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can anyone help me with a circuit schemetic of a MQ-7 CO sensor with a PICAXE microchip please.
I am buliding one for my home air monitoring and am not very experienced with circuit diagrams
Any help will be greatly appreciated.
We have alot of people who are good with PIC's. I'm not one of them. But I'm sure you'll find people willing to help with such a poilite and plesantly written question.
This link seems to give a basic explanation of the sensor's workings. Then this link provides a code sample and some comments. That should help get you going. I would start by setting up the sensor and measuring the analog voltages out. The problem with sensors like this is that unless you have some calibrated gasses it becomes a hit skip affair as to gas concentrations in air.
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