Questions tagged [sensor]
Sensors convert a physical quantity (e.g. temperature, pressure) into an electrical signal.
2,783
questions
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6 views
DPS310 Altitude sensor data filtering
I created a 3D cube application to track the height of the Cube using 2 DPS310 Altitude sensors. One sensor is placed on the ground for reference measurement with respect to the ground. Second sensor ...
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0answers
53 views
High resolution compass heading sensing? [closed]
I'm building a simple GOTO telescope mount, and I've built the components for sensing precisely what angle the telescope is pointed at relative to the fixed base without problem. This gives me values ...
0
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0answers
24 views
Capacitive fingerprint sensor model format
I am trying to use one of these Adafruit fingerprint sensors from Cool Components.
Background
To enrol a new fingerprint into its memory, you place your finger on the sensor twice, and each time it ...
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0answers
42 views
Synchronization movement for two objects [closed]
I need to move 2 objects in the same direction with synchronization. To do this I am trying to use sensors, Bluetooth and a linear servo.
2
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1answer
41 views
How to make an accurate strain gauge conditioner
I need to measure tensile strains between 0 and 0.01%, with an accuracy between 1 to 10% within that range.
It seems like all systems that read strain gauges rely on a Wheatstone bridge to amplify ...
1
vote
1answer
81 views
4 pin round connector identification
Does anybody recognize this connector? I’ve scoured the internet, but can’t find any connectors with this type of keyway. It is for a data acquisition system.
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1answer
91 views
Novice looking for help with a current sensor circuit
I'm an electronics novice trying to figure out how to detect when current is flowing to certain tools in my shop so I can add some automation to my dust collection system.
I essentially want to build ...
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0answers
49 views
Small range precise distance sensors [closed]
I am looking for a component that precisely measures deviations in mm. The component will be held at a distance approx 1cm from the area being measured. I am going to connect this device to a computer ...
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0answers
41 views
How can one connect external sensors to an Android device to receive data from the sensors on the phone?
I need to build a device which transmits data from wearable biosensors wirelessly to an Android mobile device.
For example - How can we transmit data from a small ECG device connected to ones chest ...
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1answer
66 views
How to measure the thickness of 3D printer filaments? [closed]
I need a sensor set up for measuring width of the 3D printer filament. Other than line scan cameras (which I can't afford) what else is good for low accuracy non contact measurement? Can a Raspberry ...
0
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1answer
81 views
Which sensor to use to detect when someone walks past the sensor?
I am working on a electronic project. The goal is to detect motion when someone starts walking up the stairs. When this happens data is send to microcontroller and lights are turned on.The problem is ...
0
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1answer
30 views
Does the standard for M12 A-Coded 4-pin plugs (female) have a dummy center hole to accommodate 5-pin socket (male) connectors?
I have a project that will tap into an existing sensor that uses a 4-pin M12 A-Coded connector. My plan is to use a Y Splitter to allow me to tap a parallel connection to the sensor.
The splitter I ...
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0answers
52 views
Fluxgate magnetometer design for a non-electrical engineer
I am working on a project where I have made a fluxgate sensor. The sensor consists of a drive winding and a sense winding. I have a function generator going into an amplifier (to drive the core to ...
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0answers
27 views
How to wirelessly stream from sensor such as Adafruit LIS3DH
I'm extremely new to electronics and with some help, I was able to identify an accelerometer (Adafruit LIS3DH) that matched my needs, but I have no clue how to stream data from it to my computer or ...
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0answers
30 views
Sensor for tank fluid measurement
What kind of low cost sensor can be used for a tank fluid level measurement up to about 1m distance, with accuracy of about 5%. Interface to controller can be anything reasonable (SPI, I2C, digital, ...
0
votes
2answers
75 views
Measure if bottle level is empty
Consider an upside bottle with liquid (water) oozing out from pinhole on head. I need to detect if water falls below a certain level.
I searched and saw there are multiple sensors already available ...
0
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1answer
51 views
Is it possible to achieve an accurate 2D trilateration result with 3 sound sensors which are aligned on the same axis?
I am about to embark on a little project involving trilateration which is intended to find the originating point of a sonic wave using a microcontroller and several sound sensors.
I have seen sensor ...
1
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0answers
28 views
Correct design of capsense controls
I am trying to design a PCB with some capacitive controls. My first iteration did not seem to work well:
This was a 2-layer 1.6mm board with one circular control, and 5 buttons. The board is 48mm ...
10
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4answers
1k views
Intended purpose of temperature sensors inside an IC/microcontroller
What is the intended purpose of a temperature sensor (TS) inside a microcontroller?
Of course, you could say it is to measure the inside temperature of the IC, but also depending on the ambient ...
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1answer
55 views
Determine the output voltage of a signal conditioning module
Already, apparently from the feedback I got from this: How to model the output signal of this circuit?
It is better to just explain the whole thing. I am doing a project involving a LDR sensor that is ...
-1
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1answer
112 views
Thévenin equivalent: is this resistor useless?
I am doing a lab project that includes a sensor connected to a signal conditioning module. I am analyzing the circuit to understand more about how it works and I came across this:
That voltage source ...
-1
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0answers
17 views
How can I stream data from MATLAB mobile to MATLAB desktop with mobiledev function?
I am trying to write a code which is counting steps by acceleration data. I sourced this example: https://www.mathworks.com/help/matlabmobile/ug/counting-steps-by-capturing-acceleration-data.html
This ...
0
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1answer
77 views
DPS310 altitude sensor values changing over time
I am using a DPS310 pressure altitude sensor. I tested the sensor with an Arduino using the Adafruit DSP310 Barometric Pressure Sensor Library.
Initially, the sensor gives 70.5 meter altitude. In the ...
0
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1answer
91 views
How to connect multiple digital sensors with single wire?
I am new to Arduino, and I have a problem that I can't solve on my own.
I am trying to connect multiple PIR motion sensors with a single wire, in parallel and onto one pin on my Arduino.
I am thinking ...
0
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1answer
88 views
Help identifying scooter hub motor components related to temperature
I got a Jetson Bio scooter because it was not working (still isn't). It exhibited a notchy hub motor when pushed by foot. After taking it apart I found that the MOSFET for one of the motor phases ...
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3answers
105 views
How to read and identify multiple (8-15 sensors) temperature sensors for a Pi Pico/Zero?
I'm planning to gather data from several Pt temperature sensors:
...
0
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1answer
21 views
Connect DC 6-30V 1-Way Relay Module Power-off Trigger Delay Cycle Timer Switch with PIR Motion sensor?
I am trying to connect a DC 6-30V 1-Way Relay Module Power-off Trigger Delay Cycle Timer Switch with an HC-SR501 Infrared PIR Motion Sensor Module.
The output of the motion sensor is only 3 V. Do you ...
0
votes
1answer
23 views
Calculation of an error of a non-linear FSR produced by the connection of the voltmeter
Background: I'm studying my master at Computer Science and took a course that requires some understanding in electrical engineering. Unfortunately I have a very basic understanding of electrical ...
0
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2answers
59 views
Arduino: convert analogRead from photodiode in a distance in cm or mm?
I am doing a very simple project on Arduino consisting of an IR LED and a photodiode that measure the distance from an obstacle. I am using an Arduino Nano BLE that has a 12-bit ADC converter.
I am ...
0
votes
1answer
30 views
How decide which pin right for interrupts?
I would like to ask about I2C sensor's interrupt pins connection to STM32F. I use ADXL345 Ggyro sensor. I would like to connect sensor to STM32F446RE (64 LQFP). But I do not know what I need to know ...
0
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1answer
54 views
compensating for voltage divider computing sensor board analog reading
I'm looking at air quality sensors with the intention of monitoring indoor air quality.
One sensor I'm looking at is the Waveshare Dust Sensor Detector Module with Sharp GP2Y1010AU0F Onboard. See ...
0
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2answers
69 views
Why does the DHT11 have a non-connected pin?
I am using a DHT11 sensor. I was looking at the pin configuration, and I don't understand why a pin is not-connected but still there.
It has 4 pins:
Vcc
Signal pin
Nc (not connected)
Gnd
Why is ...
2
votes
2answers
103 views
Modelling I2C capacitance for cables under water
My setup works fine with following combination of hardware:
Raspberry Pi4 connected to a TCA9548A I2C Multiplexer from Texas Instruments, whereas each channel is connected over 4wires (GND, VCC, SDA, ...
2
votes
0answers
77 views
I2C Port on Raspberry Pi RPI4 recognizing arbitrary sensors
I am using a TCA9548A I2C Multiplexer from Texas along with two I2C sensors 'behind' / in series with each of the 8 Multiplexer channels. The Mulitplexer has the address 0x70, the two sensors have ...
5
votes
2answers
461 views
Pull-up resistors on I2C port
Hi everyone, I am confuse about I2C pull-up resistors. I use 4 I2C sensors. I am not sure is it true that pull-up resistors count. I use every sensors for pull-up resistors. If I use just one I2C port ...
0
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1answer
58 views
Why does increasing torque on DC motor in circuit affect the speed and functioning of another DC motor in the circuit?
I am working on a project in which there are system components listed below as module:
8 ultrasonic sensors 12-30 V (Sensor module)
3 DC motors (Drive module)
35 V to 5 V buck converter and a 35 V - ...
1
vote
1answer
64 views
How to integrate a conductive adhesive sensor
I am working on my final project for uni, in which I am building an electrical circuit using a force sensor that has conductive adhesive. I am unsure how to integrate this sensor into my circuit, ...
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0answers
36 views
How to hook up ultrasonic sensor pair to arduino board? (Reposted after closing) [duplicate]
I have a pair of ultrasonic sensors, one of which is a transmitter and the other is a receiver. How do I hook them up to the Arduino board? The board is an Arduino Uno board and the sensors are ...
0
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1answer
61 views
How many sensors can I interface with an Arduino Uno R3? [closed]
I got my final project to make, and I have a couple of questions regarding the Arduino Uno R3, as I have only worked with simulated ATMega on simulating software until now.
I must mention I am not ...
3
votes
1answer
123 views
Why do speed sensors fail so often?
The typical vehicle speed sensor (variable reluctance sensor) is a very basic device which essentially amounts to a coil of wire wrapped around a permanent magnet.
Simple, yes, but very reliable? ...
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votes
1answer
53 views
Can I divide a MIPI Clock between two MIPI CSI Cameras?
So, I'm facing this problem I have encountered while building a pcb.
I need to mount two MIPI CSI cameras (2 data lanes each) onto a chip that has 4 MIPI data lanes. The thing is, the chip only has 1 ...
0
votes
1answer
68 views
How to (generally) identify a temperature sensor? [closed]
What should be the approach to figuring out what a temperature sensor is, when taking apart an appliance or “reverse engineering”?
This has come up in a couple scenarios for me recently:
I am ...
0
votes
1answer
69 views
Motor noise problem
I am building a POV display, where all modules work with 5V (Raspberry Pi / apa102 LED strip / motor).
First I built an ESC module using a universal PCB which uses 5V from the power supply and a PWM ...
0
votes
3answers
77 views
Measure ball speed with sensor inside
I came across a product which is a ball with a small Bluetooth sensor placed inside. This sensor, coupled with an app, can measure ball speed, height and length of throw. I wonder how this is possible,...
0
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0answers
32 views
Minimum Distance between two magnetic rotary encoders in an array : AMS [AS5048B]
I am planning to prototype with multiple AS5048B sensors. (Very basic: Magnets are horizontally placed over the IC that the IC can detect and give an angular reading). I plan to create an array of ...
0
votes
1answer
59 views
My light-dependent resistor gives a fluctuating serial output
I'm a high school student trying to make a light tracking single axis solar panel. I am using an Arduino Uno rev3 board.
When I first finished building it, the system failed to operate. I spent a few ...
0
votes
1answer
68 views
RS485 MODBUS ARDUINO: Print multiple response data frame from soil sensor
Hi everyone. I'm guiding myself from tutorial https://how2electronics.com/measure-soil-nutrient-using-arduino-soil-npk-sensor/
I'm using...
Hardware components:
RS485
Arduino uno
Charger 9V (Only for ...
1
vote
1answer
79 views
Sensor options to detect when a ball crosses the goal line
First off I want to acknowledge that a similar question was asked about 7 years ago. For my senior project I am trying to develop a goal line technology for my club. From what i can find online, my ...
0
votes
1answer
104 views
How to detect which finger touched the mobile screen [closed]
I'm working on a project where I need to detect which finger touched the mobile screen i.e capacitive screen.
I'm not talking about double finger touch or single or drag and move etc. I'm asking which ...
1
vote
0answers
73 views
I am trying to design a basic CMOS Image sensor
I am new to electronics so I might be doing some bad mistakes on my design but anyways,
I'm trying to build a CMOS Image sensor using Proteus, and I couldn't find some basic tutorial to follow, Yet I ...
