Ultrasonic drive circuit that non-electrical engineers can understand
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- čas přidán 4. 06. 2024
- In this webinar, I covered the most basic circuit that can be used to drive an ultrasonic transducer. I made this video specifically for non-electrical engineers because I boil down concepts to core ideas and only use 2 circuit components to build the circuits.
Here are the topics:
[5:30] What a circuit needs to provide a transducers to be driven
[16:00] Theory of the super simple circuit
[31:00] Construction of the super simple circuit
[39:40] Experimental results of the super simple circuit
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www.ultrasonicadvisors.com/mo...
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www.ultrasonicadvisors.com/
Great video. Thank you so much. Do you have a video explaining how to increase the efficiency?
Very good and simple explaination. Thanks for the video
Really really excellent presentation. I am excited to learn more from your lectures. When you said 2 components, I thought you were joking. (2 components plus a board with another 1000.) I knew one had to be a switch (which I figured would be a transistor). Another had to be a power source, and when you explained that an ultrasonic transducer was a capacitor then I knew you would need a resistor to get the transducer back to “zero.” Then I thought the power supply wasn’t in the 2 parts.
This class makes me excited to look for more if your CZcamss because, if the transducer can be driven with 2 components ($6, at most, but more likely 6¢), (not including the power supply) then why does every driver board I see on eBay have 100 parts at least and cost $40-100?
Exciting.
Thank you again.
Super! Thank you very much!
Would be interesting to see how the receiver circuit looks like too
How to drive this hesentec rank e transducer?
Can I do this via Microbit?
How much oomph you can put into this and other transducers would be good as their data sheets seem very ambiguous about input and output, interesting though. PDF's for these ultrasonic transducers suck.
I agree. However, transducers are not well characterized expect as characterized in the final assembly by the end user engineer. They are not like a MOSFET. They are more like buying a bar of steel which you will make into something else with it's own properties based on what that thing is.
What voltage should we be using for langevin transducer ?
In general, from 40V to 400V
Hi Husain
Does any piezoelectric crystals increase or decrease Toto volume . or do they just change shape while preserving total volume? if so which crystals produce the most change in total volume , if not are you aware of any material that changes total volume when voltage is applied?
Lead free ceramics have low poisson's ratio. That means they change volume more than PZT materials with an applied voltage, relatively.
At 39:33, on the actual breadboard, it looks like the 5V Signal from the Frequency Generator is going to the Drain on the MOSFET, not the Gate? Shouldn't that red wire running from the probe go to the left-most pole on the MOSFET? Or am I mistaken?
Great set of videos, btw -- very helpful!
I watched it and you are right - the signal generator should drive the leftmost pin. Thanks!
@@ultrasonicadvisors Thanks! I’m new to this and was trying to make sure I understood how it all worked.
I’m not in live chat but the circuit is a mystery to me because if I look at one there are a hundred parts that are individually mysterious and cumulatively a huge mystery.
Dear Husain, I m wondering if you could cover the amplification part since most of the piezo transducer will require power amplifier. What is the minimum amplification required for one piezo transducer? How to determine suitable amplifier ?
You need to determine your power requirement. If your amplifier meets the power specification, you may need a transformer to increase the voltage (step up) or a transformer to incresae the current (Step down)
Why not charge and discharge using zero crossing by charging to 5V, discharging to -5V?