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 working principle of this cheap and easy to build metal detector circuit consists in mixing two equal frequencies ... is amplified. If the sensor coil L1 is closer to a metal object then it will ...

Electronic enthusiasts may be interested in a new open source infrared sensor which has been created to support both Raspberry Pi and Arduino powered projects. The IR Detector proximity sensor has ...

Most proximity ... measured 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.

In quick review, an inductive sensor generates an electromagnetic wave at a specific tuned frequency. The tuned circuit ... that their detection area extends well through the metal face of the ...