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Questions tagged [sensor]

Sensors convert a physical quantity (e.g. temperature, pressure) into an electrical signal.

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Amplifying milli Volts to Volts

I am currently using a KE-25 oxygen sensor which is galvano microcell type oxygen sensor which doesn't require a power supply to sense oxygen level in the environment. Depending on the concentration ...
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0answers
24 views

How to use STM32F446 and Lidar-V3? [on hold]

I try to receive data from a Lidar-V3 sensor, however I am new in the subject and I do not know where to start, I have looked for existing libraries for the nucelo card and I have not found (i found ...
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1answer
23 views

Problem with Vout of Honeywell ASDX Analog pressure sensor

Few months ago I decide to bought an absolute pressure measure system using a Honeywell ASDX differential analog pressure sensor (Model: ASDX ACX 030PAAA5). The datasheet of this type of sensor ...
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41 views

Fuel level sensor

I want to continuously monitor the fuel level in this HONDA GX35 tank, as shown below. Can anyone suggest me an appropriate sensor for this ? P.S. : The tank is very small of 0.65L capacity. :(
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41 views

Detector Project [on hold]

I am currently doing my project to detect completeness of stuff. So I am going to place a microswitch below any of the object to send signal. The problem is how can I know the missing stuff is A ...
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0answers
30 views

Accurate localization of a remote vehicle

I've been working on a project where I'm supposed to design a vehicle that carries antennas to perform SAR (Synthetic-aperture radar) imaging. This vehicle has 3 wheels which 2 of them steered by a DC ...
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48 views

Looking for data sheet of the following Modbus Sensors #updated

I'm a noob in this area, please ignore any stupidity and lack of info and any help is appreciated and I'm ready to provide all clarification on the post if by chance any info is missing. So i have ...
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0answers
55 views

Noise immunity of single ended analog voltage signal

I want to use a sensor with analog output in my design. The output of the sensor is a low frequency traingular wave (less than 300 Hz) and voltage vetween 0 - 5V. I need to carry the sensor signal to ...
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2answers
88 views

How can I sense a signal on a 12v automotive wire non invasively?

I'm working on a project where I need to sense if a circuit is in operation on a wide range of vehicles. My plan so far is a current sensing clamp, and an Arduino micro listening for the current draw ...
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2answers
43 views

Not getting acknowledgement from MPU 9250 I2C slave using STM32F401RE

I am using an STM32F401RE development board to communicate over I2C to an MPU9250 based breakout board sensor. So far I have set the start condition, and sent the slave address/write bit to the device,...
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3answers
130 views

Detect drones passing through hula-hops

I host some drone races at times and I make gates with hula-hops. I fit some led stripes in there and they glow nicely. We ONLY run micro drones, F36, tinny whoop and those. And mostly indoors (...
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1answer
59 views

AD620 instrumentation amplifier with Wheatstone Bridge-based KMZ10B sensor

I would like to ask for help regarding a certain phenomenon related to amplification by the Analog Devices AD620 instrumentation amplifier (device home page, device datasheet). Vcc is 5V. The AD620 ...
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1answer
53 views

How to measure the battery aging parameters of a 12V flooded automotive lead acid battery? [on hold]

the battery on which I want to perform the experiment is used in hyundaii10 petrol car. I have done some paper study but being a complete novice(unfortunately I am not from electrical stream ) in this ...
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1answer
100 views

Why dust sensor is throwing different values on change of usb cable? [closed]

I have a dust sensor(particulate matter sensor) from Honeywell and which is connected to Vin(5v) of ESP32 dev board. The problem I am facing is sensor throwing ...
1
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1answer
54 views

What are the advantages of 6 wires LVDT over 5 wires LVDT?

What are the advantages of 6 wires LVDT over 5 wires LVDT? Both are the same in that they could be measured using ratiometric calculation. In case of 5 wires LVDT, it is superior in number of wires ...
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1answer
56 views

Non-inverting op amps with sensors [closed]

I would like to know if there's a negative implication of using non-inverting op amps with sensors, for example a pressure sensor? Would it be a better option to use an inverter, and if it is, why?
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1answer
59 views

How to build a multi LED blink circuit triggered by vibration sensor?

I'm wondering how to build a module just like the ones that are in kids shoes that light up. I've taken a few of these out and would like to make my own circuit but I'm not sure if it is possible. I'...
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0answers
8 views

How to fix a speed sensor signal problem? [migrated]

TL;DR - My transmission computer says its output shaft speed sensor reads 0, what is wrong? I am trying to troubleshoot a problem I am having with the speed sensor on an older automatic transmission, ...
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1answer
63 views

What is RSS Error?

I was reading through documentation for an INA219 sensor from TI (http://www.ti.com/product/INA219), and they have a chart for RSS Error. What does RSS stand for?
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2answers
854 views

Having trouble in GPIO output, 220 V to 5 V signal

I'm not an electric guy, I'm just trying to build a small circuit to sense 220 V with my Microcontroller (RPi). But I'm getting either 5 V or 1.3 V on a GPIO wire. I can't understand the problem. I ...
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2answers
59 views

Are transmitters always required for industrial sensors (4mA-20mA)?

I am designing a device that takes in various types of industrial sensors. Initially, I had a transmitter to take the PWM signal and convert it to 4mA-20mA. After reading lots of articles about the ...
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2answers
125 views

Detecting very small magnetic movements

I am looking for techniques and methods to detect very small linear magnetic movement caused by a bar magnet. Imagine a bar magnet that can produce yaw and pitch but with extremely low frequency and ...
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0answers
20 views

How to Measure Switch State with Current Sensor

I have a motor attached to a relay board with an INA 219 between the board and motor. I would like to engage the relay and turn on the motor, and then flip the motor off when the switch changes state....
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1answer
76 views

What kind of filtering does this op-amp perform?

I am using a heart rate sensor whose schematic is provided here. The circuit uses an operational amplifier (towards the right of the figure) which among other things, does a filtering operation. I ...
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1answer
39 views

divisor x2 for three hall sensor

I would like to increase the performance of a brushless motor by dividing the frequency of the three hall sensors that detect the speed. is it possible to have a scheme to perform?
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0answers
52 views

Is there an opensource equivalent to Phidgets?

For those who don't know, Phidgets are a hardware platform for interacting between PCs and hardware; they're a sort of "industrial lego". They have DIO, relay drivers, sensors etc. Their key utility ...
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1answer
724 views

Identify this component with a weight inside a cylinder

This component was pulled from a device that was used to detect movement. When I first saw this part, I thought it was an electrolytic capacitor, but upon closer inspection, I found that if I shake ...
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2answers
79 views

Temperature sensors for low temperature

I want to find a temperature sensor able to be used from -80 °C to 20 °C, measuring air temperature, with a potentially low pressure, reaching 1 kPa. Another constraint is that it should be as small ...
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1answer
60 views

Find a sinusoid in a sensor data

I am collecting raw data from a radar sensor using source code from the manufacturing company to allow me to plot data. I am looking for a repetitive movement that would be considered sinusoidal. ...
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2answers
32 views

Measuring floating gate potential with minimal leakage current

I am working on a sensing device where the voltage of a floating node is dependent on the quantity to be sensed, as well as the net charge stored in the node. I would like the device to be only ...
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1answer
29 views

Is a buffer required for this gas flow sensor to ADC connection?

I'm designing part of an application that will consist of an Omron D6F-P0010A1 MEMS flow sensor. The analog output of the sensor will be connected to a TI ADS1114 ADC. I'm trying to figure out from ...
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2answers
71 views

Which is the most accurate temperature sensor in the market? [closed]

I have been working on a project requiring very accurate and precise measurements of temperature, of the order of +-0.1 degrees Celcius (or the closest to this), I have been using a LM-35 and as ...
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1answer
79 views

Activating a circuit based on change of resistance

I am looking to use a sensor, such as photoresistor, to activate a circuit only when there is a significant change in the input. Such as when the light incident on the photoresistor changes ...
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1answer
39 views

SPI interface, ESP 07 connect to MCP 3008

I'm trying to connect an MCP3008 to an ESP07 through the SPI interface. (A bidirectional level 5V - 3.3V is used in between but it doesn't matter) However this is not working because: The CS pin is ...
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1answer
21 views

Help identifying proper connection of pressure transducer?

I am using a US381-0000005-100PA pressure transducer. The datasheet. The '8' indicates its the 5-20 mA current loop type. The transducer has four wires - red, white, green, and black, but the diagram ...
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1answer
51 views

Sensor to detect vehicle occupants from external viewpoint?

Trying to solve for a project of mine. Thermal imaging (long wave infrared) sensors cannot pass through the metal skin/structure of a car, glass windows seem too reflective as well. I'm trying to find ...
4
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2answers
1k views

How to connect an industrial 24V sensor to a 3.3V input Raspberry Pi pin?

Background I want to read how efficient an industrial manufacturing line is without tampering with the PLC code. The simplest solution I can think of is using a Raspberry Pi, thus creating an ...
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1answer
32 views

Confused with figuring out this piezoelectric sensor

I have this impulse-hammer with this specific model data-sheet. It has output through BNC and if I hook it up to a scope or a daq board, I see nothing but some 50Hz noise when the hammer is hit. ...
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2answers
57 views

BLDC sensors placement

I am having some trouble in reversing the direction of a sensored 10KW BLDC motor. Motor has 36 stator teeth and 40 magnets (20 pole pairs) Apparently the hall sensors position is set for CW ...
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2answers
87 views

How to do IMU and camera “sensor fusion” tracking?

I have some 50ms latency cameras on hand and an gyro+accelerometer+magnetometer 800Hz IMU. I would like to know how exactly I should do a sensor fusion of such an IMU and camera to fix the positional ...
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1answer
21 views

Detect if 3-phase 110VAC motor is running via 24VDC PLC input

We have an industrial machine with 3-phase ~250W AC (~2.5A @ 110V) motors on it. I want to non-invasively detect if the motors are running. That detection signal needs to feed into the 24V input of ...
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0answers
27 views

Capacitive proximity detector

I’d like to rig up a primitive alarm to the rear doors of my 4x4, to dissuade thieves from breaking into it when it is being shipped between countries. A basic capacitive sensor is what I think I ...
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1answer
16 views

Connecting the FSR sensor with the plunger rod as to transfer the full force

I am using FSR sensor for force measurement, I am using rod plunger to transfer force to the other side of the rod which is connected to the FSR sensor. The force is not going to the active area of ...
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1answer
37 views

Can Mq4 sensor be used for smoke detection?

I wanted to ask if Mq4 can be used for fire smoke detection? I read it have small sensitivity to smoke in the data sheet, but I wanted to know what is the least value in ppm for it to detect smoke ? ...
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1answer
61 views

Turning off external sensors with Arduino: MOSFET vs I/O pin

For a project, I made an environmental sensor system, consisting of an Arduino Pro Mini 5V (with ATmega328P microcontroller), a data logger module and three sensors. To save power between data logs I ...
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1answer
64 views

Mq4 sensor doesnt detect natural gas but detects cigarette lighter gas only! [closed]

I am working on a project for detecting natural gas of cooking stoves, I have tested several sensors but the mq4 sensor was the one that worked fine. Now after about one month of using the sensor i ...
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2answers
76 views

High accuracy angle sensor

What's an appropriate sensor for cheaply and accurately measuring an angle of rotation? I'm trying to measure the angle of a joint in a robotic limb using a small potentiometer mounted at the axis of ...
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2answers
53 views

How do we measure capacitance by change in vibration

A capacitively based MEMS affinity glucose sensor. link to the IEEE paper, from where I've got this doubt. The gold electrodes are separated with some distance and the permalloy is vibrating with ...
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1answer
47 views

Tuning a potential sensor using a source-follower MOSFET

I am interested in building a simple but sensitive setup that would allow me to detect small potential changes (adsorption of ions) on the surface of the gate of a MOSFET - what is commonly referred ...