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.
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Signal conditioning for a current transducer
I am using a current transducer (LPSR 15-NP) to measure the current that is flowing through my AC servo motor powered by my SVPWM PCB. I have currently implemented an open loop control to the motor ...
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How to lower down output power of low power ultrasonic transducer?
I'm currently using a low power ultrasonic transducer for micro machining on ceramic. Kindly refer below for the spec of the low power ultrasonic transducer,
Output Power = max 2.0W (can be adjusted ...
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Help testing Pressure Sensors
I have a few ME600 Metallux sensors that I harvested from some discarded products. I want to build a project with these but would like to verify they work before getting too far. From the datasheet ...
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Transducer for ultrasonic lens cleaning
I recently discovered TI's ULC1001 driver chip for ultrasonic lens cleaning. I'd like to try this in my next project, but I'm not sure what transducer to use.
For an application like his, are ...
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Lowrance Sonar Pin outputs
I have this Lowrance fish finder HDS 7 gen 3 that uses a HST-WSBL transducer to map the ocean floor. I wanted to use the transducer on its own with a Arduino. I looked into the pin-out of the fish ...
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How do 4-20 mA transducers work?
I am quite new to the instrumentation of electronics. I have noticed that most transducers that are used in the industry only use 2 pins, where it is usually marked with a positive 24V pin and an ...
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How to amplify signal enough to make a Langevin transducer vibrate?
I'm a little out of my zone of mechanical engineering here, so I'll need your help.
Up to date, I got the right frequency (40 kHz modulated for a 200 Hz low frequency) coming out of my function ...
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Ability of transducers to produce sufficiently amplified signal
Transducers are responsible for conversion from one a form of natural signal into electrical signal. Example - heat variations into electric voltage variations.
In the book Microelectronic Circuits ...
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What cable is this, and what is attached to the end? [closed]
I have a question regarding the cable in a red square, namely that green thing.
This is a video from YouTube and I am trying to recreate the same. I want to connect the same type of transducer to the ...
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How can I use 16mm 40kHz waterproof ultrasonic transducers to measure distance?
I have these 16mm 40kHz waterproof ultrasonic transducers：Manorshi MSW-A1640H12TR.
I am wondering how to measure distance with these transducers. I desoldered the non-waterproof transducers from a US-...
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Why doesn't a guitar pickup's top and bottom cancel itself out? [closed]
A guitar pickup is a coil of wire with some magnets in the middle. The magnets magnetize the steel guitar strings. When those strings a strummed, they vibrate, and since they're magnets they induce a ...
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How to figure out the current drawn by a 40kHz ultrasonic transducer?
I have some 40kHz ultrasonic transducers (the same type as which you find in the common Arduino ultrasonic distance sensors.) All information comparable to a datasheet I got was:
I don't get how to ...
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Differential capacitive transducer
I would like to design a differential capacitive transducer to measure the capacitance change in an accelerometer.
I cant seem to understand, how to demodulate the signal and keep the actual DC value....
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Hall effect sensor output
I am planing to use an LF 510 -S / SP15LEM current transducer.
I am expected to sense -300A to 300A. What is the output of the Hall effect? Is it mA or mV?
If it is mA I will need a resistor to have a ...
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Accuracy Class and Full Scale
I am using this formula to calculate the class of an instrument:
\$\text{Accuracy Class} = \frac{\max{\text{(Absolute Error in Range of Measurement)}}}{\text{Full Scale Value}}\$
The question is, FSV ...
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Large signal current measurements of a loudspeaker
I'm trying to work out a method of measuring electrical current through a loudspeaker load for voltages in excess of +-20 V to be read by an audio interface - I need to scale down both voltage and ...
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VCO generating a lot of electrical noise, picked up by ultrasonic transducer
In my setup, I have a VCO CD4046 Phase Locked Loop IC generating a square wave, and an ultrasonic transducer set that transmits and receives that setup. You can imagine it looking something like this.
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Offsetting an ultrasonic receiver's signal for an amplifier with a floating ground
I have an ultrasonic receiver that I'm putting through an amplifier. I've created a floating ground for the amplifier (because I want to pretend having a negative voltage supply). However, to achieve ...
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What does 'Output load (pull up or pull down' mean on a datasheet for a pressure transducer?
I am setting up a sensor network to monitor a few things including pressure. I am going through the following datasheet, honeywell sensor, and it has a field called 'Output load (pull up or pull down)'...
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Determine how to drive and read an unknown three wire pressure sensor
This three-wire pressure transducer pinout, drive type, and electrical specifications are unknown. It should be a typical industrial transducer. I have tried assuming it is an amplified device with a ...
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Spark generator current limiter
I am using a spark generator for electrical discharge machining and mounted a current transducer to read the current value of the arc between workpiece and electrode.
When the electrode gets too near ...
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Why do ultrasonic cleaner transducers usually have two piezoelectric discs (or rings)?
Most of the diagrams for them I've seen show that. Is it for the purpose of amplification, or some other reason?
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Ultrasonic transducers driver review (25 kHz, 150 Vp-p)
Transducers specs:
Resonance frequency = 25 kHz +/-1 kHz
Maximum driving voltage = 150 Vp-p
Capacitance = 2.4 nF +/-20%
Proposed driver circuit and simulation:
Seven transducers are driven for a ...
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Component identification - ultrasonic transducer
We have a Chinese made ultrasonic transducer, 120kHz approximately, 25mm x 25mm dia.
It has three wires - red, green and white. The body is PVDF
We have determined that the red and white are used to ...
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Can this buffer provide adequate current to drive an ultrasonic transducer?
I am using a BUF634P Buffer (Datasheet) to drive a wideband ultrasonic transducer. The impedance of the transducer varies with frequency and reaches a minimum X = 100 Ω, while its resistance (...
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What sort of iron rod should I use in a magnetostriction oscillator?
I'm trying to make a magnetostriction oscillator at home. Here is the circuit diagram:
1 DC Power Supply
2 Ferromagnetic Core (Iron)
3 NPN Bipolar Junction Transistor (2N2222)
4 Capacitor C
5 Primary ...
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How to build a circuit which allows a piezo transducer to act as both a transmitter and receiver
I am a student and am currently working on a project where I require a piezo transducer to act as both a transmitter and receiver. I am finding it difficult to build a circuit where a pulse can be ...
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Is a dsPIC33 suitable for creating a 40 kHz signal with 16 bits of resolution as input for ultrasonic transducers?
I'm trying to build a parametric speaker (Directional speaker) that could output a somewhat decent and high-quality sound hence why I'm aiming for a 16-bit resolution.
The audio signal needs to be ...
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Cost-effective current monitoring solution for PIC
I'm in search of a cost-effective solution for monitoring the current draw in a resistive heating element using a PIC.
All of the Hall Effect sensors that I've looked into seem to output the same AC ...
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Read 4wire pressure transducer via a differential amplifier
I have been trying to read a 4wire pressure transducer (M3021-000005-01KPG) with a microcontroller, but problems keep arising. First of all, I realized that the signal (0-100 mV) is differential, ...
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Can I use Op-Amps to drive a ultrasonic piezo transducer at 200kHz
I’ll admit I’m not the most knowledgeable guy when it comes to electronic circuits, so I thought I’d ask before breaking anything.
I’m looking to drive a piezo transducer using a 200kHz sine wave. The ...
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Is a potentiometer an actuator or sensor?
While I was taking notes I get confused by the component named "potentiometer", I don't know in which category I should place it.
If I'm correct the definition of a sensor is broadly "a ...
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How to match Transformer output Impedance for Ultrasonic Cleaning Transducer
I have a transformer outputting the 240VAC 40kHz. The Transducer is 50W, 4100pF, 10-20 Ohm at resonance, ~40kHz resonance)
The Secondary of the transformer is 12mH.
I am trying to match the impedance ...
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TRT-25 and Arduino Uno
I need help on a project I am working on.
We are trying to integrate a reaction torque sensor and I am having a hard time deciding how to go about it.
Previously I assumed that like my load cell I ...
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CW Doppler probe for fetal doppler and blood flow velocity
I am currently working on a microcontroller based project to measure the blood flow velocity using ultrasound doppler.
I have purchased two Spengler 8 MHz continuous mode probes in order to measure ...
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How does pulser-receiver circuit work
I want to set up an experiment exactly as given in this data sheet for the T/R switch that I recently bought (the MD0101):
Every pulser receiver circuit that I’ve found neglects to address what ...
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Reducing resonance in a piezoelectric ultrasonic transducer
I am using a piezo transducer to launch an ultrasonic pulse in air, at a frequency of 125kHz. A picture of the received waveform is attached. My question concerns how I can (electronically) limit the ...
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What is limiting high frequency ultrasound from being high power
This is mostly just our of curiosity and I feel like I may be missing something basic, but what is limiting ultrasond transducers in the range of 500kHz-MHz from not outputting higher power like the ...
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ADC input filter design for DC input signal
My plan is to use an ADS1115 ADC to read a low impedance 0-5V output signal from a level transducer. The ADC data sheet gives guidance for ADC input filtering. This data sheet, and even other input ...
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Parallel Resonance in Ultrasonic Transducers (Langevin)
I am working on a power-supply for ultrasonic welding machines and want to drive the transducer at its parallel resonance.
The Butterworth-Van Dyke model paramters are : L = 24.73e-3; C = 1.14e-9; Cos ...
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Pressure to current conversion
I was trying to convert the pressure values (in psi) into 4-20mA current. The range of pressure values I have chosen is between 0-10Psi. But according to the link given below the pressure from 3-15Psi ...
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communication via ultrasound
I want to communicate simple requests and ids over ultrasound.
To do this I need to modulate a message onto a 40kHz carrier to drive a ultrasound transducer.
Here you can find a simulation of what I ...
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How to measure the voltage over a transducer? aka how to measure ultrasound
I want to measure ultrasound.
For this task I bought a sensor, and an instrumentation amplifier.
Apparently it doesn't work the way I thought because when I test it with a sample 40 kHz wave as input ...
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Understanding the workings of an ultrasonic sensor
I am trying to simulate an ultrasonic sensor using a ray-based approach. For that, my current process can roughly be described as such:
approximate wavefront using rays that mimic the shape of the ...
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Battery powered 4-20mA sensing application
I have a base system that runs on 3-AA batteries which it regulates to a system voltage of 3.3V. I want to interface that system to measure a 4-20mA sensor. For the sake of argument, lets say that ...
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How to simulate Magnetic Transducer Buzzer (SMT8585-03H03LF) in LTspice- any model available?
I am adding a Magnetic buzzer into the design.
Buzzer part number is SMT8585-03H03LF from Bestar electronics.
Below are the specifications for quick glance.
Is it possible to get a LTspice model for ...
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How to read the following datasheet of a sensor?
I wanted to write about static and dynamic characteristics of the Honeywell pressure 19mm transducer. I found my sensors datasheet but could not find the following characteristics mentioned in the ...
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Questions about a wiring diagram of a transducer
I have an old current output wind-meter with the following diagram:
Unfortunately there is no online documentation about the device so I had to take the above photo.
I'm curious what could be the ...
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Are ultrasonic Tx/Rx pairs really just the same sensor?
I want to retool the classic HC SR04 rangefinder to be able to do ToF gas flow sensing. I need to be able to do ToF on a column of air in both directions, so it benefits me to be able to use the ...
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Ultrasonic transducer circuit
Can someone explain how these work ? I want to make my own ultrasonic bath, but I can't find any useful specs. Do I need some specific circuit to run them or it's just 'plug and play' ?
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