Published:2009/6/17 23:04:00 Author:May | From:SeekIC
A GC Electronic P/N J4-815 ultrasonic transducer is used in this 40-kHz transmitter for remote-control application.
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http://www.seekic.com/circuit_diagram/Remote_Control_Circuit/ULTRASONIC_REMOTE_CONTROL_TRANSMITTER.html
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