Car reversing anti-collision alarm circuit diagram composed of LM1812

Published:2011/9/16 1:10:00 Author:Rebekka | Keyword: car reversing anti-collision alarm | From:SeekIC

LM1812 is an excellent universal ultrasonic integrated device which can send and also receive the ultrasound. The chip includes: Pulse modulation type C oscillator, high-gain receiver, pulse modulation detector and noise suppressors detector system. It can be used for remote control, alarm, automatic door control and communications and can also be used for industrialmaterial or liquidlevel's measurement and control, range and thickness measurement, etc. It is widely applied in rain gear. LM1812 Pin shape LM1812 internal block diagram LMl812 has the following characteristics: a. You can use a send / receive transducer to work. You can also use two transducers to send and receive ultrasound respectively. b. Devices is interchangeable. c. It is used without an external heat sink. e. There is protection circuit inside the device. f. Detector output can drive 1A peak current. g. The range in the water is more than 30m. It is more than 6m in the air. h. Transmit power is up to 12w (peak). The following table shows the limit of LMl812 ultrasonic dedicated circuit operating parameters. Extreme operating parameters LM1812 Ultrasonic devices work dedicated schematic 。 Car reversing anti-collision alarm circuit composed of LM1812. The control distance is adjusted by the 5kΩ potentiometer and it can be controlled within 2 - 3m.



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