor are used?
220 ohm resistor
@@ecit both?
@@pratikganfade7463 yes both
Whic potentiometer u used in this projects
It is 1 KOhm potentiometer (P 103)
Pls also tell the buzzer and provide the link
And the resitance
@@SandeepSrivastava525 220 ohm, if you want to learn how to calculate LED resistance then go through this video th-cam.com/video/NLgYfyAp_Rg/w-d-xo.html
@@SandeepSrivastava525 you can use 5V passive buzzer, you can buy from nearest Electronics store, or go through this link www.amazon.in/dp/B07MR2KN97/ref=cm_sw_r_wa_awdb_imm_t1_Lpd5FbNR8M53G
Can I use this for mq9
Yes, you can
What should i do if i dont have potientionmeter?
While Interfacing LCD, If you don't have Potentiometer then you can connect,
PIN 1 (VSS) to Ground
PIN 2 (VDD) to +5V
PIN 3 (Vo) to Ground
(These are LCD Pins)
Potentiometer is use to vary contrast, however you can use LCD without potentiometer as per above mention connection.
You can also add small resistor (1ohm to 1k ohm) at PIN 3 to Ground.
@@ecit you means i need 3 resistor For all the circuit? And for another 2 resistor how many K i need to use?
@@farisaziz2048 with LED use 220 ohm,
At LCD PIN 15 (A) use 220 ohms
At LCD PIN 3 (Vo) use 1K to 10K (vary the resistor manually as you don't have Potentiometer)
I hope you have subscribed this channel 🤪😄
@@ecit hahah sure i subscribed . Thanks alot for information . 330 ohm or 220 ohm ?
@@farisaziz2048 you can use 330 also
Where can i find the steps to build this
The code link is mentioned in the description and you can go through my article here www.makerguides.com/air-pollution-monitoring-and-alert-system-using-arduino-and-mq135/
Please leave comment on website if it is helpful for you
Does Arduino nano work as well?
Yes, it will work, make sure you use same pins
Sir is this project IOT based ??
No, for IoT based Air Quality Monitoring watch this video th-cam.com/video/kdXK3aBL8aE/w-d-xo.html