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Black wire: output signal
Aluminium single servo horn
I2C and SPI
The MPU9250 has the needed pull-up and pull-down resistors for the I2C/SPI lines and the address select and the frame synchronization pin
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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