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.

learn more… | top users | synonyms

0
votes
1answer
30 views

Circuit with 2 reed switches (proximity sensors) output to single GPIO

I would like to use 2 magnetic proximity sensors (normally open reed switches) to determine the position of a chicken door (vertical sliding door) which in turn controls a motor. If the door comes ...
0
votes
2answers
31 views

Design options for tracking relative orientation of two elements

Background: I need a system of two discrete elements where one of the elements can continually track the distance and direction to the other, and their respective orientations. The specific ...
0
votes
1answer
36 views

Precise Tracking of Coordinates across small 2d plane Wirelessly [duplicate]

First off, I'd like to say my background is definitely more in the realm of software than hardware so I might be a bit of a beginner about certain things.. That being said, I have this idea that ...
2
votes
2answers
109 views

How build coil for respiratory magnetometer or find a better option (hall effect)?

I am trying to build an respiratory magnetometer. This device is no longer widely used even thought it was well liked. The reason it is no longer used is due to the fact that the coils used in it were ...
0
votes
0answers
41 views

Track a ball on the field of play in real-time

Is there a way to track the 3D location of a ball (roughly 8cm in diameter) on the field of play (roughly 100m x 100m) in real-time? The ball will be moving at top velocities of around 20m/s. I'm ...
0
votes
2answers
109 views

Increasing the range of an IR based detector

I am working on a IR based object detector. I understand the basics of how it functions, i.e., 38kHz pulse through an IR LED and read the output pin of the IR sensor. The problem is that the range ...
0
votes
1answer
41 views

Kiosk proximity sensor

I am designing an information kiosk with touch screen to display information in a museum. I would like to provide it with a proximity sensor so that the dormant screen would come on whenever a visitor ...
0
votes
2answers
81 views

Is there a sensor capable of measuring distance?

I'm looking for a simple way to measure the distance between 2 devices, basically 1 device will be placed in each leg and one of them will measure the leg stride, at any moment, by calculating the ...
0
votes
1answer
76 views

Switching between transmit and receive in a transceiver

My current project involves building a proximity sensor that uses RF and is low-cost (so no microcontrollers). I've come across two circuits that look quite promising, a transmitter and a receiver. I ...
113
votes
6answers
10k views

Designing a Santa alarm (honestly)

You read the title and that's what I am trying to do. Synopsis: I have a young son who is determined to catch Santa (to what ends I don't know). He even dreamed up using some kind of pressure plate ...
2
votes
2answers
73 views

How can I achieve cm accuracy for x,y,z outdoors positioning

How can I achieve cm or less accuracy for x,y,z outdoor positioning contained inside a 100 meter cube (bigger the better but this is minimum). I do not care if I need external beacons/sensors or ...
0
votes
0answers
50 views

Good narrow beam, modulated IR sensor suggestions

I am looking for a narrow beam, modulated, digital IR sensor that can detect a distance of at least 10 cm (longer is better). I've talked to mouser and pololu and they were unable to leave me in the ...
0
votes
0answers
153 views

Bluetooth Low Energy Proximity sensing less than 2 feet?

I am working on a project where I need a TX and RX to be able to sense if the modules are within 2 feet of one another. Ideally, we would like to only utilize BTLE 4.0 for both devices since power ...
0
votes
0answers
43 views

Sensor to detect that the subject is still close

I'm thinking about starting a small Raspberry Pi / Arduino project and I have to use some sensors. I want to detect if a mechanical plastic part on the other side of a wooden panel has moved and if ...
0
votes
1answer
216 views

Reverse iBeacon and Proximity Sensor

I'm looking for a way to track people in rooms. iBeacon track Smartphones. But it requires people to have a smartphone. I'm looking for a reverse beacon ? People wear iBeacon and trigger a kind of ...
0
votes
0answers
29 views

Sensor to detect the co-ordinates of hand without using camera and wearable device

I want to simulate the mouse using hand movements in my project.Thus i am looking for a sensor which can provide me the exact co-ordinates of the hand and i dont want to use the camera and opencv ...
0
votes
1answer
28 views

How can we increase the range of a line sensor to make it work as a proximity sensor?

Basically, I have this line sensor. It is designed to distinguish black and white lines. It detects white surface and gives me digital 1 as output and 0 in case of black. But the surface need to be ...
-1
votes
1answer
120 views

Small low-power device-to-device proximity detector

I would like to find or create a small low-power proximity detector to tell a device when another device is near. This would be coupled to a small microcontroller like the AT-tiny 45. It doesn't ...
0
votes
1answer
39 views

How to test/connect the CAP-150 capacitive sensor

I am evaluating a few sensors for an application at work, and I'm having some troubles figuring out the correct way to connect/test this sensor: Gems Sensors' CAP-150. Datasheet here. I want to ...
0
votes
5answers
277 views

Can a proximity sensor read through fabric?

I am trying to build an arduino project with the following requirements: Proximity sensors detect human presence and its distance The sensors are hidden behind fabric Range has to be 1-3 meters or ...
4
votes
2answers
73 views

Choice of sensor for detecting touch (on/off)

I would like to detect a user's touch on a shop window (at a specific area, there would be a 'call to action' marking on the window, i.e. 'touch here') Any sensor to detect this must be contained ...
1
vote
0answers
75 views

Can I use a capacitive sensor to detect a person proximity without touch?

I only see uses of capacitive sensor to detect touch. But I wonder if I can calibrate a capacitive sensor to detect if a person is close enough, even if the person is not touching it. I intend to use ...
2
votes
2answers
618 views

Sensor to detect toilet occupancy?

I'm thinking of hacking up something simple to check toilet occupancy in an office. Ideally, the system should be unobtrusive and out of the way. I know you can use a PIR sensor to track moving ...
0
votes
2answers
72 views

Microchip proximity detection system

Is there any type of proximity system that detects a microchip or similar? I am looking at an "mobile" proximity detection system that I could specifically detect an implanted or imbedded microchip ...
3
votes
3answers
277 views

RGB & Proximity Sensor at about 6 feet

New to this site so hoping it's the right place to ask. I'm trying to prototype something for use in a retail store and an idea a teammate had was using an RGB sensor to detect both ambient color as ...
1
vote
2answers
240 views

Poor man's IR obstacle sensor make sense(improve) from signal under daylight

I'm talking about this kind of sensor: Question and then long description: can I do something to improve their blindness in front of window? At least for detection of object in front of the robot, ...
0
votes
1answer
721 views

Build simple wireless door (open/close) sensor with Arduino or Attiny84/87

I have a spare Arduino uno, a few Attiny84 and a few Attiny87. In my Raspberry PI I have installed a RFM12Pi and have a spare RFM12b to use with Arduino. Last piece I have in the drawer is a sonic ...
4
votes
5answers
489 views

Object detection using sensors and then reporting the location

I am trying to prototype a sensor + location reporting chip that will do the following: Sense if a object is present over the top of it (a vehicle to be specific) Reporting the location of the chip ...
0
votes
2answers
251 views

IR proximity sensor

I have built an IR proximity sensor using a normal 940nm IR LED, Tsop 4856 kHz IR photodiode. I have used 555 timer to generate pulses to the IR led. the circuit is working correctly as far as I know. ...
-3
votes
3answers
136 views

Looking for a simple way of knowing when the door is open [closed]

First off all im a beginner with electricity. I'd like to know at all times when the door is open (5 meters away) at all times, and have it displayed with an LED. What kind of sensor I'd need and how ...
0
votes
0answers
88 views

VCNL4020-based hand motion detection

I am working on gesture control board that aims to detect motion direction of hand, e.g. from left to right or right to left. For detecting direction, I decided to use a proximity sensor, VCNL4020 ...
1
vote
3answers
319 views

IR proximity sensor for automatic spraying

I am a beginner in field of circuits, so excuse me for my amateur questions. Let me explain my task: I have to build a low cost proximity sensor for a sense and spray device. I have read various ...
2
votes
0answers
160 views

Helicopter rotor blade system detection approaching objects

I am working on this project to detect anything that is entering the zone of RC helicopter blades (around 10cm diameter) region and stop the rotor. It needs to detect any solid object so metal or ...
2
votes
1answer
104 views

Best technology to have a specific person's proximity in a room turn on a light outside the room

I need help deciding which technology to use so that, when a specific person (1 out of 6) walks into a room, their specific ID is recognized and the corresponding colored light is illuminated outside ...
1
vote
1answer
57 views

Sensor to track book open or not [closed]

For my project, I need to develop a gadget to track if a given book is open or not. Can any one help me what kind of sensor I need to use and the full configuration manual of that sensor. I tried, ...
1
vote
1answer
58 views

Certain proximity detctor

I have a project... Including cats. We have 3 cats, two teenagers and one old man, named Oliver. We want Oliver to be able to eat whenever he wants, but we don't want the other cats to eat whenever ...
2
votes
2answers
326 views

Ultrasonic Sensor Controller

I am working on a project at school where we need sonar input to control a little vehicle. Pretty simple stuff, usually. However, we're having a bear of a time getting the sonar to work. My faculty ...
3
votes
1answer
118 views

Circuit Board Design Help (Novice) [closed]

I would like to see if the project that I am currently working on is something that can be done. Any help I can get would be much appreciated. I hope I am providing enough information. I am looking ...
2
votes
2answers
126 views

Sensoring gokart pedals?

I want to make a ATMega-based module to record several parameters of a go-kart while driving - pedals position, speed of the wheels and g-forces. I have a problem with choosing how to measure gas and ...
0
votes
1answer
243 views

cny70 with 40106 and PIC, only detects 1 time every time I reset

I am using a PIC18F2550, a CNY70 and a 40106. (Schematics below) The problem is that when I turn on the circuit, the first time the CNY70 detects something works perfectly (I have 1 led in every B ...
0
votes
3answers
3k views

How to connect a Inductive Proximity Sensor Switch NPN DC6-36V to PIC18F4550 5V

I have got a LJ12A3-4-Z/BX Inductive Proximity Sensor Switch NPN DC6-36V with this Specifications: Model: LJ12A3-4-Z/BX Theory: Inductive Type Sensor Wire Type: Cylindrical DC 3 Wire Type ...
0
votes
1answer
218 views

RF proximity sensor around a perimeter

I'm trying to build a proximity sensor that triggers on nearness of the sensor to a perimeter antenna, sort of like an underground invisible fence. I want to feed that input into a microcontroller ...
2
votes
1answer
3k views

What can I do to increase passive HF RFID read range?

I am working on a prototype, one function of which is to detect whether an object is "in range" by a few cm. Right now I'm just using an Arduino and a cheap Mifare RC-522 kit that operates at 13.56 ...
1
vote
1answer
194 views

Looking for a 3.3V IR sensor [closed]

I am currently using a SHARP GP2YOA21 infrared distance measuring sensor which is 5.0V. I am looking for an alternative IR sensor that would work with 3.3V. Our application involves wireless sensor ...
0
votes
1answer
46 views

Robot follow person [duplicate]

I want to make a wagon that follows a person. I have considered GPS with a differential but I don't think the resolution (10 meters at best) is adequate. IR would be confused by reflections an ...
2
votes
1answer
379 views

How to collimate ultrasonc beam from proximity sensor HC-SR04 in measurng distances of 3 meters?

I am currently doing a project for bicycle overtaking safety in which an approaching vehicle or cycle from behind is found through ultrasonic sensor and indication is given to the rider. I had a ...
1
vote
0answers
134 views

Detecting very simple movements (a hand waving) usable on 8bits microcontroller

Recently i saw a video about Nest Protect, an smart smoke detector, that can be operated by waving your hand under it. Since there is no visible holes on the lower part i suppose they are not using ...
0
votes
1answer
83 views

Recommended Sensor / Type of the sensors to be used

For example, I have a board (A plain board or a board with sensors, this needs to be decided depending on sensors ). On this board, I will place small objects. These small objects are having 2 sides ...
0
votes
2answers
1k views

Improve 3D printing via distance detection

3D Printers are now "auto-leveling" via a limit switch contacting the surface that is swung into place prior to printing and height of the bed is checked in 3 places. Software then continually ...
2
votes
2answers
456 views

Arduino Uno and Sonar Sensor - how long can the wire be before performance suffers?

I am setting up an Arduino Uno with a sonar sensor from Maxbotix (http://www.maxbotix.com/Ultrasonic_Sensors/MB7360.htm). The sensor will be powered directly from the Arduino (5V). The sensor needs ...