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

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zedboard sensor project [on hold]

Good day, I am currently working on Zedboard for education purposes. I would like to implement a project in which I will use a force sensitive resistor sensor and then I will have the force value ...
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1answer
43 views

How to read signal from Crankshaft Postition Sensor in motorcycle

I am trying to build digital tachometer for my motorcycle Yamaha FZS600 Fazer 2002. I have a problem with reading signal from CPS sensor. It is hall effect sensor, I suppose. I found the plug of it. ...
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1answer
34 views

Calcuation of Gain // Instrumentation amplifier

I am using an instrumentation amplifier for my project . The differential signal applied to amplifier through sensor is 0-2mV i was wondering if i replace 2k2(R5) resistor with a 5k pot ...would i be ...
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27 views

How to achieve great accuracy and precision of linear slide [on hold]

I'm building a linear slide of 3m in length that requires the load (2-3kg) to always stop at few well defined points. It is necessary that it always stops at the same points with standard deviation of ...
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1answer
41 views

How sound waves travel for reverse parking sensors?

Looking at (ultrasonic) reverse parking sensors, they're all installed with a (plastic?) cover like this: Traditional ultrasonic sensors are installed with a mesh: Since plastic reflects sound ...
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1answer
23 views

help on making a bluetooth proximity device [closed]

i want to make a small bluetooth proximity sensor. simply a small button like device that only serves as a bluetooth connection to my phone, and when my phone gets out of range of said device it will ...
0
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2answers
43 views

accurately move an object in linear steps with electro motor [on hold]

How would you tackle the problem of moving an 1-2 kg object in a linear fashion from point A to B to C and than back to point A and so on? Points A,B,C are fixed and require high accuracy. This image ...
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1answer
55 views

Precision positioning system

I'm looking for a sensor that can track its own position in 3D with an absolute accuracy of around 0.5inch over a 50-100ft area. I think this is better than what GPS or inertial tracking can ...
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1answer
43 views

differential pressure sensor gives oscillated result

I'm trying to measure water pressure of water pipe by exactly replicating this : http://www.practicalarduino.com/projects/water-tank-depth-sensor When I tested the sensor (by leaving both inlet free, ...
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1answer
27 views

Estimating inductance change by eddy currents

I have a planar coil with inductance L, operating at a given frequency. Now I want to estimate the eddy currents, which are induced in a piece of metal, which is placed in front of the coil, and the ...
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2answers
60 views

Sensor on I2C bus

We are using the Sensor. The sensor communicates with the MCU via I2C. Now, I2C specifications provision the max bus capacitance of 400pF. So, this dictates the no of slaves on my I2C bus. The loading ...
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16 views

Sensor trim error and output trim error

I have calculated the amount of sensor trim error as well as the amount of output trim error, both expressed in percent of span. However I am not sure about. This is what I have: Sensor trim error ...
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1answer
29 views

can contactor, water level sensor and heater all live in parallel on the same circuit

I want to connect my 3000w (220v) water heating element to a 220v water level sensor Automático de Nível so that the heating element won't turn on when there is no water present. But the level sensor ...
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40 views

How do I know if this sensor is broken? [closed]

My dishwasher won't start and I suspect the part depicted below (picture taken from an eBay ad I found when googling for the part number). Written on the part is ...
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2answers
78 views

When is noise a factor in basic analog circuits?

I have a good understanding of circuit theory, but only a few large projects under my belt. In practical applications, at what voltage level does noise really become an issue. Is there any 'typical' ...
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1answer
429 views

Propagation speed of telegraph signals

Time transfer in the late 19th c was best achieved by telegraph, a major improvement in the determination of longitude for geodetic surveying. A question was posed, to acquire a high accuracy time, by ...
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3answers
72 views

How to measure water heater temperature?

I'm building a summer cottage and plan to add some sensors for monitoring system health, with a Raspberry Pi and/or Arduino. Specifically, since electricity is not always available there, I'd like to ...
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2answers
127 views

Why does the regulated voltage go down?

I have designed this simple analog temperature transmitter. Specifically, this is a 2-wires loop-powered transmitter. The circuit is intended to measure temperatures from -50 to 400 °C. The first ...
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2answers
26 views

Close range ultrasonic fluid proximity level sensor

I'm looking for a way to sense a fluid's level from above, in a small package, with a relatively low dead zone. Most commonly available ultrasonic sensors (which I would see as the best option) have ...
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1answer
62 views

How to monitor temperature of an area? [closed]

What is the proper non-contact way to monitor the temperature of an surface area? In the picture below, I divided a square into 36 little squares. The goal is to get the temperature of each and ...
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0answers
17 views

Why does my camera program get stuck on the frame check?

I'm working the the FLIR Lepton thermal camera which is run by a python program that can be found here. The program used to run fine and I was able to use pylepton_capture to take a picture and then ...
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0answers
43 views

Analog input matrix (chessbooard)

I cannot find anything related to this problem anywhere, does it mean it's impossible? I want to have a chessboard with piece type recognition. My idea is to plug pieces into the chessboard using some ...
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1answer
38 views

Will massage electrodes work for eeg?

Have anyone tried to use massage electrodes for eeg? I believe as they conduct high charges probably using inexpensive metals they are not suitable for measuring tiny voltage changes but I'm not sure.
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1answer
43 views

Continous liquid level measurement loop connection device

I have 4-20mA loop device for measuring liquid levels. It was working well until I connected a motor (heavy load) to the same outlet(120Vac). I have this device ON and as soon as motor turns ON the ...
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1answer
47 views

Simple variable Capacitor circuit to feed ADC

I need to build a humidity sensing circuit that feeds an analogue to digital converter. (This converter is then going to send its signals to a raspberry pi for analysis etc). The sensor will be about ...
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68 views

Arduino Interface with I2C Flow Sensor

I have a Honeywell HAFUHT0050L4AXT I2C Flow Sensor that I want to read using an Arduino. Looking at the datasheet, I know that the I2C address is 0x49, and I have had a play with bits of code I've ...
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26 views

Optics for a triangulation laser distance sensor [migrated]

I'm trying to build a laser distance sensor using triangulation(With this as my main inspiration, https://sites.google.com/site/todddanko/home/webcam_laser_ranger) My plan is to use a linear CCD ...
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2answers
84 views

Low power, cost effective way to measure CO2 (or equivalent CO2)?

I'm trying to develop a system that will monitor long term CO2 levels indoors and will run on a battery. A lot of the conventional CO2 sensors are really power hungry and expensive. However, I came ...
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1answer
79 views

How can i make a water pump circuit

I have a plant that I want to automatically water. I have a plan to buy a small fountain pump which plugs into a wall. I am also going to build a small soil moisture sensor to see if the soil is dry. ...
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1answer
71 views

How can I determine the equation for the output voltage?

This is circuit is proposed for a thermomether based on the TSP102 sensor (linear PTC). How can I determine the equation for the output voltage? My main question is about the op amp. I know that two ...
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18 views

How can I find a relative yaw value from an IMU (MPU-6050) based on which direction is currently up?

I'm having a hard time putting this question into words but basically I have an IMU (MPU-6050) and am able to get the data to stream using the i2cDev library. The IMU is in a box and I want to be ...
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1answer
103 views

why would one use a current transformer with both live and neutral lines?

Could one use this to measure the phase difference if one had the voltage measurement? I have looked at the below household power meter, and was baffled by (what seems to be) the current transformer ...
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2answers
44 views

Fastest and most accurate tracking method for relative orientation and position throughout a large field? [closed]

I need to implement a system which must be able to track relative location and orientation of points within a large space. My first idea is something like a magnet and comm chip at the points of ...
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1answer
30 views

Detect multiple Hall Sensors on one input

I'm new here and to the electronics world, so my question may be dumb one! I have multiple Hall Sensors (A3144) that I wire to the digital inputs of my arduino: I am able to test in the code if each ...
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2answers
89 views

How does this current sensor work? (with only half magnetic core)

I have been working for sometime with current sensors (current sensor goes all around the conductor to get a voltage reference corresponding to the amperage), however i just found this little device ...
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1answer
74 views

Do you always need to clock out the old pixels when reading from a camera?

I'm writing a program to work with a TSL1401R-LF Linescan Module. It works by reading in a 1 X 128 array of pixels. I've gotten the camera to work properly and my ...
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73 views

Read or set registers in motherboard

With microcontrollers it is pretty easy to switch a LED on/off, by writing on a register. This question is instead an attempt to write to a PCI device register in a desktop computer. In a similar ...
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92 views

What is a good camera to use with a microcontroller? [closed]

I'm trying to build a low energy camera sensor and I need a camera that doesn't have a lot of output pins. I'm currently using the ATtiny85 to do my processing and it only has 3 analog input pins. I ...
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23 views

broad range flow sensor for water leaks and normal use

I've been thinking about a project for a house water flow sensor to detect both dripping leaks and catastrophic breaks. Available products detect water in several ways: moisture sensor on floor for ...
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2answers
29 views

Maximum Response time meaning?

I have a sensor, the manual of the which says it has a maximum response time of 1 msec. Does it mean the sensor takes at least 1 msec to respond or at max 1 msec to respond? I am confused because ...
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995 views

Can I “integrate” the data from an accelerometer to record a motion trajectory?

I would like use an accelerometer equipped device to record a motion trajectory, as high-resolution and low-noise as possible. For instance, let's say I run a jogging route of 6 kilometres, returning ...
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3answers
101 views

How can I bench test a Flame Sensor (Flame Rectification)

I am troubleshooting a gas heater and all test results point to the flame sensor but I would like to bench test the flame sensor. Any ideas on how I might set up a test environment with on-hand ...
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1answer
63 views

How to maximize the voltage range using an operational amplifier (differential amplifier)?

I'm trying to maximize the voltage range using voltage dividers and operational (differential) amplifiers, but am not able to do it. I do not have an electrical engineering background, but my project ...
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1answer
11 views

Minimizing capacitive crosstalk in open collector quadrature speed sensor

I am integrating a speed sensor (Honeywell SNDH-T4L-G01) which comprises 4 lines: VDD, VSS, A, B. The last two signals provide speed and direction information in a quadrature format. These are open ...
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412 views

How CRT allows use of ligh-guns or pens etc?

While reading about CRT on Wikipedia, an information (CRT Allows the use of light guns/pens; https://en.wikipedia.org/wiki/Cathode_ray_tube#Advantages_and_disadvantages) suddenly triggered a a vast ...
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1answer
47 views

How to calculate capacitance analytically?

Im developing a capacitive sensor of concentric cylindrical plates type.I know its dimensions(length & diameter). How i can calculate its capacitance without using any multi-meter or LCR-meter?
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4answers
62 views

How to measure capacitance of a capacitive sensor?

I've started working on capacitive sensors and finally got one ready(which is concentric cylinder type) but now I need to test it. I have few doubts: Can I calculate the value of capacitance without ...
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2answers
79 views

Are there any dedicated chips for measuring logic supply voltages?

If I reboot into my PC's BIOS/UEFI I can get "instantaneous" readouts of its 12/5/3V3 voltages to 3 decimal places. How is this classically done? Is this just a classic resistor divider into an ADC ...
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82 views

ADXL345 GY-291 weird measures

currently I am trying to connect several ADXL345 to an Arduino Nano. I followed the Sparkfun Tutorial on how to do this (https://www.sparkfun.com/tutorials/240). Long story short, I connected two ...
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70 views

How many DS18B20 temperature sensors can I connect to one bus arduino?

How many temperature sensors can I connect to one bus without losing accuracy.Can I use for example 50 sensors to one bus? Should I change the resistor when I connect too many sensors? Here is the ...