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Questions tagged [sensor]

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

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Impedance measurement using AD 5933

I hope this message finds you well. I am using the AD 5933 evaluation board for impedance measurement, The data sheet says it can measure the impedance up to 10M ohm. I am currently measuring the ...
Kamran Bashir's user avatar
-2 votes
0 answers
29 views

Two Amplifier Circuits using for Reading Temperature Sensor [closed]

Can I read one thermocouple sensor with two bias current/voltage applied amplifier circuits simultaneously? Is there any problem over there?
jacks's user avatar
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Please help me identify this IC - top marking "CEK"?

Please help me identify this IC - top marking "CEK" such as picture below:
HNLinh's user avatar
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Calculate number of parallel magnetic sensors needed for certain accuracy for ground survey 2D maps [closed]

I'd like to calculate the number of magnetic (fluxgate Mag03, Bartington) needed for a certain precision, when arranging them next to each other to survey the ground magnetic field. I'm aware that for ...
user387449's user avatar
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1 answer
62 views

Detection system for specific material

I'm looking for some ideas on how to detect some kind of material/tag that can be electrically distinguished amongst organic material, wood and iron. Such material/tag should be possible to detect ...
Kacper's user avatar
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2 answers
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Connecting Two 24VDC Power Supplies

I have a system that has multiple different gas detection sensors and we are datalogging our readings onto a PLC. To power our sensors we are using a 10 A power supply and have everything grounded ...
Dylan Mc Loughlin's user avatar
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1 answer
47 views

I need a sensor setup to detect if something passes through an opening after I click a button [closed]

I am making a compartment that holds up to 7 different vitamin pills separately. Each of the 7 slots has a small doorway that allows the pills to exit from the slots (after I click the button) and ...
Mohamed Anwer's user avatar
0 votes
1 answer
46 views

Suggest appropriate substitute for cable glands

I have a 3.3 mm cable coming from a sensor (3.3 V) and going to an instrument. I would not like any joints in the path in the form of connectors which could make problems for the sensor if the ...
Iskander's user avatar
1 vote
1 answer
63 views

Modelling an eddy current sensor

An eddy current sensor is modeled as an air core transformer with shorted secondary: simulate this circuit – Schematic created using CircuitLab According to Kirchoff's laws, the total voltages ...
Chaitanya's user avatar
1 vote
0 answers
34 views

Interfacing with 0..-2v Sensor using ADS1115

I'm designing a circuit to interface with a sensor that operates on a ±12VDC power supply and outputs a signal between 0 and -2V. I plan to use an ADS1115 ADC for reading this signal. Circuit Design: ...
MJerjawi's user avatar
7 votes
1 answer
368 views

Design of very long serial signal systems

In the current case there is a single signal conductor, tens (hundreds?) of meters long, which serially connects door and window sensors for a whole building. The sensors are simplest possible ...
NoobPointerException's user avatar
2 votes
4 answers
107 views

Opamp dual package IC configuration

I have a question regarding the configuration of opamps for sensor signal amplification. I have a circuit with two sensors going through identical signal conditioning circuits (amplification and ...
enrico's user avatar
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1 answer
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Temperature Sensor Auto

I'm trying to make a temperature sensor for a Golf MK2, with an LM3914N to light an LED bar with 10 LEDs and in the signal I'm using a voltage divider for R2 to be the temperature sensor that operates ...
Joel Pedrosa's user avatar
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29 views

Measurement bias of Hall sensors with moving permanent magnets

I want to measure the magnetic flux density produced by a moving permanent magnet. In my case, the magnet would move left and right alternatively at speed of 10 mm/s, with a constant vertical distance ...
booo's user avatar
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0 answers
37 views

Fingerprint sensor module communication (FPM383 R503)

I'm working on a fingerprint sensor that is known as FPM383. It is much like the well known R503 sensor. Their datasheet and serial communication manual are almost identical. I was trying to control ...
AKTanara's user avatar
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1 vote
2 answers
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Which component is likely raising the temperature measurement on my BME680 sensor board?

I have integrated a BME680 temperature, pressure and humidity sensor on a PCB with NL27WZ17 Schmitt triggers (U3 & U4), a RT9193-33GB LDO regulator (U1) and a CM1224-04SO ESD diode (D2). I also ...
Tommy95's user avatar
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-3 votes
1 answer
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How to connect E 610 piezo amplifier module to the piezo sensor for vibrations? [closed]

I have a piezo amplifier from PI instruments (model: E 610) that has to be connected to a cylindrical vibration sensor(piezo). I do not know how to make it vibrate using the amplifier and a function ...
Anang Katyayan's user avatar
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2 answers
51 views

What is the difference between capacitive liquid level sensor and potentiometer liquid level sensor

I have a sensor I use to determine the level of water in my swimming pool. One person has told me it is a capacitive sensor and another said it works like a potentiometer. I would like to know what ...
user1114881's user avatar
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1 answer
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Closed loop Hall current sensor, is it possible to shift the result from negative output?

I am planning to use this closed loop Hall current sensor. Is it possible to use a unipolar power supply (ie. only +24V, no negative) and shift the result by not connecting RM to ground, but to a ...
yo3hcv's user avatar
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0 answers
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PIR sensor and its working

I have been designing a PIR sensor circuit for occupancy sensor. We have been facing problems like fault detections most of the time when we turn on air conditioning. There is also issues like the ...
Aakas Pulikkal's user avatar
0 votes
1 answer
33 views

Can I Wire a Thermocouple Like a PT100 Sensor

I have an IoT multi-channel controller which can accept PT100 sensors (2-wire or 3-wire). I don't have any PT100 sensors, however I do have K-type thermocouple wire. Is there any way to wire in the ...
Kendric Rendle-Short's user avatar
1 vote
2 answers
51 views

IR pulse sensor : signal stops after a few pulses

I'm trying to make a pulse sensor based on this tutorial: https://makezine.com/projects/ir-pulse-sensor/. I therefore reproduced this diagram by replacing the LM354s with MCP6002s and without ...
Sumnayono's user avatar
1 vote
0 answers
47 views

PIR Circuit Problem

I am using D203B model of PIR and I used the circuit that was suggested on its datasheet (first pic). I do not know what the problem is, as the output (pin the 8 and 14) of op-amp (LM324)is always on (...
Saeed's user avatar
  • 21
2 votes
1 answer
48 views

Methods For Reducing Output Voltage Of Pressure Sensor Into ADC

I am developing a data acquisition system that takes pressure readings from a pressure sensor. The pressure sensor is a bridge sensor which feeds into a differential ADC. The ADC has an input range of ...
Vera Fodor's user avatar
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Wiring of buttons in solenoid and PIR sensor

Folks, have been working on the project and I'd appreciate any help with checking if everything wired correctly and if there's anything needs to be added or is redundant. Project is straightforward: ...
Okini's user avatar
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3 votes
3 answers
945 views

Why is a Schmitt trigger useful for SPI?

I understand Schmitt triggers are a great way to convert a floating or noisy signal to either HIGH or LOW depending on a threshold. It is mentioned in other threads that a Schmitt trigger can help ...
Tommy95's user avatar
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1 vote
0 answers
47 views

Car side-mirror dimmer simulator circuit - DIY

Would like to make a simple car side-mirror simulator circuit. The side mirrors I installed (for better blind spot) do not have a dimmer circuit and I am getting LIN bus errors since the dimmer wires ...
fe7565's user avatar
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0 votes
1 answer
77 views

What could the strange noise in the images be due to? They appear to be composed of 8x8 squares, and many of them contain different patterns [closed]

The question may seem silly, but I am curious about the structure of images from a certain biomedical image dataset. If you enlarge the following image fragments, you can see that they consist of 8x8 ...
forest-spells's user avatar
0 votes
1 answer
38 views

Proximity sensor (3 Wire NPN or PNP) to RS-232

I do have 2 proximity sensors (level sensors) with 3 wire design. They offer to be PNP or NPN and I need to implement them into an RS-232. They are supplied by 24 VDC. Is there somewhat like a ...
Kinetik1703's user avatar
0 votes
1 answer
34 views

How to switch between 2 power levels for mq7 sensor

I am using mq7 sensor for my project.For this sensor according to the datasheet I need to continuously switch between 5 and 1.5 V input voltage to mq7 sensor. Since I am a beginner, wanted to know how ...
Yukta Sanghvi's user avatar
3 votes
6 answers
916 views

How can I create 4-20 mA current souce

I have one op amp based circuit that converts 4-20 mA from current sensor into 5-9 V DC. Right now I don't have any such sensor to test this circuit. I want to create new circuit that produce 4-20 mA ...
Bhushan Waghe's user avatar
2 votes
4 answers
915 views

PT1000 drifts more than 100°C

I'm using a PT1000 and MAX31865 to measure the temperature inside a machine. Electronics (MAX31865 and MCU) are inside an isolated box. The PT1000 is outside and connected in two wire configuration (...
Felix Kunz's user avatar
0 votes
3 answers
43 views

Use digital sensor with USB to serial TTL converter?

I have a sensor (HC2A-S3A), which provides analog and digital output signals. The digital interface is UART (19200 baud, protocol RoASCII). Can I use a USB to Serial TTL Converter (chipset: FTDI ...
Pontis's user avatar
  • 101
2 votes
2 answers
83 views

Simulate hall voltage as a function of temperature in LTspice

I'm trying to simulate how temperature affects voltage sensitivity in my hall sensor from LTspice. How do I make use of this equation to get my correct output? Any feedback will help, thank you. I ...
Arl's user avatar
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0 votes
1 answer
43 views

Is there a way to use multiple Ldr inside a darkness sensor?

im trying to make a darkness sensor with mulpiple LDRs, the idea is that if all the LDRs are in the dark, a light in a led strip is turn on, otherwise, the led strip stays off. I have manage to make ...
rey kittan's user avatar
0 votes
2 answers
43 views

A sensor's idle voltage is 1.1 V, and its triggered output voltage is 5 V. How can I condition the signal to be <0.2 V idle and ~2.5 V triggered?

I'm triggering a high speed camera with an analog chronometer tower that when un-triggered puts out 1.1 V. When an object passes through the tower, it briefly spikes to 5 V. I'm using an old camera ...
Jake Nixon's user avatar
0 votes
1 answer
34 views

Tie to VDDIO for I²C Interface

I want to communicate to a sensor that supports I2C and SPI. I want to use I2C and the datasheet says "Tie CS to VDDIO for I²C Interface", do I need to connect a resistor to limit the ...
PeterM's user avatar
  • 3
0 votes
0 answers
39 views

Flame Sensor Supply Voltage Range

I have this flame sensor module which I am going to use for a project. Upon closer inspection, I can see that the maximum supply voltage of the LM393 comparator IC used is 30V according to this ...
Kailash Kumaravel's user avatar
0 votes
1 answer
56 views

Pinout and details for the ME4-H2 hydrogen sensor from Winsen

I have been trying to understand and use a hydrogen sensor from Winsen (ME4-H2). However, the datasheet is scarce in information about the pinouts and other details. The pins are called C, R, W and an ...
Akash Hegde's user avatar
0 votes
3 answers
124 views

MAX6675 SPI communication with PIC microcontroller

I'm using a PIC16F1832X to communicate with a MAX6675 thermocouple-to-digital converter. As I read the values of the temperature and the SSPBUF register, they are way too high; SSPBUF is 223. I assume ...
wqeeekendwrrar's user avatar
0 votes
1 answer
34 views

Sleep mode of SGP40 sensor

I'm trying to develop a system which has a feature to monitor air quality using a SGP40. I want this board to be in sleep mode most of the time and only wake up if the sensor detects alarming ...
404's user avatar
  • 15
1 vote
1 answer
135 views

How to introduce a PIR motion sensor and/or timer into my circuit?

I created a product demo box that completes a circuit once the "push to start" button is pressed. Closing the circuit allows the customer to see my product in action while holding down a ...
Charles's user avatar
  • 41
0 votes
1 answer
89 views

How to Decode Quaternion Data from LSM6DSV16X IMU Sensor FIFO?

I'm working with the LSM6DSV16X IMU sensor, which comes with a Sensor Fusion Low-Power (SFLP) algorithm providing a 6-axis game rotation vector (quaternion) stored directly in the FIFO. The datasheet ...
Lister Remmir's user avatar
0 votes
1 answer
71 views

What's the right approach to measure sensor output?

We have observed some unexpected data measurement fluctuations in our meter output. We would like to find out where exactly the fluctuations come from. There is a pressure sensor connects to our ADC (...
neuron mac's user avatar
0 votes
1 answer
38 views

PIR sensor and the fault detection related to it

Well I am Working on a PIR occupancy sensor project and the issue is, it is having false detection on occasions like when an air conditioner or a fan is turned on, well I can't figure what to do?
Aakas Pulikkal's user avatar
0 votes
0 answers
53 views

SLF3S-4000B not recognised by Arduino Uno R3

I have a Sensirion SLF3S-4000B connected to SDA/SCL lines of the Arduino uno through a logic level shifter (connected like in this example: https://learn.sparkfun.com/tutorials/retired---using-the-...
CadeO01's user avatar
1 vote
1 answer
103 views

Is this a good circuit for connecting a piezo disc sensor to a microcontroller?

I'm making a musical instrument, where you pluck "teeth" which have piezo disc sensors attached to them, and I want to get the output of the piezo into a microcontroller so I can interpret ...
Jeff Kaufman's user avatar
1 vote
1 answer
74 views

Raspberry Pi Pico, ensuring the circuit diagram is correct

First of all, thank you so much for your interest in my question. Introduction The following is a schematic diagram I drew up to represent my Raspberry Pi Pico WH - LED lamp project. I am controlling ...
Anjana Silva's user avatar
0 votes
2 answers
49 views

Liquid Nitrogen Sensor LED Circuit Troubleshooting

I am working on a project that is intended to be an alarm system for when liquid nitrogen levels get too low. I have a sensor (The LS2 liquid nitrogen sensor from Teragon) which has included ...
iheidman's user avatar
0 votes
1 answer
144 views

How to solder wire on Piezo Disc?

I am working on a project that has this piezo sensor. How I can connect wire to it?
Monesh Rathod's user avatar

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