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Questions tagged [sensor]

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

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2answers
35 views

What technologies are used to fabricate gas sensors?

Different types of gas sensors exist. Sensors that work with light or resistance sensors. In general, what technologies are used to build sensors?
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3answers
103 views

Rain Drop Detector

The Problem: I tend to open my bedroom windows so that the natural breeze can pass. This is great for cooling but not great when rain falls. If rain falls heavy enough, even if it falls for 1 minute ...
0
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1answer
36 views

How to correct/adjust floor temperature sensor resistance to account for calibration error?

I have a heating system with 10kohm floor temperature sensor cable connected to controller unit. The controller displays floor temperature around 7.0 degC higher than reality, the sensor is installed ...
3
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3answers
201 views

Using Arduino sensors with an STM32

I want to start an electronic project, and found that an ARM based MCU, like STM32F103C, fits my needs more than AVR like Arduino Uno (mostly because of CPU and RAM.) I was wondering if I can use ...
0
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1answer
19 views

MB85RC256V for data logger sensor project?

Please. I need somebody can tell me if I can replace a SD card module of arduino to use instead a MB85RC256V fram module 32KB. I want to save power of 3.7 battery, but I am not sure if I can use a ...
0
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0answers
21 views

Building an optical mouse with stm32 µC and pmw3389 Sensor [on hold]

Currently in the Process of trying to build my own USB HID mouse I bought a STM32F103C8T6, the bluepill. In addition I got an PMW3389, which I got from a partly broken mouse. However the tracking on ...
0
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1answer
47 views

BQ2002 NiMH Charging Circuit not working

I have the following charging circuit based on the BQ2002 which will charge a NiMH battery using a 5V micro USB cable. I built the circuit already and noticed that the TIP32C is not getting hot and ...
0
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0answers
78 views

Do sensors, in general, follow a subscriber model or do they just spit out data at intervals? [closed]

I'm currently implementing a software system where I have to decide between: Create the system so that all parts that have data constantly spit it out. Create the system so that the parts that have ...
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0answers
39 views

NE556 timer dark sensor with turn off delay?

I am starting a project for myself. A night light which turns on when no light falls onto the LDR sensor, and turns off after 1 or 2 seconds when light falls back onto it. I must incorporate the NE556 ...
2
votes
3answers
163 views

Which is the most recommended sensor for sensing humans inside a rail passenger car? [closed]

I am thinking of an application which is necessary to know if there is and where someone is located, inside a rail passenger car or bus, for example, the problem there is many external factors such as ...
0
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0answers
27 views

Placing piezo disk in vibration sensor

I am designing a vibration sensor in enclosure to be placed on vertical surfaces, like windows, doors, etc. My first try was with ready made sw420 module, but looks like it is to sensitive for my ...
1
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0answers
29 views

Can I amplify a thermocouple Signal with the GS8332-SR OP-Amp?

Theremocouples have a very small voltage of around 0.4mV/10C. K Type Thermocouple Voltage Table I want to amplify that signal so I can read it with an ADC on my Arduino Microcontroller. The Voltage ...
0
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2answers
76 views

PCB problem - INA321 vias are too big

I am making a PCB using ULTIBOARD from NI. The problem is that I use a part called INA321 and for some reason I get the error that my vias are too close to each other when I place vias in the pads ...
0
votes
1answer
40 views

Are the results for Proteus simulation and hardware testing for same purpose using different controllers comparable?

I have used Proteus design suite for simulating sensors (such as temperature sensor) interfaced to LPC2138. The sensors which were not available in the software, for them I have modelled them as ...
0
votes
1answer
28 views

Signal conditioning for 2SMPP-03 Pressure sensor

I am wanting to develop a circuit that accurately measures 15 Omron 2SMPP-03 sensors within its full range of -50KPA to 50KPA. Could someone give me a head start or refer me to some information on how ...
0
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1answer
35 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 ...
2
votes
2answers
105 views

5V to 3V3 - Sensor for Arduino 3V3

I am trying to make a circuit using a 3V3 Arduino and other modules working on 3V3, but I have a problem with an analog water sensor I need to use. The output is a voltage range is from 0.5V to 4.5V. ...
0
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3answers
64 views

Fastest temperature sensor for a bimetallic strip

What is the best approach or sensor to analyze the temperature of a bimetallic strip? From experimental data, the temperature swings due to a current flowing into the bimetal, are up to 80°C in a ...
0
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0answers
49 views

Connect industrial distance sensor to raspberry pi

I have this industrial sensor that I want to connect to the raspberry pi 3 model b+. Datasheet of the sensor is here. Given below is the connection diagram of the sensor: I need to connect the ...
1
vote
1answer
52 views

Soil Moisture Sensor Design

I am working on the development of a low-cost capacitive soil moisture sensor which uses dielectric permittivity changes to estimate moisture. I want to use FDC2214 for Cap to Digital Conversation. ...
2
votes
1answer
34 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 ...
0
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2answers
94 views

Reading a high rate (400 kHz) analog input with an ESP32 (or Arduino)

Tried Googling this but I'm not really sure what vocabulary to use. I have a series of light sensors that will be detecting changes at the speed of 400 kHz (or 2.5 µs). I would like to use an ESP32 ...
0
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0answers
44 views

3-Wires PT100 simple circuit design

I'm new to using PT100 sensors and to electronics in General (my knowledge in electronics starts and stops with Arduino). However I'd like to design a simple PT100 (3-wires) sensor circuit. I found a ...
0
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2answers
49 views

Sensor 3.3 V to 5 V pull up schematic

I am designing a circuit for a PCB that will incorporate an ultra-sound sensor (HCSR04.) The sensor needs 5V for supply and its input pin also requires 5 V. The MCU that I am using has pins that ...
1
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0answers
44 views

Should a piezoelectric sensor be modeled as a voltage or current source?

I know that one can do source transformation between current and voltage source. But take a DC power supply, and we usually model it as a voltage source because the voltage is constant even the load ...
2
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3answers
133 views

Potentiostat Drift

Firstly - First post so let me know if I have done anything wrong. Okay, so I am tying to get this biased potentiostat to work. I have attached the circuit below. I am using the following sensor: ...
0
votes
1answer
62 views

Read data from strain-gauge Labjack, Arduino

I am working on a project where we have to record breathing data. For that we ordered a LabJack U3-LV along a with an amplifier (datasheet) and a belt which is some kind of strain gauge I think. We ...
1
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2answers
57 views

Communication via I2C sensor via CAN bus

I am wondering if it is possible to implement the following idea: I want to build a network of sensors, all of them communicate via I2C protocol and all those sensors will send their parameters via ...
1
vote
3answers
79 views

SPI and I2C connections by using mosfet (high side, low side)

I need to design sensors card in altium for sensors connected I2C and SPI. When I searched modules on internet, while some used mosfet to handle high and low side others did not use mosfets. I could ...
1
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2answers
113 views

What is the name of this component

I am a graduate Aerospace Engineering student. I need to wire a pneumatic actuator's controller and a magnetic position sensor for a small part of my research. I received a connection diagram from the ...
0
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3answers
61 views

LM35 max input current - I have a wrong output from the sensor [closed]

I’m currently doing a small project. I’m trying to make my first pcb. That’s for a light I made. But the LM35DZ outputs a wrong voltage. My LM35 puts out 4.6V instead of 380mV. With a 12V - 2A ...
0
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2answers
68 views

Accelerometer Sensor Output Impedance

I am looking into purchasing a TE 810M1 Accelerometer and had a question regarding the resistor's value for amplifying the sensors output. Here is a photo of the sensors electrical properties: The ...
0
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3answers
82 views

What kind of sensor that can detect prolonged contact?

i'm currently working on project that needs an implementation of certain touch/force-presence sensor on human body surface. I want to place the sensor on my backpack shoulder straps, so that the ...
0
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0answers
22 views

Can the scanning speed of an electronic rolling shutter CMOS sensor be controlled?

I'm not certain I'm asking this correctly as I don't entirely understand how such a camera sensor works, so help me out with a couple of areas please! I want to program something that makes use of ...
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1answer
61 views

Schematics for CJMCU-30 SGP30 sensor board

Does anyone have a schematic or detailed specification for the CJMCU-30 SGP30 Gas Sensor (TVOC/eCO2, triangle format) board? I simply cannot find any for it, not even the information about interface ...
0
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0answers
21 views

RCWL-0516 Microwave Radar Sensor

I have recently been interacting with these cheap radar modules from China and works fine specifically the RCWL-0516 Microwave Radar Sensor. Now I wanted to integrate the entire circuit into a custom ...
0
votes
1answer
34 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 ...
0
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2answers
38 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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2answers
101 views

What is the best liquid level sensor [closed]

I need a sensor for measuring level of liquid in a tank. The method of measuring should be non contact type. Please give any suggestion. I want to interface the sensor with a microcontroller like ...
0
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0answers
29 views

Can't import my .sof file to my FPGA

i am new to the whole VHDL/FPGA thing, and i am trying to import a simple AND gate to my FPGA, but i get the failed message everytime, any idea how to fix it? P.S : For some reason the device it ...
-1
votes
2answers
72 views

LM35 sensor giving weird readings [closed]

I am a mechanical engineering student and I'm quite bad at electronics so I decided to post here. For my dissertation, I require 2 circuits using the same 5.7 V DC power supply. One of the circuits is ...
0
votes
0answers
66 views

Photodiode to detect light

For a university purpose I am preparing a project, actually I am thinking of using a photodiode in reverse bias in order to measure intensity of light. I divided this project in some phases: 1) ...
0
votes
1answer
324 views

using a vibration / noise sensor as edge finder in a CNC machine

I have a desktop CNC machine which has just the basic functionalities like controlling the speeds and position with a somewhat reasonable accuracy / precision. I also have an edge finder which I can ...
0
votes
1answer
42 views

Using LEDs in series with optocoupler for biosensor

Long time lurker, first time asker. I've been working through a biosensor schematic from a BME class to build an EKG (I'm a physician, aware of risks of these devices etc) (typical voltages being ...
0
votes
1answer
41 views

Quadrature Incremental Encoder A&B phase

It’s been two days that I’m searching to understand how an incremental encoder’s precision is quadratured. I found out that we must be counting the state changes of the two channels A and B, where ...
2
votes
1answer
61 views

RS485 full duplex to Adapter with A and B ports

I need to configure a sensor (Thies 3D Sonic Anemometer, Manual: https://www.biral.com/wp-content/uploads/2015/01/4.383x.xx_.xxxUS3D.pdf) via my computer, it has RS485 full duplex and half-duplex ...
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0answers
17 views

Difficulty interpreting normalized output vs FOV plot in ZTP-115M datasheet

I am slightly unsure as to how I should interpret the normalization output vs FOV plot of the ZTP-115M datasheet (page 2) My question is 2-fold: Do IR light sources beyond some FOV angle contribute ...
2
votes
1answer
122 views

Signal noise cancelled by touching the leads

I have a pressure sensor that outputs 0.5V with a +/- 20 mV noise. I am trying to identify the root cause of the noise using an oscilloscope. The noise occurs in waves of twice the mains frequency, ...
0
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3answers
70 views

Ultra-low power sound/audio sensor for LOUD noises

I'm searching for a sound/audio sensor with ultra-low power consumption to detect the presence of a really loud noise (100dB+). The controller runs on battery and there is no option for a different ...
1
vote
2answers
109 views

using pressure sensor with 0-10v output for 0-10bar using arduino but pressure value won't cross 4bar. so is a voltage divider required in this case?

I have a pressure sensor working at 24V dc whose output is analog 0-10V for 0-10bar pressure. I am using this sensor with Arduino Uno. I know that the pressure value will never go beyond 4bar. So do I ...