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These modules come with flash memory to store the fingerprints and work with any microcontroller or system with TTL serial
decorative lighting
Arduino Mega 2560 includes everything the user needs to support the MCU
0 ~ 5V analog output voltage
MQ-2 Gas Sensor module is useful for gas leakage detecting in home and industry
RGB Color Sensor (with IR filter and White LED) TCS34725 1302 These modules come with flashIntroduction: The best color sensor on the market, the TCS34725, which has RGB and Clear light sensing elements. An IR blocking filter, integrated on chip and localized to the color sensing photodiodes, minimizes the IR spectral component of the incoming light and allows color measurements to be made accurately. The filter means you'll get much truer color than most sensors, since humans don't see IR. The sensor also has an incredible 3,800,000: 1
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