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Rain Detector Weather Sensor Module (Rain Detector)
This is a nice board to add to your weather station or irrigation automation project
GY-MAX4466 Electret Microphone Amplifier Module Adjustable Gain OUT Amplifier Board 2.4-5V DC (GY-MAX4466 amplifier)
Add an ear to your project with this well-designed electret microphone amplifier. This fully assembled and tested board comes with a 20-20KHz electret microphone soldered on.
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