Hello all,
Firstly, I'd like to acknowledge all the forum posts regarding the sensor already, however I still cannot for the life of me figure out how to assemble the heating circuit for this sensor. My knowledge in basic electronics is superficial (more familiar with signal filtering and processing). The sensor requires cyclic heating from 5 V @ 140 mA for 60s to 1.4 V @ 30 mA for 90s. I've tried using a voltage regulator and a coil relay (I keep overheating my pot), but I'm focusing on simply driving the heating circuit by amplifying the Arduino's current maximum of 50 mA using a 2N3904 transistor (powered by a 9V battery). However, I can't get the circuit working properly where 5 V are actually going into the sensor. If someone could draw up a schematic of how I could go about wiring this sensor I would be quite grateful. Or, if you would rather take the time to guide me then feel free to do so as well!