The long-distance alarm raster circuit

Published:2011/7/8 1:43:00 Author:Seven | Keyword: long-distance, alarm raster | From:SeekIC

The circuit consists of two parts, the emitter and receiver. The former consists of the computing amplifier 01, the capacitor C3 can be rectified to 1kHz, the potentiometer Rpz regulates the width of the pulse ultra-sonic wave, the potentiometer Rp1 limits the emitting current in a certain range. The input terminal of the receiver is the LDR or the optical transistor. The pulse light is converted into the AC current, the computing amplifier 0II is controlled by the FET T1, and its output controls the amplifier 0III. To allow it to receive signals in bad or remote environments, the signal from the 0III needs to by magnified by T2 and T3.



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