Proximity Switch Tester Circuit

Simple metal detector circuit a simple metal detector can be designed using proximity sensor buzzer and lc circuit inductor connected in parallel with capacitor which are connected as shown in the above.

Proximity switch tester circuit.

Testers for proximity and photoelectric switches verify the signal output type of dc switches a red light indicates npn and a green light indicates pnp. Allows for fast field checks troubleshooting and or demonstration of 10 30 v dc sensors with a maximum sensor current draw of 100 ma. Sensitivity is adjustable with p1 which will be located at a great distance from the rest of the presence detector circuit. The proximity sensor circuit can be used for different applications a few proximity sensor circuit applications are described below.

This circuit is immune to sunlight or any other ambient light and will not get affected until the tuned reflected signals is received by the sensor. The circuit explained below could be configured to activate a relay or any suitable load such as a water tap as soon as human body or hand comes near the capacitive sensor plate with specific conditions the hand proximity is only enough to trigger the circuit output. Proximity switch consists a sensor circuit and a driver circuit. Pocket sized sensor tester with push type terminals makes wire connections quick and easy.

For technical drawings and 3 d models click on a part number. The transistor based driver circuit may use npn or pnp transistors and it. A very simple proximity detector. You can make very useful applications like a burglar alarm a visitor counter a proximity based switching application etc.

It is the size of a transistor operates over the 4 16 volt range and can detect objects about 4 9 inches away by. Gadget freaks model railroaders roboticists or cat hosts will love the versatility of the sharp is471 infrared proximity detector. The following post explains an accurate infrared ir based proximity detector circuit which incorporates the ic lm567 for ensuring reliable and foolproof operations. This circuit does not detect object movement but can act as an proximity sensor.

The sensor circuit sends an output high signal to the transistor based driver circuit when any object found near to the sensor circuit. The sensor circuit purpose is used to detect any near by objects. In this project let s learn how to make a simple proximity detector or sensor circuit using minimal components.