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Comparator output signal clean wave well
One key taking pictures and zoom the objective
The gas sensing material used in the MQ-4 gas sensor is tin dioxide (SnO2) with low conductivity in clean air
That means you can seperately measure infrared
serial mode
LM317 DC-DC Step Down Converter Module Curved Tweezer Comparator output signal clean waveIntroduction : LM317 DC DC Step Down Converter Module Features : Input voltage: 4. 25 40V DC Output voltage: 1. 25 37V DC (input voltage 2. 5V) Maximum output current*: 1. 5A (2. 2A peak) Module type: Linear voltage regulator Protection features: Short circuit protection: Yes Polarity protection: No (so pay close attention to the + and when connecting the module) Thermal protection: Yes (output is automatically turned off when overheated) Working