Hello, I'm new to all eletronics and I'm having trouble doing things on my own without following a tutorial and copying what they do when it comes to connect things. I wanted to buy an MQ137 (sensor for ammonia), but where I'm at it's quite difficult and expensive to get. I found one available at an e-store but it comes without that module I see in all pictures. Can I still use that or is it too advanced? I found in a page that it has 6 pins, one goes to Vcc and the other to GND, that I get, and the others I see that I need to connect to an analog pin, but there are some resistors involved and I don't understand how to calculate it. I'd appreciate any help or if you have a link that does it. Thank you! submitted by /u/twaw09 [link] [comments]