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The sensitive material of the MQ135 gas sensor is SnO2
Color: Bright yellow light with clear lens for sharper visibility
3V to 9V EN/UV Current 100 mA BYPASS Voltage -0
Optocoupler to isolate the microcontroller
we can easily reprogram it over USB from a Raspberry Pi or other computer
VP3082 Low Power RS-485 Transceiver (Pack of 100) 0.47µF Electrolytic Capacitor The sensitive material of theFor RS 485 data bus networks, this device is a half duplex transceiver. It completely complies with the TIA EIA 485A standard and is powered by a 5 V supply. This device is appropriate for signaling rates up to 200 kbps over lengthy twisted pair lines since it has controlled output transition periods. Typically less than 0. 6 mA, exclusive of the load, is the minimum supply current required for the device to operate. These devices are perfect for