Questions tagged [transducer]
A transducer is a device that converts energy from one form to another. Use this tag for questions about transducers that convert to or from electrical energy.
181 questions
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SPICE modelling output/input coupling in ultrasonic transducer driver
The real device is this.
The LT SPICE model is here.
The schematic of the driver part of the circuitry (omitting power supply circuitry and relay circuitry that basically switches the driver between ...
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Can we think of an impedance or an admittance as a case for a transfer function?
We define impedance as the complex ratio of potential (voltage) over flow (current). We can describe it as how much a system "impedes" the flow according to a potential applied to it. But wouldn't it ...
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How to figure out SNR of a transducer
This is a novice question.
There is an accelerometer which outputs -10 to +10V voltage output.
If I sample the output for constant output(accelerometer is not moving), can I say anything about ...
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Some questions about power supply noise and transducer wiring
A 24V SMPS power supply is used to create a +/-12V bipolar supply.
This bipolar supply then powers this accelerometer transducer which converts small mechanical vibrations to amplified voltages.
The ...
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Through-Glass WiFi Antenna
I used to install a lot of in-car UHF radios & hands-free cell phone kits. I mostly worked on trucks & commercial utility vehicles fitted with bull bars, upon which I would mount a big, bulky, ...
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High frequency Ultrasonic transducer for finer mist making
I am looking to make Mist/Fog from water using ultrasonic transducer mist maker. A typical mist making products in the market are using 1.7 MHz ultrasonic transducer to make 5 Micron size Mist/Fog. ...
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A question about replacing voltage outputs with 4-20mA current outputs
Some transducers have both voltage and current output options.
I currently use voltage outputs with around 15m BNC cables single-ended. So they are open to interference as well. Sometimes during data ...
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7MHz Transducer Measuring Doppler Shift
I am currently messing around with a project I thought would be fun but am having some issues.
My goal is to use a signal generator to send a wave through my 7MHz (Steminc) piezo s-configuration ...
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How to converting an alarm to ultrasound emitter?
I've heard that it's much more cost effective to convert alarms to ultrasonic emitters vs outright buying ultrasound transducers.
How would you go about tackling such a project?
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Why is the graph plotted by |V0| in lvdt characteristics graph
In the transfer characteristics of an LVDT , why is the modulus of voltage taken and not just the voltage. In both cases we can see linear range so, what is the advantage of taking mod V.
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What does it actually mean by that a transducer has good dynamic response?
One of the basic requirements of a transducer is that it has good dynamic response. I am having trouble understanding the meaning.
My textbook says:
The output of the transducer should be faithful ...
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A question about temperature change of a transducer
This load-cell has sensitivity Cn = 2mV/V. In the data sheet the only part about the temperature coefficient is:
How can I calculate the change in sensitivity for a 10°C temperature difference?
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How to decide pulling low on an IC?
I am using MAX1484 chip for communicating thru RS485. It is a two way communications with Receiver and Driver built in. If I am to use only the receiver part and I want to disable the driver part, I ...
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Pressure Transducer to complete circuit
I'm using the Adafruit Feather nRF52 to build the HIDScan sketch which essentially allows completed circuits to transmit keys over bluetooth. I have a switch that connects from pin A0 to GND, and ...
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Issue reading pressure transducers and getting floating value
So I'm trying to read a Honeywell pressure transducer off an Arduino Mega and I'm just getting floating values. I've tried ground the line straight to the Gnd and then I get a consistent 0 but ...
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Electrical power in piezoelectric transducer
This question is from the book Diagnostic Ultrasound Imaging: Inside Out
By Thomas L. Szabo, regarding the power flowing into the piezoelectric ultrasound transducers.
In chapter 5 (transducers) page-...
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Can I monitor 25A peak to peak sinusoidal current wave precisely with this Hall-Effect Sensor?
I need to monitor a current on a PCB trace. The current is in sine form and its peak to peak 25A. I need to monitor it very precisely (+/- 50 mA) because I have to issue an interrupt output when the ...
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What are the range of pressure values we receive from an ultrasonic sensor?
While trying to receive ultrasonic waves from a Sonar using a pressure transducer what are the range of values of pressure I can get.
I need these values to buy necessary equipment for doing the ...
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Filter Design for Charge Output Transducer (accelerometer)
I am designing a low-pass filter for a charge output transducer. The filter must be passive and provide a 2nd order Butterworth response, no more than 0.01dB of ripple in the passband is acceptable.
...
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Unreliable pressure transducer readings
I have a relatively simple setup where I have an Arduino Mega reading a pressure transducer (transducer specs) and then I'm just watching the voltage readings over serial. It seems that I'm getting ...
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How to make a piezoelectric transducer buzz louder?
I am trying to make a piezoelectric transducer buzz loudly, but have so far only been able to make it create a quiet hum. I have tried using a basic amplification circuit with an NPN, but this made ...
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Does this circuit need any additional protection? Arduino to Pressure Transducer
So I'm powering and reading a Honeywell Pressure Transducer from my Arduino Mega board. I've got the circuit wired up as shown in the schematic below with the Excitation line from the Transducer going ...
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Inserting transducer model into a circuit
I'm not looking for complex explanations on transducer modeling, rather lets assume we have a very simplified transducer model of basically an R and C in series:
simulate this circuit – ...
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Beam pattern for a linear array comprised of rectangular transducers
I am looking for the beam pattern of a linear array with uniform spacing, d, between n elements.
I know for an array comprised of circular pistons it can be derived from
$$\frac{1}{n}\frac{\sin[n\pi\...
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How to reverse a pressure transducer output voltage
I am trying to set up an air compressor on my truck and run it through a Ford APCM (auxiliary power train control module). It has a 5v output. The APCM has a custom throttle control input on it. It ...
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Build a breathalyzer like device but for testing liquid or semi-liquid subtances
As a recovering alcoholic, I know for a scientific fact that alcohol will altogether evaporate from boiling water after sufficient time, and nearly all alcohol from boiling food, which would have a ...
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Hbridge for ultrasonic transmitter
I'm trying to build an ultrasonic transmitter circuit. The datasheet specifies 20V peak-peak for the ultrasonic to operate at its maximum power. However I'm limited to only using a 9V supply. What I ...
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Measuring current transducer output - differential or single ended?
I'm designing a front-end for an ADC that will be measuring the voltage of a hall effect current transducer.
I have been reading up on differential vs single-ended measurement, and have become a bit ...
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PT100 weidmuller transducers output
while looking for a PT100 transducer from weidmueller, I faced two types of output current: 4...20 mA and 20...4 mA . Why is it like this? what's the difference between 4...20 mA output and 20...4 mA ...
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Line In Amplifer to Piezo Help
I am trying to build a very simple amplifier type device to power a 4ohm 150 watt piezo tweeter. I am getting my signal from an mp3 player and then want to use a voltage source, 9-20 volts, to ...
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Current consumption of a current transducer (LEM LA 55-P)
I have a question regarding a current consumption of a current transducer (LEM LA 55-P). In the current transducer datasheet it says that the current consumption at \$ \pm 15~\text{V} \$ is \$ I_c = ...
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Electrical Dash Lines
Hi,
I am working on a hydraulic unit that has two LVDTs (position transducers). I don't know what is the purpose of those dash lines. I wasn't able to find my answer on Google. My experience tells me ...
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Transducers versus Sensors - applied to mobile robotics
I am doing some basic research for an upcoming personal project, learning everything I can relate to mobile robotics. This project will be used for my personal portfolio.
So, my questions are very ...
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What is the difference between ultrasonic receive and transmit 40khz transducers?
Having been looking for said transducers, I've come across both receive and transmit versions of seemingly similar products. I would've thought that due to reciprocity, a so called transmitter could ...
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Unwanted noise in oscilloscope display
Hi I'm a beginner on using an oscilloscope and I'm sorry if my question may be repeated in other posts.
I was working on a circuit with the following materials:
(1) an Al plate (5mm thick)
(2) a ...
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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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How to amplify a 25khz square wave that goes from -3.3v to +3.3v so that the amplitude is doubled
I have a 3.3v power supply (lithium ion battery) and am using a TI MPS430G2553 chip to generate a 25khz square wave using 2 PWM pins and a push-pull setup. This square wave goes from -3.3v to +3.3v. ...
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Design of variable split rail power supply
I'm attempting to drive an array of piezo transducers and am struggling to find a good design capable of driving from around +-5V to +-30V at about 2A for my testing. There are about 12 sets of ...
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12V sound transducer not loud enough
I implemented the circuit below using these components:
LOUDITY LD-BZEN-1212 - its description is "Sound transducer: electromagnetic; without built-in generator" and I am guessing it works like an ...
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DC-LVDT Output noise filtering
I am working with the DC-LVDT Omega 620-25
http://www.omega.com/pptst/LD620.html
Manual: http://www.omega.com/Manuals/manualpdf/M4345.pdf
Specs: http://www.omega.com/pressure/pdf/LD620.pdf
I am ...
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load cell continuously monitor load
I want use 50 kg of load cell of weighing machine to measure 30 kg of load for an one or two months,and load continuously decreases because of consumption on daily basis. my question is that the ...
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Driver for piezo atomizer/transducer
I am trying to drive a "piezo atomizer" which is pretty much a transducer from what I can see.
The specs on the transducer are as follows:
-30-50VPP
-Resonant frequency fr: 190 KHz±5KHz
-Resonant ...
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How to control the driving frequency when working with high power ultrasonic transducers
I would like to know the simplest solution to dynamically tune the driving frequency of an ultrasonic transducer to its resonance frequency.
My amplifier has a power meter that I can read an optimize ...
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Problems when loading an Ultrasonic transducer (reflected power)
I have a very simple setup that is giving me problems I cannot understand:
Apparently, the reflected power is the same as the power generated by the amplifier (both measured by the amplifier, ...
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Ultrasound project - voltage/current, pulse width
I need help with my ultrasound project.
My plan is to generate -170 V powering voltage with MAX1847 DC/DC from 5 V. Excite the transducer (2,25 MHz, 50 ohms at resonant freq) with square wave (pulse ...
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Piezo transducer current consumption
is there any way how theoretically determine the current consumption of ultrasound piezo transducer?
I only know impedance for res freq = 50 ohms and excitation voltage around -170 V.
Does the Ohms ...
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Gate Driver Voltage drifting?
I am using below circuit to differentially drive ultrasonic transducer.
It works almost as expected. However, I notice strange phenomenon if i observe the output at the transducer with dual gate ...
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Is there any pitfalls in converting (amplifying) analog DC signal from transducer to measurements, except noise
I need to measure force with a load cell and transmit it to a computer.
The load cell outputs 2mV/V for whole range. Vdd < 12V, so I have 0..24mV signal, which I assume is enough to have good ...
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Ultrasound transducer at different frequencies
An ultrasound transducer is specified to have two standard frequencies; 820 KHz, and 2.5 MHz, does this mean that any frequency in-between can be used?
If not, what would happen if a generated signal ...
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Need help in biasing TIP31 in common collector mode- edited
I am using an Arduino Uno board and R-2R DAC to obtain a signal which should vibrate a transducer connected across RL of common collector amplifier using TIP31C.
I need around 300mA of current to ...
