Questions tagged [proximity-sensor]

A proximity sensor detects the presence of another object without physical contact. There are many different kinds, examples include capacitive, inductive and others using various wavelengths including ultrasonic, visible and non-visible light and RF.

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86 views

Why don't commercial metal detectors clearly distinguish between iron and other metals?

I've read about how metal detectors work, and what I learnt here on EE.SE and other articles, the main principle is that ferrous metal will increase the inductance of the search coil, while non ...
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37 views

How can I connect a 24v-powered inductive proximity sensor to a 3D printer control board?

I am attempting to connect an inductive proximity sensor to my 3D printer. The sensor I'm using is a Zhongde PL-08N2 sensor, which is an NPN output NC (Normally Closed) sensor. As I understand it, ...
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2answers
63 views

VL53L1X Time of flight sensor field of view implications

VL53L1X is a Time of Flight sensor, it measures distance via pulsed laser or so I understand. But upon reading its specs it has a field of view of max 27 degrees which is quite confusing for me. I ...
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115 views

I2C Bus getting Locked UP on Single Master - Single Slave System

I was trying to develop a I2C driver function for reading data from a proximity sensor(Cypress CY8CMBR3102) and initially the function worked very well and successfully. But while continuously reading ...
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35 views

Acoustic “round trip” switch/shifting times for “time of flight”

Consider the following scenario (see figure below): At beginning, time 0 (t0) is recorded, [A] (left) produces an acoustic signal, detected by [B] (right). If the signal can be discriminated from ...
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66 views

Distance between 2 objects (up to 75 cm), independent of angle [closed]

Which sensor type or measurement principle (magnetic, ultrasound, time of flight...) would best fit the following requirements (i.e. worth trying first)? I am asking because while reading I got ...
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53 views

Reading high voltage output NPN proximity sensor with Ardunio YUN

I have a NPN proximity sensor with rating voltage 6-36 VDC. (https://www.amazon.co.uk/gp/product/B07SD9VYDH/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1) To power it up, I use a 24 VDC power ...
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183 views

Two different ultrasonic range finders to minimize interference

Basically, I am building a robot that needs to be able to detect the distance from multiple sides. My plan is to use multiple ultrasonic range finders on each side, but I'm worried about interference ...
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188 views

Help with reverse engineering a small PCB

I need to reverse engineer this small board (7.5 x 28 mm) which serves an inductive proximity sensor. I suspect some of the components are dated/obsolete but the board works well. Ideally I would end ...
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1answer
110 views

Sharp IR Distance Sensor gives the wrong readings

I am using the SHARP GP2Y0A21YK0F IR distance sensor. According to the datasheet, the output voltage to distance graph should look as follows: I attached the sensor to a power source straight from ...
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1answer
74 views

Mixing two fluids dynamically using valves and sensors [closed]

I'm new to the field of electrical and electronics design... trying to build a hobby project for home decoration. I want to mix two colored fluids with proportion of each liquid decided by a user ...
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283 views

Interface NodeMCU with RCWL-0516 Microwave Radar Sensor and power via battery [closed]

I am trying to interface NodeMCU with RCWL-0516 Microwave Radar Sensor and power it via battery. Below is the circuit diagram Below is the Arduino Code I am using : ...
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86 views

Has someone tried to keep a CD at a further distance from the CD-pickup-reader?

So, I basically want to know the range of the IR light that comes from a CD reader/writer (KSS-213C). I used an IR sensor(IR Photodiode) to detect the light that comes from the pickup reader, but ...
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152 views

Inductive Proximity Sensor Proteus Simulation

Do you know how can I simulate in Proteus a similar component to the Inductive Proximity Sensor? I don't find it on the default libraries Is it recommended to simulate every single component?
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30 views

Can one use a conventional microphone as an underground acoustic sensor? [duplicate]

I need an acoustic sensor I can bury to monitor the immediate area acoustically for footsteps. Is it possible to simply bury a microphone and call it a day, or would a more specialized underground ...
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2answers
35 views

18m diffuse PNP photoelectric sensor and arduino

I need some confirmation on how to connect an 18m PNP diffuse photoelectric sensor to an Arduino. I am power the unit via an external 12 volt power supply. The ground between the power supply and ...
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88 views

Pulses counting problem from npn proximity with interrupts in arduino

I am interfacing an open output npn proximity sensor with Arduino nano. I have used very silly approach of voltage divider as I was not sure that in open output sensor you can get whatever voltage you ...
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1answer
35 views

How to avoid lag of servo motor used with distance sensor in FRDM-KL25Z

I am having trouble with using distance sensor and servo motor at the same time. My project is a radar project. I have a servo motor sweeping around and on top of it I have distance sensor. When I ...
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0answers
41 views

Max count error Touch Key STM32

I am struggling with an STM32l053C8T6 microcontroller and testing touch/proximity in regard of size and shape of the electrodes. I am using a Discovery 32L053C8 board. It has implemented support of ...
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1answer
44 views

Determining sensor bandwidth

I'm currently working on a project making use of ultrasonic proximity sensors. Unfortunately it seems as though well-documented ones are very few and far between (when compared to PIC or MOSFET ...
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2answers
77 views

Measuring accuracy and counting frequency?

The machines at my workshop have meter counters with hall effect sensor switches, which convert shaft rotation to electronic pulses. The switching signal is send to their PLCs' high speed counter ...
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1answer
70 views

Questions about capacitive sensing

I'm trying to use the FDC1004 capacitance-to-digital and I have a few questions: Why do we (our fingers or another part of our body) act as the other conductive plate - don't we have a very large ...
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1answer
25 views

Common output from two proximity sensors

I need help wherein I'm using proximity sensors to trigger an event in a device. The device looks for 12V from the sensors and registers it as an event trigger. There's no problem when I'm using one ...
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1answer
51 views

Inducitve Proximity Sensor - Safety Gate Latch Codes?

If I am using an inductive proximity sensors as a safety gate latch, what codes and standards do I need to abide by? Some safety sensors I research have: - Category 3 (EN ISO 13849) - Safety ...
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1answer
38 views

2-way mini motion sensor (mirror switch)?

So a mirror switch will switch ON with 1st "swipe" and OFF on 2nd "swipe". I want to set it up in a 2-way configuration whereby if you pass switch 1 it's ON and then pass switch 2 it's OFF, then pass ...
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2answers
73 views

Restrict IR sensor field of view

I'm trying to develop a device that can detect or "watch" an infrared beacon that is freely moving side-to-side anywhere within a 180° field of view (-90° to +90°, with center/forward at 0°); i.e. the ...
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60 views

Can the same IR sensor be used to measure distance and temperature?

I am trying to find a distance sensor (for obstacle avoidance) that works in really high temperature zones (~600 degree C). I also need a temperature sensor for avoiding my robot to move in certain ...
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42 views

Capacitive proximity sensing - pcb pad

Does capacitance of pcb's copper used in conjunction with capacitance proximity sensor (analog) rises or lowers when the obstacle get closer?
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79 views

How can I make my RFID reader restrict itself to the tag in the closest proximity and read only this tag?

I'm looking for a way to detect the user closest to a certain object that has the RFID reader attached to it. Therefore I need my RFID reader to restrict itself to the user closest to it and not read ...
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1answer
57 views

Reliable sensing method for device inside a parcel to detect when/if the parcel is opened?

I'm wracking my brain for reliable ways for an electronic device to detect when/if the parcel it is sealed inside is opened. The device will be sealed inside the package and activated via Bluetooth ...
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1answer
86 views

Google Pixel XL; Anyone know what this middle piece is called and what it does? [closed]

Does anyone know what this middle piece is called in the Google Pixel XL? Here is the image (I've underlined in blue): I noticed that it emits infrared light. I think its a proximity sensor but I ...
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1answer
255 views

Schmitt Trigger: Problems between theory and reality

I want to say that I am not a native English speaker so you may find some writing errors. Also, I am just learning electronics, so sorry if some questions are poorly formulated. I am trying to build ...
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73 views

Need a sensor for detecting the presence of someone like a door sensor we have in lifts/elevators

Door sensors used in elevators/lifts are very expensive and my budget is not that much. But I need a similar mechanism or solution to detect the presence of someone if he/she is standing in the given ...
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1answer
127 views

How to measure the angle of a rope on a moving airplane?

I've got a simple rc plane which I want to fly on a tether. The tether is attached to the bottom of the plane like this: I now want to know what the orientation of the rope on the bottom of the plane ...
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1answer
580 views

Practicality of using flat-spiral coil as electromagnet?

For my project, I'm using a 3D magnetic sensor to track the proximity of a local electromagnet at any time, no more than a finger length away. Ideally, I would like the the electromagnet to be: ...
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1answer
75 views

40 kHz Emitter Frequency Response

I've recently purchased 40 kHz transceivers and I tested its frequency response in anechoic chamber using a B&K microphone located 90cm away from the emitter. The response provided in the ...
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1answer
75 views

The wavelength region of the IR sensor

I was reading an article that explains the Infrared sensor until I came to the wavelength region's section, which has been mentioned as the following: The infrared waves typically have wavelengths ...
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1answer
2k views

Interfacing of Proximity Sensor with Arduino [closed]

I want to interface OMRON Proximity Sensor E2A-M12KN08-WP-C1 2M with Arduino Uno. How do I interface it with the Arduino? Also, where will I find the relevant starter code? I am new to this and I ...
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242 views

Does an NPN Capacitive proximity sensor exist?

With proxy sensors you generally have 2 types, the NPN and PNP type sensor. I also realized that you have inductive and capacitive proxy sensors... My problem is that I've come to understand PNP to ...
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5answers
2k views

Infrared LED and Photodiodes

I am currently working on a project that uses an IR LED and a photodiode in a proximity sensor configuration (shown below). My question is, I have read some sites that state that your human body ...
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2answers
794 views

How to wire latching SPDT relay using proximity switches without relay hanging

I have a hydraulic-driven piston pump that I designed and built. I need a way for the pump to automaticlly go up and down. I wired it using a SPDT relay and a 3 wire PNP NC (normally closed) and ...
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3answers
319 views

Can I connect Inductive Proximity sensor to two different PLC

Some background, I have a tractor that I want to make semi-autonomous. The tractor has it own PLC and an NPN Proximity sensor to measure speed. I have industrial PLC by Unitronics (V130) with I/O ...
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63 views

Suggestions for a thin contact sensor to check if there is contact between two surfaces

I am doing a little experiment with my bagpack, making it into a smart bag by adding a contact sensor to pockets such that is any item is inserted the contact between surfaces break and vice versa. I ...
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1answer
69 views

Convert continuous signal of HC-SR501 PIR sensor to a single pulse

HC-SR501 PIR sensor sends a continuous signal of 0-3.3V for the period of 4-8 seconds (depending upon the delay set). Is there a way/IC I can convert this signal to a single pulse of 1 sec, preferably ...
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4answers
326 views

Very Long Range Beam Break Trigger Sensor

I am having trouble locating solutions for a long range trigger sensor. Want to detect an approaching vehicle 300 feet or more down the road from a pole mounted device. My first thought was a laser or ...
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2answers
80 views

Inductive proximity sensor and target design

I am thinking of using the LDC1612 by TI to sense position over a 0 to 10mm range with an accuracy better than 100nm. I have been told this is possible by a TI engineer. However, my question concerns ...
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69 views

Proximity tracking using RFID

I would like to build a proximity tracking system. A a central unit small enough to fit on a key chain or necklace that would be able to detect as soon as a tagged object is farther away than a dozen ...
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1answer
332 views

Increase Measurement Distance of a Capacitive Proximity Sensor - Arduino Project

So I am working on a project that I found online at (https://makezine.com/projects/a-touchless-3d-tracking-interface/). However, instead of using my hand to track, I want to track an aluminum ball ...
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1answer
76 views

Sensor for tyre direcction

I am new to driving and get difficulty in knowing Tyre direction if they straight, or turned left or right, I think a sensor connected to my smartphone probably will do the trick of telling me ...
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1answer
51 views

Two-wire switch sensor

I've been researching how to design a circuit for a two-wire switching sensor. It can be operated as a PNP or NPN switch. I need to design a circuit to detect whether the sensor is switched or not. ...

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