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you can monitor changes in the weather
74HC139 IS A dual 2 to 4 line decoder/demultiplexer IC
56MHz) is widely used in electronic locks or customer identification as well as other systems where a small and easy to carry tag is desired
Working frequency: 13
Suitable for DIY solar modules
Gesture Recognition Sensor PAJ7620 incremental you can monitor changes inThis gesture sensor can recognize nine gestures, including moving Up, Down, Left, Right, Forward, Backward, Clockwise, anti clockwise, wave. This gesture sensor is based on PAJ7620 chip with I2C interface. It can be used to detect clockwise counterclockwise rotation and movement directions. The PAJ7620 hand gestures sensor, it permits your hand gestures to be detected by the Arduino board, and then you can use in medical applications or control
