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You can select one of three addresses so you can have up to three sensors onone board - each with a different i2c address
They are often referred to as PIR
Capacity: 3300 uf
Input Voltage: 3
Piezo( knock) Sensor (350mm) RS232-TTL You can select one ofIntroduction: 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:
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