Smoke & Gas Sensor for Electronics Projects- MQ2

[@abrahamventura7896]

What is your alternative that you will use for your project? What kind of sensor draws less current? Thanks.

[@MkmeOrg]

A normal smoke detector with the buzzer out either directly to a relay or through the Arduino. Cheers

[@saint09]

What was the alternative sensor you did use for your project?

[@rustythefoxcoon5143]

Hey can you tell us how to wire this thing, power it, and do all that jive? I have a project in mind that this would be handy for.

[@dibyenduganguly3714]

I have tried to get the output on the serial monitor(replaced display with serial and commented out the additional/unnecessary display functions as i don't have that display unit)...but always it shows 0 ppm for all gases...but only analogRead(A0) gives the output...i.e. it changes with the Gas...

[@roshnirajan5141]

any calibration tips for tgs822(acetone sensor)

[@praveenvijapur1411]

sir wht did u do to calibrate the gas volume

[@chennarevanth1479]

What is the preheat time?

[@nileshbhavsar9312]

how to differentiate the level of different gases which is sense by MQ-2 sensor like CO, CH4 smoke etc.

[@tux0751]

i have a problem with my sensor,i used your code but display is LCD,this problem is the values not true,LPG and CO or Smoke cound up to 20401 ppm,i need your explain for me.please :(

[@lfrdo7815]

hello, How much current does it draw?

[@MrQuanticox]

Nice, but in your code there is parameter in line 33: #define RL_VALUE (5) //define the load resistance on the board, in kilo ohms How it is possible to define how much resistance this module has? Is this 5kOhm the proper value?

[@stevesz53]

Hi. Looking to line "#define RL_VALUE (5) //define the load resistance on the board, in kilo ohms" in your code i think than RL value is 5 kohm. Is it true? I am asking about is because on my MQ04 (FC-22) boards i ve found 1 kohm resistor (SMD 102) between sensor and ground. Are you sure than on board which you showed us is 5 kohm resistor? By the way your film is great, but understanding how to find values x,y, and slope (x and y was easy to find but slope ...) of used curves was not explained :). I needed much time to understand it :).

[@bstrickler]

Is this the one you used for killing the 3d printer?

[@MkmeOrg]

Sure did

[@xcfu]

Appreciate your video, really informative. You've given me ideas of detecting CO2 by my indoor plant garden.

[@SufiShahHamidJalali]

Hey, dude, I can't download the code. The page is not accessible. Can you help in getting the code please?

[@RandomMusingsOfLowMelanin]

Can u provide curves for MQ135?

[@e01-j6r]

hello, I would'd like to know how to get the LPGCurve[3] = {2.3,0.21,-0.47} and what 2.3,0.21, -0.47 mean. I read the annotation of the code and the MQ2* datasheet, but I can't find where point1: (lg200, 0.21), point2: (lg10000, -0.59) the 0.21 and -0.59 is, thanks. *MQ2 datasheet(www.seeedstudio.com/depot/datasheet/MQ-2.pdf )

[@nitinkumar29]

I can see that your screen shows CO and Smoke but does it detect smoke? I am confused. Can you please test it with smoke (burning a paper or something) and let me know? Thank you!

[@MkmeOrg]

Nitin Kumar Yep mine worked fine for smoke. I'll try to include that in a future video.

[@kd8bxp]

I think I am missing something, weren't you talking about having this voice announce the reading? Or was I having one of those I'm awake but dreaming moments :-) Any curious about what you will use to voice announce, I can see lots of uses for something like that if the costs were reasonable.

[@MkmeOrg]

LeRoy Miller That comes in a later video- The Adafruit Industries Show and Tell video from last week has the overview until I get the next one out.

[@kd8bxp]

Eric William -MKme Tech I didn't think I was having a awake dream LOL - Looking forward to the next video then, can't wait. I am using a Emic2 speech synthizer in my Hero Robot project, but if there was a cheaper way to do it, I would love that!

[@MkmeOrg]

Arduino Talkie library- it works amazing. Despite people saying it cant be done ;)

[@kd8bxp]

Eric William -MKme Tech well, I look forward to your video, I've never been able to get the Talkie Library to compile, so maybe you'll give a hint :-) I'm sure it's something wacky with my computer

[@kd8bxp]

Eric William -MKme Tech Finally got it to compile :-) Used codebender.cc and it compiled - Told you it was my computer LOL - anyway, that is an amazing library. Very impressed with it, thou, I think for my purposes the EMIC2 is going to work better for what I'm doing. Still I can see a lot of uses for talkie. On the negitive side it takes a lot of memory if you load up all of the "words" it can say. If you just limit it to a few words, it seems very reasonable.

[@Lag80kWow]

What is purpose of the pot in the board? Thanks

[@JimOConnell]

+Felipe Condon (Pipe) It sets the point at which the LED on the sensor turns on and, I believe, the point where the digital pin registers gas. On the analog pin, it seems to do nothing.

[@vunguyen-fg2yk]

can u guide me about 3 curve : ( LPGCurve[3] = {2.3,0.21,-0.47}; COCurve[3] = {2.3,0.72,-0.34} , SmokeCurve[3] ={2.3,0.53,-0.44}; ) please ? .. where is this parameters ? thanks

[@SinhueENES]

Hi. We read the datasheet of Mq-135 sensor, which sense for multiple gases in arduino. However we have a problem because our laptop only read one column, but LCD you read 3 kind of gases, and We do not know what kind of gas we are reading (how we do that?), and furthermore, we want read all gases in several columns with the laptop. is possible to do this? thank so much in advance.

[@MkmeOrg]

+Sinhué Haro Corzo Code is linked in the description :)

[@MyWillyboi]

@EricWilliam Another great video buddy. I ABSOLUTELY dig the "Grenade" from Show and Tell with Adafruit! This video was very useful for myself, I assume it will help many others.

[@MkmeOrg]

MyWillyboi Thanks. That was a fun little project

[@ittybittyinnovations5983]

can gas sensor be powered through nano????

[@MkmeOrg]

+Durga Prasad I have for a long time without issue. Separate power would be best.

[@spokova]

Sir, Is that nokia monochrome display library available in Arduino ??? or is it the entire code for that display control written in the Sketch itself ??? Please explain...

[@MkmeOrg]

Uses a library. They are always called out by the #include in the code.

[@karlng2691]

Can this code be adopted to suit an i2c OLED?

[@MkmeOrg]

Yepp

[@RandomMusingsOfLowMelanin]

Can you write a code for MQ135?

[@MkmeOrg]

+Siddharth Sharma Don't have one sorry.

[@RandomMusingsOfLowMelanin]

Eric William -MKme Tech can you tell the difference in calculations for mq135?

[@nialljamesbuckley]

Hi there - i have made some hypoxia chambers for cell culture experiments and i'm now looking for a relatively precise O2 and CO2 sensor for Raspberry/Arduino. do you have any advice? thanks!

[@MkmeOrg]

Hmm for super accuracy on O2 Im not sure. I'd look into confined space entry analyzers and see what they use (MSA etc) Cheers

[@misperry]

Haha that is awesome! I was just thinking about a project to integrate one of these into home assistant. Great minds think alike. Lol great job and good vid.

[@ExoticPacMan_Arcade]

pls provide connection diagram

[@aqilabbasi4702]

hi dear can u give simulation of this tutorial?Do u have this?

[@MkmeOrg]

Sorry I don't understand

[@aqilabbasi4702]

i need proteus simulation for this project.

[@thismodernlab]

link's dead. :(

[@nileshbhavsar9312]

AIso how to Convert Analog Value into the ppm?

[@MkmeOrg]

Nilesh Bhavsar It's in the code. Cheers

[@muhdiszaki5562]

have u tried vaping on the gas sensor and calculate the amount of toxic in it? stop smoking start vaping

[@MkmeOrg]

+Muhd Iszaki It doesn't work that way. Sorry. Cheers

[@ryantpasaribu3119]

can you show the wiring tutorial please sir?

[@MkmeOrg]

+Ryant Pasaribu Hmm it is just Vref, signal and ground. Not much to it :)

[@ryantpasaribu3119]

ow thanks sir ive lerned the nokia wiring, this is great project to make gas detector, to avoid lpg explosion, thanks

[@aids132]

link for codes is dead

[@MkmeOrg]

+aids132 Nope

[@nizamudeenmohammed8898]

Send me circuit diagram

[@007superfrancis]

Hi I am using MQ2 (www.seeedstudio.com/depot/Grove-Gas-SensorMQ2-p-937.html) with Arduino UNO I am using the codes that read analog data (www.instructables.com/id/How-to-use-MQ2-Gas-Sensor-Arduino-Tutorial/step3/The-Code/) but I get random values at various positions How do I calibrate them and how should the resistor pot be positioned for accurate gas sensing Could u post codes on Calibrating and simple and similar "Arduino code" and differentiates it with respect to the gases.

[@vaibhavbachuwar]

post the code

[@MkmeOrg]

Vaibhav Bachuwar Read the description

[@malaltheshanaikn1635]

good

[@ctorregrosaaj]

No smoke test, so ☟☟☟☟☟☟

[@davemisme]

4 minutes of my life wasted. no information, sigh.

[@ChandanaSDeshpandecrazy]

Hi Eric, is it possible to have the code of gas sensor

[@MkmeOrg]

Chandana S Deshpande In the description