All items tagged with ultrasonic and alarm (4)

1-12-2014 | Small, widely available and dirt-cheap ultrasonic sensors enable us to design both simple and lavish measuring devices for all kinds of rang...

10-03-2014 | This project achieves a measuring instrument with the following functions:

1-02-1986 | EE 62 February 1986 CAR BURGLAR ALARM Although no alarm offers complete protection against theft, it will, none the less, deter most thieves...

1-07-1978 | Most ultrasonic transducers can be operated at input levels up to 50 ... 80 V peak-to-peak. This usually means employing an ultra-sonic osci...