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Author Topic: Wiring MiCS-2710  (Read 5498 times)

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Zeus

Wiring MiCS-2710
« on: January 16, 2012, 11:30:52 AM »
Hello,

I am a kind of new Arduino user and trying to wire e2v MiCS - 2710 gas sensor http://www.e2v.com/e2v/assets/File/sensors_datasheets/metal_oxide/MICS-2710.pdf to my Arduino Mega.

Please help me connect.

Thanks.

Z

Zeus

Re: Wiring MiCS-2710
« Reply #1 on: January 17, 2012, 09:44:01 AM »
Hi,
Someone please help.

Thanks.

bhagman

Re: Wiring MiCS-2710
« Reply #2 on: January 18, 2012, 10:12:42 PM »
I haven't had much experience with gas sensors - maybe someone else here can help?

barragan

Re: Wiring MiCS-2710
« Reply #3 on: January 18, 2012, 10:30:27 PM »
hi, neither do I, but I just wrote to the e2v (enquiries@e2v.com) support people requesting help, I'll await for their answer and will post it asap. We have examples for the futurlec http://futurlec.com/Sensors.shtml mq135 and similar sensors: http://wiring.org.co/learning/basics/airqualitymq135.html
I see from the datasheet this sensor will need a separate power supply which provides 2.5 Volts.

Zeus

Re: Wiring MiCS-2710
« Reply #4 on: January 19, 2012, 06:11:47 AM »
Thanks Barragan and Bhagman.
I will be watching this thread for your update.

Z

Zeus

Re: Wiring MiCS-2710
« Reply #5 on: January 20, 2012, 07:50:09 AM »
May be this is the solution. Diagram attached.
A reply from e2v:

The heater drive is OK (100R + 27R). This will give the correct power.
 
The sensor resistor is too low if using a 5V power supply. According to the 2710 datasheet, the maximum sensor power is 1mW. The minimum value of sensor resistance in air is 800R so the current needs to be limited to about 1mA. With a 5V power supply the smallest series resistance you can use to stay within the 1mW requirement would be 4k2. I suggest using 4k7 to allow some operating margin.
--

for readers, 4k7 = 4.7 Kohms

Comments?

Thanks

Z