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[[num_page_4]]

The Knock Sensor Module KY-031

Name: Electroslab
Price: 0.93 USD
Availability: InStock

$ 1.33 $0.93

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The knock sensor, detects the knocks and the taps. It can work like a switch. The sensor output normally stays at High logic. The spring inside this sensor vibrates when knock or tap is detected and sends pulse or multiple high low pulses.

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