Questions tagged [range-detector]

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104 views

Detecting both short and open circuit voice coils in coil driver

I'm building a voice coil driver for a science experiment. The coils are in an environment where both coil shorts and coil open circuits are common problems. I'd like to build in a fault indicator to ...
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1answer
368 views

IR LED Detectable Range

As a part of a project at work I need to detect an IR LED of my choice (I was thinking about 1~3 W , 730 to 950 nm) from a distance of ~100 m with a camera sensor (was looking at IDS UI-3160CP-M-GL) ...
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2answers
847 views

How does the Infineon REAL3™ depth sensing imager chips measure time of flight for each pixel?

tl;dr: How do the REAL3™ depth-sensing imager chips measure time of flight of light for each pixel? Is it quadrature, time-to-amplitude, or something else? The Infineon REAL3™ depth sensing imagers ...
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1answer
35 views

Parallax LRF image viewer connection timed out

I am using USB to R232 Serial interface to communicate with the parallax LRF through LRF IMage Viewer software. I have installed the drivers for RS232 and have also performed the loop back test. But ...
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3answers
478 views

increasing range of photo-diode detector with little voltage

These are the two circuits I made. The one on the left is the transmitter and the one on the right is a receiver. R4 is set to 180 ohms, R3 is set to 220 ohms, R1 is set to 9.4M and R2 is set to 4.7M. ...
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2answers
324 views

What sensor do I need to measure distance from the side along a straight line?

In a few days I will start to build a hand railing for my stairs out of bamboo with a built in LED strip. I want to be able to indicate the position of a person standing on the staircase by ...
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1answer
73 views

How do I know if the serial cable is plugged in the right way?

I recently got a LeddarTech Leddar One rangefinder, which has a UART serial connector. I'm used to boards denoting the pinout directly next to the pins, but the only distinguishing mark on this board'...
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1answer
78 views

Are light based Time Of Flight and Phase distance measurement schemes different?

It is assumed the Time Of Flight (TOF) approach uses short pulses of light and short sampling windows. While the Phase approach modulates the light such that the phase of the received light is ...
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2answers
923 views

Accurately measuring distance using ultrasonic rangefinder

I need to measure the distance to an unknown object, which can be made out of any material. The solution should be low-cost, so I assumed using a HC-SR04 sensor would be a good choice. Would an ...
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1answer
90 views

How to decide on sonar signal?

I was wondering which waveform suits the best for ultrasound sensing. For instance, if I am going to detect distances to the objects, does it matter if I send sawtooth, square wave or pure sine wave? ...
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1answer
62 views

How does speaker's power output affect sonar's detection limit and it's resolution?

I am planning to make a sonar application using smart-phone speaker and microphone, and it is given that speaker's power output is 3 watts and sound frequency is 20 kHz. I wanted to understand how ...
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1answer
348 views

Battery powered, wearable, non line of sight, short range metal detector?

I want to build a circuit to detect when people bring their hands close to their mouth. This could be used to warn chronic nail biters of impending nail biting for example :) The idea I have is that ...
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1answer
138 views

Problem of detecting very close objects by SRF05 Ultrasonic sensor

I'm using SRF05 for distance measurement, but the major problem is that this module will not differ a very close object and no object. So its impossible to say ...
2
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1answer
82 views

How do i make sure that PCB traces or Enclosure unit is not affecting the BLE 4.0 range?

I am using BLE 4.1 ready module having on chip antenna, according to datasheet i have taken care in PCB layout design that at least there should be 8 mm of distance from Antenna and copper traces from ...
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1answer
44 views

Effect of increasing Detector Range in Power Usage

I have two separate systems. System 1 can measure well biochemical events in the frequency [1,180] Hz. System 2 is designed to measure low frequency electromechanical processes in the frequency [0....
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0answers
90 views

Detecting the distance of my dog to the food bowl

When one of my dogs sneaks to another dog's food bowl, I want to be notified so I can stop it. I have EZ430-RF2500 (msp430) development kit. Is it suitable for such project? I also have Arduino so I ...
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1answer
50 views

Object tracking using mobile devices [closed]

We are creating a product that we would like to place a microchip into so that it can be easily found using an iPhone or android device. The product we are creating is about the size of a small watch....
2
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1answer
106 views

Best Sensor for tracking motion

Here is the scenario: The sensor is pointed at a black lightly padded wall. And the sensor is secured to an object that oscillates toward and away from the wall. What is the best sensor to use to keep ...
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1answer
175 views

Check if Voltage is in a certain range

I did not really found anything on google to accomplish my idea, so try here to find out an answer: My task is defined as follows: I need to check if the input voltage is in a specific range. Lets ...
6
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2answers
345 views

Ultrasound in air ranging system design

I'm designing an air ultrasound range finder that bounces ultrasound signals off a person's head to measure the distance of the device from the head. The goal is to get ~1mm accuracy as a device is ...
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1answer
1k 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 ...
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1answer
395 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 ...
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2answers
228 views

Detect multiple corn bags through wood with a sensor

I'm working on a project for school, and wondering what options I have for detecting the corn bags through a piece of wood. More specifically, we are creating an automated cornhole scorer. Sources ...
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2answers
514 views

Ultrasonic Frequency to distance

In another post I ask about an ultrasonic radial beacon finder: Does it exist: 360 degree ultrasonic receiver/beacon combo Assuming it exists or I can hack one of those together, would it be possible ...
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2answers
643 views

How do IR rangefinders accomplish centimeter precision without high speed / high cost parts?

I'm currently working on a system that requires an RF rangefinder with ~15 cm precision, over a range of about 50 meters. My research into the field has shown that I'll need complex and expensive ...
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1answer
1k views

Waterproof sonar?

I'm building sensors for an underwater robot and was wondering if it's possible to waterproof ultrasonic range finders like this one to work underwater. I have made waterproof enclosures before. ...
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2answers
3k views

Point-to-point range measurement using an IR receiver

I am interested in using an IR receiver (as opposed to a standalone PIN photodiode or phototransistor) to measure distance/range. I thought I had found an appropriate match in Vishay's TSSP4P38 mid-...
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2answers
1k views

Accurately detecting metallic objects

I need to detect the presence of large metallic objects. The detector will be on the ground. The detectable object will be around 60-70cm away. The detector will ...
8
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2answers
3k views

Collimating a sonar beam

Wondering if anyone is aware of a way to cause an ultrasonic proximity sensor to be modded, such that, it's forward line-of-sight range remains unaffected, but it's angular spread is reduced, somewhat ...
3
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1answer
904 views

Ultrasonic range finder with single transducer

I would like to make an ultrasonic range finder with a single transducer. The reason for only one transducer is because I'm limited in the amount of space I have for what I'm sensing. I've purchased ...
5
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2answers
981 views

Ultrasonic sensor doesn't work inside case

I have a very strange error. My ultrasonic sensor, when both speakers are sticking out of my case, doesn't work at all. It's a black case. It gives very "near" readings. But it does work when outside. ...
8
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2answers
25k views

rangefinder (very long range), ultrasonic or laser… for arduino?

I have a maxbotics Ez1 plugged to an arduino but i was wondering how to build a digital tape measure and to connect it to an arduino, for measuraments longer than 10 feet, maybe 20, 30 feet or more......
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1answer
337 views

Infrared ranging

I've been taking a look at these swarm robots and am very impressed. There is, however, one aspect of the robots I'm confused about, which is the infrared ranging they use. The robots have a wide ...
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2answers
493 views

Where to put stabilising capacitor?

Following on from this question. Can I place the capacitor anywhere in the circuit before the IR Distance Sensor? In my project I have 2 PCBs: A power circuit and a Processing Circuit. In the Diagram ...
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4answers
15k views

Can't get consistent readings from Sharp IR range detector

I'm in the very early stages of trying to build a robot that wanders around and builds up a map of its environment. I'm using an Arduino and I currently have a Sharp 2Y0A21 IR range detector sat on ...
5
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3answers
7k views

Best way of making a trip-wire type device?

I'm wanting to make a type of electronic "trip wire". My basic idea is to have like a laser and basically when the laser is interrupted then it sends some signal to a microprocessor. I'm not tied ...