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the last data present on A to D are stored in the latches and the segment outputs remain stable
They are often referred to as PIR
the BM180 also has good temperature sensor
Humidity Range: 20% to 80%
Piezo( knock) Sensor (350mm) RS232-TTL the last data present onIntroduction: A knock sensor is a sensor which produces a voltage in response to some type of physical stress such as a knock or vibration. This is why it's called a knock sensor; it detects knocks. This sensor can be useful when you want a circuit to be able to respond to knocks that a user makes against them to turn on or off some load. Size : 350 mm Connections:
US$ 241.00
US$ 141.00
US$ 348.50
US$ 131.00