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74HC139 IS A dual 2 to 4 line decoder/demultiplexer IC
SCS20UU is an closed type linear ball bearing with Aluminum block mounted
its got a solid construction
you can monitor changes in the weather
Suitable for DIY solar modules
Gesture Recognition Sensor PAJ7620 incremental 74HC139 IS A dual 2This 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
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