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

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Sensor Choice for Dance Dance Revolution gamepad

Well over a decade ago, Dance Dance Revolution (DDR) hit the arcade scene. It was always fun for me, and great exercise. I actually built several home-brew pads for the game so I could play at home. ...
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2 views

End to end delay distribution in WSN

I am trying to find the best way to measure the end-to-end delay (from sensor to sink), when using wifi connection. I would also need to send sensor data from my Iphone to the pc, and measure the ...
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17 views

Gyroscope sensor modeling understand

I'm trying to understand the gyroscope sensor model equation from this tutorial It says all sensor can be linearly modeled like this: and Sensitivity of sensor X-axis to X-axis inputs (Sx) ...
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38 views

Program to detect speed through GPS [on hold]

I am working on project i.e arduino with GPS to detect speed so I need help for same.I need program for make GPS work with arduino. Thanks
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49 views

how is wired communication of arduinos over 2km is possible

i want to transfer the data sensened by the sensor which is of few KB over a distance od 2 km so how is that possible
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1answer
14 views

Current and voltage from PV ( LTS25NP , LV 25-P)

So in my design I am going to sense two PV panels in series ( Both voltage and current) to extract the Maximum power point (MPPT by arduino) so the input of both sensors will be the PV output and the ...
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3answers
44 views

Which optical sensor for detecting moving paper?

I am building a mailbox notifier and looking for sensor and thresholding circuit suggestions to detect when mail is dropped in, here are my requirements: very low power (when no motion at least) sub ...
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1answer
51 views

How to control the temperature of heating element

I am developing a heating application where temperature need to be constant. I am planning to set the temperature @ 200 degree C. when my sensor find the temperature exceeding the set temperature how ...
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53 views

Water conductivity measurement AC, interfacing with arduino

I want to implementate this device, mentioned in the title. The problem is how to correctly build the " read out device" that is clearly a wheatsone bridge? But in AC, the problem is the signal ...
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36 views

Low power design

I'm working on a project, it consist to collect data from sensor : HTU21D for humidity and Temp (digital I2C) LDR for light (Analog ADC) Potentiometer for adjustment (Analog ADC) communicate the ...
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1answer
39 views

STM32F3 Discovery reading values from sensor using I2C

I need to read values from on-board LSM303DLHC (connected via I2C) sensor and send them through UART. UART part is working but PuTTy shows: "S▒▒" every restart... Can anyone tell me what's wrong? I ...
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90 views

Estimation of swimmer's velocity from IMU sensor

I am dealing with the problem of estimation the swimmer's velocity. In the same time data from IMU sensor and tethered system are acquired. Data from tethered system are reference data. From IMU ...
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48 views

Understanding use of accelerometers to measure angular (rotational?) accelerataion

Imagine this: A rod is attached at one end to a rotating shaft. So, as the shaft rotates from 0 to 90 degrees back-and-forth (in the xy plane), so does the rod. My goal is to measure the instantaneous ...
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17 views

How to do Serial monitor with Arduino Yun? [migrated]

I'm trying to read some values from a TCS3200 colorsensor using Arduino Yun. I have some code, which you can see below, that I used when I tested on the Uno. With the Uno everything worked fine and I ...
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2answers
74 views

Calculate pull-up resistor for phototransistors

I have made a sensor which uses six IR phototransistors, three per sensor block, opposite it is a matched IR diode(940nm). This is in turn connected to a MCU. The function of the circuit is an ...
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33 views

Sense continuity in cable and lock with MCU

I'm building a "smart" cable lock system where the user will put a steel fitting attached to the end of a steel cable into a lock aperture, after which the presence of the steel fitting needs to be ...
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1answer
47 views

Reading a resolver sensor with a long cable

I am trying to read a resolver sensor attached to a stepper motor through a long cable (500 meters). More specifically with a resolver to digital converter. However I get an error respect to the ...
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1answer
56 views

how can we detect overspeeding through sensor or by building up circuit ??

I am working on project to detect overspeeding through sensor. but i am not getting any information regarding sensor. All i want to do, sensor inside vehicle with arduino and gsm which will send out ...
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1answer
30 views

ADC ic's for SPI protocol [closed]

I want to know what are the ADC Ic's is suitable for SPI protocol? because i cant find MCP3008 ic in shops? No one having this IC. Thanks.
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54 views

Thickness Measurement

I would like to measure the thickness of a stack of paper without touching it. The measuring device needs to show if one sheet is removed. I do not need to know the measurement in inches. Units are ...
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1answer
38 views

HDD read head signal

I read that hard disk read heads use "giant magnetoresistance" so I assumed that I could measure a resistance change in the presence of a magnet. Unfortunately I failed. The read head came from a 3 ...
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1answer
43 views

DH-11 Sensor on a Raspberry Pi & Arduino

I am trying to make my DH-11 sensor work on my raspberry pi but I have not succeeded after several attempts. I followed the following tutorial from Adafruit: ...
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3answers
49 views

Voltage range of a differential pressure sensor px26, and opamp saturation

Im using a px26 001GV differential pressure sensor for a project with arduino, here is the data sheet. (http://www.omega.com/manuals/manualpdf/M1608.pdf) Now, I have few questions regarding this. 1) ...
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19 views

Relative position of a sensor from other sensor or MCU

I am creating a project in which I need to get the relative position of an object (which has a sensor fitted) to the MCU which is receiving data from the sensor fitted on the object. I need to know if ...
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26 views

Magnetometer perpendicular to ground plane

A team and I are building some wearable tech that needs a magnetometer to know your heading. Unfortunately, we have to mount it "vertically" - imagine that the board is flat against your ...
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8 views

MLX90614 temp from PWM

I am using the mLX90614 IR sensor to measure temperature. I am using it in PWM mode. So I can get the high duration and duty cycle in my C code using timers on a microcontroller. The problem is how ...
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36 views

Finding a suitable sensor

I'm new to electronics and working towards a project. I was hoping someone could help me choose the correct component for my constraints. I'd like to know what type of sensor I should be using. It ...
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57 views

Is one accelerometer enough for detecting tilt/orientation of a rigid body?

I posted this question earlier in physics.stackexchange, but I think this is actually the best place for it. I’m not familiar with sensor hardware, and I don’t really know how an accelerometer works. ...
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46 views

what is an affordable indoor 3D positioning sensor setup?

I have a question regarding a problem that seems easy, but after already doing some internet searches, seems not to be that easy to solve. I have a non-moving test setup in a large room where I have ...
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1answer
34 views

Temperature sensor TMP36 Arduino problem

I have a TMP36 temp sensor. I already did the programmation of it, tried different settings, different code found on the internet. The sensor keeps giving me a temperature approximatly 10°C above ...
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1answer
97 views

Interfacing CT sensor to Microcontroller ADC

I am trying to connect a Split Core current transformer(CT sensor) to my microcontroller. My CT sensor gives an AC voltage as output so i cant directly connect the output of CT to microcontroller ...
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30 views

Does a Temperature + PPG integrated sensor exist?

I am trying to measure body's temperature and pulse from the ear (fitting sensors inside of earbuds). Does some kind of temp + PPG sensor exist? It would be great to reduce needed space. I could then ...
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2answers
116 views

Should I always put a low-pass filter on an ADC input?

I'm a recent hobbyist EE and new to micro controllers. I've built a test circuit to make measurements with a type K thermocouple, a PT1000 as well as an oxygen sensor. The weak signals go through a ...
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49 views

Gas sensors for multiple gases

I have some questions about gas sensors: If I want to detect several gases at once, do I just need one sensor or will I need one sensor for each gas? How will I know which gas I am measuring? ...
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38 views

If a sensor has both voltage and current outputs, how to calculate Vgs of the E-MOSFET?

If a sensor has both voltage and current outputs and connected as the Vin at the gate of a EMOSFET, how do I calculate the Vgs of the E-MOSFET? The Vout goes as the input for a microcontroller, where ...
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50 views

How to design circuit for robot motor

How to design a circuit which fulfill the requirement below. I am a chemical engineering student which do no have any electrical knowledge but still need to design a circuit for my project. Motor ...
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63 views

Tennis court lines, which sensor do I use to detect a ball?

I would like to make tennis court lines with a pressure/force sensor underneath them to detect when a ball is landing on them. On the internet I could only find very short pressure sensor that where ...
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3answers
93 views

Sending data from 4 transmitters to 1 receiver without a microcontroller

I am working on a project to wirelessly check whether any of four switches are pressed and I don't want to use a microcontroller on the transmitter side. I have worked with the cheap 434MHz HT12E/D ...
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1answer
63 views

Is there a thermal sensor technology that can measure an object heat at a distance of 10 meters for Arduino or atmega micro [closed]

I am looking for a thermal sensor with a distance of 10 meters . In my plan , I would like to recognize objects based on the heat. for example car.
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2answers
68 views

Temperature measurement into USB [closed]

I am trying to get a couple of temperatures into my computer. In my little lab I have about 50 thermistors that look a bit like this NTC-Thermistor. I now would like to get the temperature of all of ...
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28 views

What is the difference between OPB606 and TCRT5000?

I had to make a path following bot. I needed an OPB606 sensor for that, however I couldn't manage. Instead I used TCRT5000, but the bot is not working. Is there a similarity between these two sensors? ...
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50 views

Upper values of analog reading of sensor is cut off

We are using a dual element Motion sensor for our project. Here is the link of sensor we are using. Dual element Motion Sensor You can find the datasheet in the same link. This is our circuit ...
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24 views

Error in Magnetometer Readings

I have a magnetometer which I am using for orientation purposes. What i would like to know is how to calculate the total error when finding the magnitude of the magnetic field vector. So I know each ...
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1answer
118 views

ADXL345 Arduino UNO Activity Inactivity interrupt

I have DATA_READY, Activity and Inactivity interrupts mapped from INT1 to INT0 on the arduino. DATA_READY works fine, the problem is Activity and Inactivity are always set to 0 in the INT_SOURCE ...
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2answers
62 views

LVDT that is not an LVDT

I have been given a specification for an LVDT transducer where I was expecting a clear Va, Vb relationship. The Va and Vb are however described as having a phase and an non-linear relationship (i.e. ...
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1answer
47 views

What type of electrical sensing element is used in Water Quality Monitoring Meters?

What type of electrical sensing element is used in Water Quality Monitoring meters such as those pictured below? I might not be using the correct search terms. Some of these meters monitor Total ...
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1answer
39 views

Dual-axis Inclinometer

Im working on a project where im designing a device that can be worn on the arm (using the elbow as the fixed angle). Once the device measures 45 degrees I want to program it to vibrate. My question ...
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1answer
114 views

HX711 amplifier

I have one of the HX711 ADC devices that I want to use for a weighing application. I've fitted it to a breadboard and used demo firmware to poll the chip for readings. The behaviour is as follows: The ...
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2answers
303 views

Using Arduino Mega With lots of strain gauges

I was looking for a strain gauge shield for an Arduino Mega. I found this link which I found really useful: http://www.osengr.org/Projects/Load-Cell-Shield/Load-Cell-Shield.html At the bottom of the ...
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51 views

YHDC current sensor generats inaccurate values after hours , arduino

I am using YHDC SCT013 current sensor with arduino for monitoring the current profile of washing machines and using adafruit datalogging shield for the SD card and for the Real Time Clock. The ...