Sensors convert a physical quantity (e.g. temperature, pressure) into an electrical signal.
0
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4answers
33 views
Cascade Wheatstone bridge sensor to increase sensitivity
This question is applicable to any generic sensor in a Wheatstone Bridge configuration.Let us assume it is the following pressure sensor.
http://www.aztronic.cn/thermistors/ntc/design-support-tool/...
0
votes
0answers
35 views
Is there any color sensor which can focus on a small difference of rgb? [on hold]
I am looking for color sensor to separate between 16 colors. Those color are close to each other. I would like to have a color sensor to detect not the full range of rgb, but a limited range with a ...
2
votes
2answers
40 views
What pH sensor have a long-term use with non-calibrated?
I have a project that use some water monitoring sensors (pH, oxygen, conductivity...). But my project are facing a problem:
My device can not be touch within 3 months. And as my knowledge, those ...
-2
votes
0answers
18 views
How can i find Accelerometer Sensor in PROTEUS?
I'm trying to simulate a project called automatic bike turning indicator where i need an accelerometer sensor. But I can't find it in PROTEUS Simulation Software version 7.0 .Can anyone plz help me ...
0
votes
3answers
78 views
Schmitt Trigger not reaching full saturation
I'm trying to develop a sensor based on the optoelectronic device CNY70. I want to filter the signal in order to be read by a microprocessor, where the threshold to change between logic levels could ...
0
votes
1answer
41 views
Led as an input photodiode [Arduino AVR]
I’m trying to use a LED as a light sensor(input) connected to a Arduino Nano.
I connected the led with the Anode at digital pin 8 (PB0) with a resistance of 56 Ohm and the Cathode at an analog pin A0 (...
0
votes
1answer
41 views
Beaglebone Black — Reading multiple HX711 / Load sensors
I have a BBB (Beaglebone black) connected to a few capes.
I need to interface with 4 HX711 boards with loads sensors, I've yet to find anyone who has used any weight sensors with the BB; I've seen ...
1
vote
1answer
29 views
KTY82/220 Temperature sensor terminals
I wanted to use NXP KTY82/220(https://www.nxp.com/docs/en/data-sheet/KTY82_SER.pdf) temperature sensor for my circuit. But I could not see which are the terminals for Vdd, GND and Analog Out in ...
5
votes
2answers
238 views
How can a signal itself have a high impedance?
Observation: Recently I worked with a piezoelectric sensor and read that the sensor itself has a high impedance. Because of this, an op amp of high impedance was required to amplify the signal.
...
1
vote
3answers
59 views
How fast can we measure using IR sensors
Supposing I have an repeatedly object passing through IR sensors and I am looking at the output waveform. What is the maximum frequency the output waveform can have?
I think this maybe related to the ...
2
votes
2answers
814 views
What is this array-like notation of registers in datasheets?
I am reading BMP280 datasheet (pressure&temperature sensor). On different pages they use the following notation:
$$register\text{_}name[a:b]$$ where a, b are integers. For example, on page 13 "...
1
vote
3answers
39 views
Can I connect Inductive Proximity sensor to two different PLC
Some background, I have a tractor that I want to make semi-autonomous.
The tractor has it own PLC and an NPN Proximity sensor to measure speed.
I have industrial PLC by Unitronics (V130) with I/O ...
1
vote
0answers
54 views
Suggestions for a thin contact sensor to check if there is contact between two surfaces
I am doing a little experiment with my bagpack, making it into a smart bag by adding a contact sensor to pockets such that is any item is inserted the contact between surfaces break and vice versa. I ...
0
votes
0answers
25 views
Replacement part, IR detector [closed]
Looking for a replacement part for this old air con unit.
For some reason the old part has rusted or has rust covering it and would only work and Mondays and Thursdays (just kidding).
Any help would ...
0
votes
1answer
21 views
Convert continuous signal of HC-SR501 PIR sensor to a single pulse
HC-SR501 PIR sensor sends a continuous signal of 0-3.3V for the period of 4-8 seconds (depending upon the delay set).
Is there a way/IC I can convert this signal to a single pulse of 1 sec, preferably ...
-1
votes
1answer
75 views
Why does my smartphone level app require calibrating? [closed]
Doing some housework the other day I downloaded an app to my smartphone that included a level for measuring tilt. The app requires me to calibrate the level by first placing my phone on a perfectly ...
0
votes
4answers
148 views
AND Logic on 24 Volt Signals
What kind of chip and/or plug and play device could handle multi-input boolean logic with 24 volt signals?
I have three sets of 20 reed Hall effect, three-wire switches that each output a 24 Volt ...
-1
votes
1answer
89 views
Measure 2d positions and tangents of a blade [on hold]
I would like to measure two points and tangents of a 2d blade and transfer that information to a computer. The blade should be free to be readjusted. Here is a picture of what I would like to measure:
...
0
votes
1answer
88 views
Temperature sensing bee hive
I am a honey bee researcher and I want to build a temperature sensing system to monitor the temperature changes in the three dimensional space within the hive body using 5 sensors on each hive frame (...
-4
votes
0answers
63 views
How to connect specific sensor to specific microcontroller [closed]
The FCC (Flight Control Computer) is our embedded computer which implements an auto-pilot application developed by me.
The FCC is based on the Texas Instruments F28M35H52C1 processor.
The main sensor ...
0
votes
1answer
30 views
thermistor in HC-SR501 PIR
i know the effects of soldering photo-resistor to HC-SR501 PIR module. It then detects movement in the dark only. But can anyone tell me that what is the effect of adding a thermistor to the same PIR ...
0
votes
1answer
23 views
How to find the actual measurement range of a temperature sensor, HTS221?
I am considering to buy the HTS221 Digital Temperature and Humidity Sensor by STMicroelectronics. The datasheet says the operating temperature of the sensor is from -40°C to 120°C. But on page 33 of ...
0
votes
2answers
31 views
fluctuating ADC Reading for 4-20mA Pressure transducer input
I am working on one project of water pressure measurement, in which i used pressure transducer which gives me output between 4-20mA Current form.
I am using one 250 ohm resistance to convert current ...
0
votes
0answers
98 views
Wheel speed sensor signal amplifier
Need some help with this circuit. A similar question was asked and answered a few years ago here Reading an ABS wheel speed sensor
but I need help with clarification.
I have an ABS wheel speed sensor ...
-1
votes
0answers
14 views
TDA0161DP IC for metal detection [duplicate]
How accurate is the TDA0161DP IC for metal detection, for metal and non-metal segregation? What range can it be used to detect metallic objects?
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votes
2answers
55 views
What is the principal of Inductive Conductivity sensor?
What is the principal of Inductive Conductivity sensor which uses two coupled coils to estimate conductivity?
Image Source
I understand that the eddy current losses changes with the conductivity, ...
1
vote
5answers
132 views
I2C monitoring without Microcontroller [closed]
I am trying to read data from an I2C connected touch sensor. Specifically the Azotec IQS266. I plan to preprogram all of the settings the way I want them, and then not touch them again after that. In ...
0
votes
0answers
60 views
Physical impact sensor for detecting mail dropped in letterbox
I would like to attach a sensor to the bottom of my letterbox so that when a parcel or a letter is dropped in it I would receive instant notification. Ideally the sensor would be able to be configured ...
1
vote
1answer
77 views
How does electrical signature devices work when there is more than one load connected?
Now more than ever I see energy monitoring devices like this one that uses "AI" to detect the loads connected to your home electrical network, like the washer or a hairdryer.
These devices use ...
-1
votes
1answer
65 views
Mounting Ultrasonic Sensor on Metal Container to Measure Liquid Level
Is it possible to mount an ultrasonic sensor on the outer metal surface of tank/container to measure the level of the inside liquid ? the gap between the sensor and the metal surface would be 0 mm to ...
0
votes
1answer
68 views
Setting up a grid of IR sensors
I would like to design an nxn IR long range break beam sensors and place them on a table with receiver at one side and transmitter over the other
Length of the table is 155 cm and width is about 140 ...
-2
votes
0answers
22 views
Gas Sensor Simulation [migrated]
I'm looking for a graphical software to simulate a gas sensor mechanism. I thought "comsol multiphysics" could help me to determine the sensing mechanism of semiconductor gas sensor , but I didn't ...
1
vote
2answers
130 views
Can't get low pulse from particulate sensor Shinyei PPD42
I have a Shinyei PPD42 that's connected to my Raspberry Pi B+ using a voltage divider to get the output of the PPD42 to 3.3 V. According to the specification sheet, P1 emits digital output when >1 μm ...
1
vote
1answer
70 views
How to connect one pin to ground when an another analog pin is triggered
I'm trying to combine two working electronics projects into one. I have a standalone piezo sensor that I can read values from when it vibrates via an arduino, and I have a standalone audio board (no ...
1
vote
4answers
105 views
How to distinguish different identical sensors in a CAN bus network?
Knowing about CAN bus protocol, there are parts I couldn't understand entirely. Consider a car, with lots of sensors, say throttle sensor, parking sensor, temperature sensors located at different ...
2
votes
1answer
672 views
What is a biased sensor?
I am working on a 3 Lead amperometric cell in Potentiostat configuration (CE, RE and WE) and I found the word "Biased sensor" and "Bias voltage" all over the datasheet. My question is:
What is a ...
0
votes
0answers
21 views
Myoware sensor gives HIGH analog output signal when connected with 5 servo motors to Arduino Mega board
I am doing my college project where I need to control 5 servo motors by sensing muscle contractions. For this I am using Myoware EMG sensor and an Arduino Mega board.
The problem which I am facing ...
0
votes
0answers
52 views
how to switch off ultrasonic sensor when not in use?
I have ultrasonic sensor which is connected directly to the battery, the sensor take data every 10 mins and the battery is not in use for the rest of 9 mins. I want to switch off the power supply to ...
0
votes
1answer
62 views
Connecting an analog temperature sensor IC to an ADC input of a microcontroller
I am trying to connect an analog temperature sensor LMT84 (http://www.ti.com/product/lmt84) to a micro controller (3.3VDC) using its ADC pin which is 1.4V tolerant (max).
My Vcc is 3.3V, ADC max ...
0
votes
1answer
54 views
Sensors to detect inside liquids temperature and percentage of alcohol
I would like to measure and study the correlation between temperature and percentage of alcohol inside a bin with fermenting beer, what type of sensor do I need.
I was planning to plug this sensors ...
1
vote
0answers
29 views
Trouble with biased measurement for Oxygen Sensor EC410
I need to achieve a -600mV bias between Vsense and Vref for a potentiostat circuit.
I'm trying to replicate the design for an Oxygen Sensor (EC410) by following the above image from the application ...
0
votes
1answer
47 views
Accessing I2C address of ADT7516 ( Temp sensor )
I have a BeagleBone Green and an EVAL board of ADT7516. I connected them by SDA and SCL pins and as they are to be connected with the PC by the usb port, they will have a common ground.
After this ...
0
votes
2answers
40 views
Suggestions on conductive materials for textile capacitive pressure sensors
I am doing preliminary research for my thesis. The thesis involves textile capacitive pressure sensors. I am trying to find out more about how the type of conductive material used affects the ...
22
votes
1answer
3k views
Who said, “all sensors are temperature sensors, but some are better than others”?
One of my favorite electrical quotes goes something like "all sensors are temperature sensors, but some are better than others". Unfortunately, I don't remember where I read this. What is the origin ...
0
votes
2answers
58 views
Decreasing and reading output of a sensor (0 - 10 V) using a voltage divider - Output impedance
I have a pressure sensor giving an output between 0 - 10 V.
I want to read and save the value using an arduino, so I am using a voltage divider (https://learn.sparkfun.com/tutorials/voltage-dividers) ...
0
votes
0answers
59 views
Why could cause abnormal peaks at the start and end of a sound produced by a speaker?
Ok so I was recording sound of different frequencies produced by a speaker and abnormal peaks appeared on the amplitude of the waveform of some of the sounds when I opened the sound recording in ...
0
votes
1answer
47 views
How is this piezoelectric effect converted to voltage?
The data-sheet of this accelerometer says:
This piezoelectric accelerometer may be treated as a charge source.
Its sensitivity is expressed in terms of charge per unit acceleration
(pC/ms–2, pC/...
1
vote
1answer
46 views
Reading values from Force Sensitive Resistor - Arduino
I am trying to read the values from a Force Sensitive Resistor with Arduino. Actually, I am already reading them, but it only works if I use a 10 Ohm or lower resistor and it really heats up. (See ...
1
vote
1answer
35 views
Is there such thing as an EMG sensor which doesn't use electrodes?
In a traditional EMG the user is required to clean the target area with alcohol, then apply some gel, and finally stick on an electrode.
I'm looking for some sensor that can read the same muscle ...
-2
votes
1answer
68 views
Connecting Temperature sensor EVAL board (ADT7516) to the BeagleBone Green [closed]
I have a BeagleBone Green
and an evaluation board of the temp sensor (ADT7516).
I also have a 4-pin female jumper to grove 4 pin conversion cable.
I am not an electronics student and have no idea ...
