hello sir
i wnat to use mq5 or mq6 gas sensors.and want to takea action wahen any gas detect.
so plz help me to give me circuit or adc way or way to connect with microcontroller
Hello Sir,
I need to use MQ6-LPG Gas Sensor for my project.
The datasheet is very much confusing.
I want to send a signal to a controller through an ADC if the gas is detected.
The datasheet gives only Rs/Ro graph.
If i test it using some gas (for eg LPG itself) how can i relate output voltage and input gas concentration?
ie., How do i find the corresponding ppm values for the value of output voltage received?
Should i need the ideal test conditions (temperature, humidity, oxygen) for testing?
Expecting your reply.
Thank you.
Hi all robotshop forums.
@Cbenson;
Thanks for advices. I’m working on a LPG measuring project. On this project I’m using a PIC18F4550 as a microcontroller, a DS1302 RTC chip for date and time, a SD/MMC card for logging gas values with date and time, a 2x20 Blue LCD to see date,time and gas density informations and a MQ6 LPG sensor to sense LPG. For quite some time, I’m searching output voltage values of MQ6 sensor in different density of LPG, but I couldn’t find any exact information about these values. Nowadays I’m trying to see accurate ppm values of LPG on LCD, but I don’t know which ppm value corresponds to which output voltage value on MQ6. Is there ant resources or graph for this? I didn’t understand Ro/Rs graph very much in the MQ6 datasheet.
@Cbenson;
Thanks for replying. I’ve contacted manufacturer 3 days ago but they only send me MQ6 datasheet and Gas Calibration files which I already have. Also I’ve contacted Spurkfun as a supplier, they searched for these information but didn’t find anything and directed me to the manufacturer as you. But i don’t have enough techincal knowledge and research or testing laboratory to calibrate the sensor. What else can I do? How could i get exact ppm values for different output voltages of MQ6?
P.s.: Sorry for my bad english. I hope I can explain myself clearly =)
Thanks for your helpful replies. I hope i can find a suitable source code or calibrated sensor.
Hi everyone! I’m using MQ6 sensor so, i think i can help somebody, this is my schematic and a example of mine.You can do the same picture, ok.
wiring.org.co/learning/basics/airqualitymq135.html
and this: can you contact me by {e-mail removed for user’s privacy, please contact via personal message}. I will give you a file.doc more. good luck!
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Hello Sir I want to know how to program a microcontroller to turn motors as robo wheels according to signals obtained from MQ-6 gas sensor . Plz reply it coz i am using it for my clg project .
Thanx …
Hello sir.
Thanx for the previous reply and i was satisfied with your answer, But i am not going to do that project now. only a minor doubt i have is as:
I want to know what is the basic pin connection for the MQ-6 gas sensor while using it for simple circuit named GAS LEAKAGE ALARM without using the interface SEN-1327 module.
Thanx in advance.
sorry for my poor english…
Plz reply it as soon as possible , so that i can use it in my clg project .
Thank you sir for your reply about MQ-6 sensor, i used it and its working.
Now i want to design a digital clock using 7segment display and 4026,4013,4060 etc. So please send me the circuit diagram or help me regarding this.
Thanx in advance…
hello sir,
I m using MQ7,MQ6 and MQ135 sensor in my project.can you tell me how to calculate the gas concentrations in ppm from the output voltage of the sensor…
thank you
Hi deepakgupta.rf,
Welcome to the RobotShop forum. In order to use the gas sensors, you either need a microcontroller or a sensor interface board. The choice of which interface to use depends on the action you want to take; do you want to send an alert? Do you want to turn a motor? Do you want to light up LEDs? There are inexpensive microcontrollers which can be used (and programmed) to read the sensor input and take action. Feel free to clarify the idea you have in mind and we would be in a beter position to help.
Sincerely,
Hi canavaroski90,
Welcome to the RobotShop Forum. The MQ6 gas sensor datasheet seems to be the only information that is readily available for the sensor. If you need additional information (such as the graph), you may want to try contacting the manufacturer directly.
Sincerely,
Hi canavaroski90,
It seems for now you will need an external reference (for example another sensor which has already been calibrated). We would not be able to provide more than the manufacturer in this regard. Without calibration, it can only be used for relative concentration.
Sincerely,
Hello kutit,
Welcome to the RobotShop Forum! We certainly appreciate when users help each other out and thank you for your post.
Sincerely,
Hi aryan,
Welcome to the RobotShop Forum. How you want a robot to react when it senses different values is entirely up to you. Do you want the robot to locate the strongest gas reading? Do you want a motor to spin when it senses a specific concentration? Unfortunately we cannot provide specific code here (also, you do not mention which microcontroller, which motor controller etc.), though we may be able to help with pseudo code if you can indicate what it is you would like to do.
Sincerely,
The connection should be GND -> Vcc -> Signal (it should be on the silkscreen). If you mean you want the pinout for the sensor itself, you need to refer to the MQ-6 datasheet.
We do not provide design services. You will need a microcontroller connected to the display and program it to do what you want.
Unfortunately we don’t have these products online, though we still have some documents:
MQ5 Datasheet
MQ5 Schematic
MQ6 Datasheet
MQ6 as part of the electronic brick series (with sample code)
We don’t have the MQ135. Hope this can provide the info you seek.
You need to calibrate tour readings with a known reference. Also, the reading process is not as simple as reading an analog value, You need to apply power to a heating element (inside the sensor). See the following link to learn more about using this sensor: instructables.com/id/How-To-Smell-Pollutants/