Sensor Definition and 403 Threads

I'm an old digital guy working on a little analog oscillator project so I'm a bit in over my head. The objective is to detect alloy deviations in samples of aluminum scrap: a very simple go/no-go detector I've cobbled together an inductive meter design using a dual op-amp sine wave...

Here's the circuit- It isn't clear to me which part of this circuit makes the voltage divider and also it doesn't show where the voltage output is on the circuit. Can someone tell me those two things please. Also I don't understand why voltage increases as resistance increases in the LDR...

Hello, I'm looking for a distance sensor for range of 100 meters (neutral surface). The sensor should be small (15cm^3). Do you have any recommendations? thanks Nir

Hi, I'd like to know how it's possible to calculate the altitude of a satellite using some kind sensor. I know that near-space(28~30km) you can still read a very low pressure so I can calculate the altitude using pressure. But and after this? I read that you can use gravity so, can I use...

http://farm7.static.flickr.com/6125/6203213456_7daabe9662.jpg" This is my first post and I've never been here so I'm not sure this is where i should post my question, but if I'm wrong, pls correct me. This force sensor is to load my truck ontop of that shaft to determine it's drag force...

Hi, I have a microphone sensor and when i am reading that datasheet, they have written it in as SENSITIVITY -12mV/Pa. I am not sure, what does it mean. Can someone clear me?

Hey... I want to consider my research work on DFB laser as Sensor applicstions. I need to write a Research proposal on this topics. DFB Laser/DFB Fiber Laser as sensor for Hydrophone, Accelerometer, Seismic operation, Aerodynamics sensor, Flow control, Humidity Control, Temperature control...

I'm looking for a barometric pressure sensor to use as an altimeter in my project. I've narrowed it down to these three: http://www.mouser.com/Search/ProductDetail.aspx?R=MPX2102ASXvirtualkey55700000virtualkey841-MPX2102ASX...

I am reading a vibration sensor manuvall that always written in units of "g". what is the meaning of that g. Can some explain me. The document is down here.

I have searched on web but i did not get exact explanation on about these topics. Could someone clear me. I am looking for accelemeter to my pump that can get the information about vibrations.

I am using LG Optimus 2x smartphone(Gyroscope and Accelerometer sensor) for positioning. I want to get correct rotation angles from gyroscope that can be used later on for body to Earth coordinate transformation. My question is that 1- How I can measure and remove the drift in gyro sensor. The...

I work for a research group at my university. We are considering the use of a hot-film sensor array to characterize flow over our a portion of an airfoil in the wind tunnel. We are looking for something like the http://www.taosystem.com/products/senflex/" sensors offered by Tao Systems. I tried...

I have a water tank, and i want to make a circuit that measures the water height, and display the value on a 3 seven segment display as a percentage of the total height. So am searching for a pressure sensor that i want to put in the tank. Can anyone advise me for a sensor number that i...

Hi, I am looking for a sensor/ detector (A) which could perform the following: constrain: transmitter/ receiver (B) size must be small so that it can be inserted in human bone to be detected later, diameter 3mm X 6mm length is preferred, however, a bigger size can be consider as well...

Can a CMOS sensor be used as a Geiger counter To help the folks in Japan protect themselves from contaminated food and to get some assurance of the safety of their homes, we are putting together a team to evaluate the feasibility of writing an iPhone/Android application that would use the CMOS...

Hello, I am attempting to build a control system including foul line detectors for a bowling alley. I am a Computer Engineering student, and while I am really good at the software side of things am a bit lacking in the hardware side. I was wondering if I could get any help in creating this...

hey guys,i want a level sensor for a tank, a big industrial one, contains pulp for paper industry, i don't want a continuous data stream, just if it's under a certain level, turns on a pump, and if its over another certain level, turns it off, tell me the type of sensor, and the best...

Does anyone know where I can purchase a temperature sensor that can operate at 200K? Thermistors and thermocouples all seem to fail around 223K.

Hi all ! i want to know some of the devices that measure natural frequency of solids/vessels, etc ! with regards! take care !

Homework Statement Here's the question, verbatim; We want to build a pressure using a block of elastic material, where the pressure applied to the top surface is measured by a strain gauge mounted on one of the side walls of the block. The gauge factor of the strain gauge is 2.5. When 1 mm Hg...

Hi everyone, I need to model a crank sensor with a flying wheel in Maxwell. Crank sensor is made of permenant magnet, pole piece (to concentrate the magnetic field), and coil. There is a space between the target wheel and the crank the sensor. What I have to do is to simulate the output...

Hi, I need to get data from some sensors over a ethernet connection. I found that application idea on microchip site: http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2505&param=en535727#P26_1312 How do I build that circuit?

I'm planning to design a PIR motion sensor. I wanted to know if I can use ordinary class-A amplifiers to amplify the output of the sensor which will be given to the alarm circuit. The transistor I'm planning to use is BC-547

sensor data,need to be used by labview, through "usb port" only hi, i have got an assignment. i need to pick up the data from sensor,and then, through dac usng usb port,data has to be used in labview. but,can anyone guide me, regarding usb portocols. devices available in markets, having...

Hi there, I am doing some research online trying to find a good site that explains to me how sensor resolution works. I have a very vague understanding right now and I was hoping someone could go through it with me. I'll give a bit of background as to the task I have. I have a 4 quadrant...

hi this is vebi , i want to design rfid tag antenna with moisture sensor can anybody suggest me how to design

Hi, I have to build a sensor circuit to measure temperatures up to 2000°C. I searched for an IR sensor for this and it seems they are very costly. Is there a way to suppress the incoming IR radiation from the source and direct it to a sensor having lower temperature sensing ranges? I...

Hi everybody! So I'm in this internship where my team and I have to build a motion sensor device for a museum's exhibit. Basically, there are instruments behind glass, and we're going to set up motion sensors around or in front of the set up for viewers to trigger. Once they're triggered...

Hi, wondering how I could combine a simple wet sensor circuit and a dry sensor circuit into one? The type of wet sensor I'm looking at is like this: and the dry sensor is the same except the sensor and variable resistor switch places. How could I combine the two into one, so that the...

Hello, I used to watch a youtube's clip of tracking human motion long ago. I wonder if I do something similar, how "big" is the object sensor I should buy ? I'd like to monitor thefts if any in front of my house, I need details before purchasing any, as I'm afraid I'll be ripped off. Thank you...

Hi, I want to convert the accelerometer values from sensor frame to ENU reference frame , I am using oreintation sensor values, yaw ,pitch ,roll. I want to confirm one thing that After transforming to ENU frame should I get accelertation values with reference to ENU frame like this [0 0 Z]...

Hi all, I have a question about the response of a cmos imaging sensor. The total exposure is defined as the irradiance * pixel area * exposure time and it can be varied by changing either the irradiance or the exposure time. Would the sensor response remain constant if measurements are taken...

Hi, just wondering how I could make a circuit so that it would only work when one water sensor if touching water while the other isn't. Here's a quick http://i539.photobucket.com/albums/ff356/AnneFTW/Random/WaterPump.png" and replace the buzzer with a pump, but how do I use probes with two with...

Can anyone help me convert 12v DC to AC for the purpose of measuring fluid permittivity in real time, automotive application? I'm new to PF and limited experience, so all the help/details you can provide are greatly appreciated.

How to specify a lens to increase angular responsivity of optical sensor? Sensor I presently use has angular responsivity +/-60 degrees at 50% level and I would like to increase it to +/- 80 degrees at 50% level or more. Which lens should I use? Please advice on design guidance for this...

I am terrible with electric. I just need some guidance on reconfiguring a hall sensor to read the opposite input. I have an analog tachometer from the '80s that was used to sense a groove on a grounded, spinning disk. I want to use the probe (which has 3 wires) to sense a raised piece of...

Hi! um, i have a problem with my assignment. (don't worry, I'm not asking for the whole thing to be solved here!). and basically i have to sketch the voltage output of a magneto-resistive sensor when it's placed in Earth's magnetic field and rotated 360 degrees. the horizontal component of...

Hello I recently bought a linear Hall effect sensor for measuring current, but I don't know how to make the circuit to measure the current, could anybody help me with this? Please tell me the circuit. By the way, I use the linear Hall effect sensor CSLA2EL by Honeywell. Thank you very much!

Hello everybody, I have been searching for a linear image sensor CCD or CMOS for emission spectroscopic applications.The length and pixel size should be around 70mm and 8-12um respectively. Will somebody help me in finding this? Another one is It's 'camera card' or data acquisition...

Question Details Ok, so want to get a heart rate sensor, take it apart, and adapt it to make it bluetooth enabled so i can see the heart rate on a phone/computer. Where should I start? What hardware and software should I use? I'm really a beginner and have no idea where to start lol. Also, I...

Hi I need to know the mass flow rate of air passing through a chamber which houses an NDIR sensor, so I can relate that to the quantity of a particular gas passing through. I was just wondering whether using an automobile MAF sensor (hot wire) would be wise. If it could be used, it would be...

hi all, m trying to implement sensor fusion of two three axis accelerometers data.can anyone help me in modelling this sensor and fusing for state estimation using EKF? thanks in advance.!

Proximity sensor devise HELP ! Hi all I'm new on here and this is my first post, I would like to set up a sensor devise where when there isn't a object in the way of the sensor there will be a green light on a panel the other side of a building and when a object moves into the way of the...

Homework Statement I am looking for help and information to calibrate a NDIR CO2 gas sensor for temperature and pressure compensation using the beers law extension coefficients.I have found some limited information through going through the web. This is straight through gas cell made in the...

I'm trying to design a position sensor for a specific application but the last time I thought about physics was a long time ago. The situation is *similar* to this : I have a block of wood with an irregularly shaped tantalum bead (diameter of about 2mm) embedded about 2-4 mm into the wood...

Quantum level working of IR sensor... There are datasheets of IR sensors like the TSOP1738 that conveniently tell me that when I make an IR LED flash at 38Khz, a current is produced. However, i would like to know what happens on an atomic level. Is it just a matter of electron promotion...

I have a two stroke Yamaha motorcycle and I wish to fit a narrow band lambda sensor to the exhaust with the intention of monitoring air/fuel ratios and eventually designing and making a simple closed loop fuel injection system (with some open loop capabilities, until the sensor warms up or at...

Homework Statement Hello guys, This is a practice exam problem and I am getting an answer i feel is definitely not right. Anyways here is the question... You are designing a system to measure the magnetic field generated by an electromagnet. This forms part of a feedback control system to...

Hello All, I am going to be conducting a basic physics experiment where a magnet, which can slide up and down a vertical pole is launched upward using an electromagnet. I am not sure how high this magnet will go yet but I'm expecting a maximum vertical displacement of no more than 6-12...

Homework Statement The quantity of liquid available in its storage tank is often monitored by a capacitive level sensor. This sensor is a vertically aligned cylindrical capacitor with outer and inner conductor radii Ra and Rb, whose length L spans the height of the tank. When a nonconducting...