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Black wire: output signal
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a LOW on BI forces all segment outputs LOW
this shift register is a device that allows additional inputs or outputs to be added to a microcontroller by converting data between parallel and serial formats
Smoke Sensor Module (MQ2) Optical Encoder Black wire: output signalIntroduction: MQ 2 Gas Sensor module is useful for gas leakage detecting in home and industry. It can detect LPG, i butane, propane, methane ,alcohol, hydrogen and smoke. MQ 2 Gas sensor can detect or measure gasses like LPG, Alcohol, Propane, Hydrogen, CO and even methane. The module version of this sensor comes with a Digital Pin which makes this sensor to operate even without a microcontroller and that comes in handy when you are only trying to
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