Monday, 18 Dec 2017

    Theft Resistant By TX-RX Ultrasonic

This Kit will receive waving ultrasonic with frequency 40 KHz continually, which has been sent by part of transmitter, if the ultrasonic wave transmitted by part of it , it can?t be accept by the transmitter well because it blocked by a substance so switch would be active.

- Input voltage 9V - 12V DC
- Censor 40 KHz ultrasonic
- Setting frequency
- Switch normally open

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