Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

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.

A transducer is a device that converts energy from one form to another.1 Use this tag for questions about transducers that convert to or from electrical energy.

1 Source: Wikipedia

168 questions
15
votes
2 answers

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, high-gain antenna. Alternatively, a bracket could be…
voices
  • 1,039
  • 1
  • 15
  • 29
14
votes
5 answers

Driving 50W-250W ultrasonic transducers with sine: Any Class B 135KHz monolithic power amp ICs?

My project needs to drive a medium power ultrasonic piezoelectric transducer from a sine wave (/ sawtooth) sweep generator that sweeps +/- 2% of the transducer resonant frequency. The question: What are my simplest options for driving these…
Anindo Ghosh
  • 50,188
  • 8
  • 103
  • 200
6
votes
1 answer

What type of ultrasonic transducers are used in medical ultrasound devices?

When I search on DigiKey for ultrasonic transducers, all I get back is the circular transducers that are sold for the various DIY projects. i.e. the picture below: However, the "medical" ultrasound devices have a wand, that houses an array of what…
KingsInnerSoul
  • 829
  • 14
  • 29
6
votes
1 answer

Thermocouple array for generating free electrical energy?

Thermocouple is a material (junction between two different metals) which generates potential difference in terms of millivolts, isn't it? Why don't we create a matrix of thermocouples (many thermocouples which are connected in series and parallel)…
hkBattousai
  • 13,913
  • 31
  • 114
  • 190
5
votes
2 answers

Measuring the resonance point of a piezo ultrasonic transducer

I assume it will be something along the lines of feeding it a sine wave via a resistor and measuring the signal across the resistor as the frequency changes. Does this sound viable? Also, on resonance does the current maximize or minimize? A…
user32885
5
votes
2 answers

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 receive just as efficiently. Could somebody…
Pyrohaz
  • 316
  • 3
  • 10
4
votes
1 answer

Ultrasonic Transducer driver

I found some youtube vids on Ultrasonic Cleaning, and thought it would be a cool DIY project. On eBay I found this. Some other transducers in the same range requires 400-800V supply. Anyone have any idea how to drive this thing? What kind of signal…
Jeffa
  • 99
  • 1
  • 8
4
votes
1 answer

Sensor/transducer for low pressure gas measurement?

First time poster here so let me know if I'm missing key info. I'm helping a friend create an Arduino-powered data collection system for his coffee roaster, and we'd like to track the natural gas pressure (in W.C.) being sent to the burners. Can…
Todd Price
  • 141
  • 5
3
votes
2 answers

ratiometric ADC, is it feasible to separate reference voltage and excitation voltage by an amplifier

I have a variety of bridge transducers (pressure, strain gage) with sensitivity of 1mV/V. Also, most 24-bit ADCs and analog frontend chips have a PGA with programmable gain between 1-128. This means that at the highest gain setting, the maximum…
Ben Voigt
  • 2,743
  • 1
  • 22
  • 34
3
votes
7 answers

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 by Sedra and Smith, it is mentioned that…
Rahul Tiwari
  • 39
  • 3
3
votes
3 answers

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 component that converts other form of energy to electrical…
cortantief
  • 63
  • 4
3
votes
1 answer

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 the doppler shift. I have disassembled one of the…
chaosmind
  • 145
  • 1
  • 8
3
votes
1 answer

What to do with ground wire?

I have a few I/p transducers(which work on 4-20mA loop current) and I have made a single cable for all of them, they each have posititive, negative and Ground wires. The controller I have for these I/P transducers have only positive and negative…
Veda
  • 131
  • 3
3
votes
2 answers

What's the circuit diagram symbol for a variable reluctance sensor transducer?

I know I've seen the symbol before, it's something like a circle with an open triangle facing in the direction of current flow with a line through the middle. I'm specifically thinking of the transducers in electric guitar pickups. I've seen the…
user3353751
  • 31
  • 1
3
votes
2 answers

How to amplify a low Amplitude, High frequency signal from Ultrasonic Transducer?

I am working with some ultrasonic transducers, the receiver gets a signal of around 10 mVp-p at 125 kHz and for its purpose needs a gain of around 10. So far have a simple inverting OP-Amp setup, however, unable to get a gain at all(Gains are…
Piers
  • 31
  • 3
1
2 3
…
11 12