The sensitivity of the proximity sensor circuit can be adjusted with P1 for the desired “distance”. One of its obvious uses is to open a door automatically. For this the sensor must be placed on the ...

The vibrating proximity ... battery-operated circuit that you can squeeze into a minuscule prototype enclosure. The circuit operates on a single 3.7-V lithium-ion (1S Li-ion) battery for convenience.

Figure2: 3. Integrated Distance Calculation Circuit for Fast and Accurate Sensing Nuvoton's new TOF sensor is equipped with an integrated distance calculation circuit and a signal correction ISP ...

Most proximity sensors ... by a level-detection circuit. When the amplitude of the oscillations exceeds a specific value, the level detector turns on the output of the sensor.