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How to make your own passive AC and DC voltage measurement probes for ultrasonic analysis
Husain Shekhani • Nov 24, 2023
I hosted a webinar on November 24, 2023 on
"How to measure the d33 coefficient of a piezo ceramic by applying a force and measuring a voltage"
You can watch the recording on my YouTube Channel here:
Here is a link to the pdf of the whiteboard notes: Webinar 20 notes - custom 10x probe
Summary
In this webinar, I describe the theory of a 10x probe and practically how to make your own very simple 10x probe that does not require any compensation. This is super useful for ultrasonic and audio work.
***Announcement***
My next webinar will be on Friday, December 1, 2023 at 11AM EST. I will cover
"How to make impedance measurements of ultrasonic transducers using the Diligent Analog Discovery”
Here is the link to sign up for the upcoming webinar:
https://www.ultrasonicadvisors.com/monthly-ultrasonic-webinar
Follow the link here to learn about my ultrasonic transducer consulting services and prices
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I hosted a webinar on January 26, 2024 on " Everything you need to know about designing and assembling power ultrasonic transducers " You can watch the recording on my YouTube Channel here: https://youtu.be/oAMjCGBXYms Here is a link to the pdf of the presentation notes: Webinar 24 - everything power transducers.pdf Summary In this webinar I gave a "catch-all" presentation on bolt-clamped ultrasonic power transducer. Specifically, I discussed: -How to design a power ultrasonic transducer (bolt-clamped) -How to assembly the transducer - How to test the transducer *** Announcement *** My next webinar will be on Friday, February 23, 2023 at 11AM EST. I will cover "How to determine to determine the requirements of your transducer application using an R&D electrical driver” (Topic will change based on LinkedIn poll to come) Here is the link to sign up for the upcoming webinar: https://www.ultrasonicadvisors.com/monthly-ultrasonic-webinar
I hosted a webinar on December 29, 2023 on " What happens to displacement at the antiresonance frequency of an ultrasonic transducer " You can watch the recording on my YouTube Channel here: https://youtu.be/Zj9fXkaEADw Here is a link to the pdf of the whiteboard notes: Webinar 23 antiresonance displacement.pdf Here is a link to the Waveforms workspace file: webinar23_wvforms_displacement.dwf3work Summary Using a laser doppler vibrometer, I demonstrate that the mechanical displacement is not affected by the antiresonance phenomenon of ultrasonic transducers. In this webinar, I show experiments and talk about theory. I also talk about mechanical antiresonance. *** Announcement *** My next webinar will be on Friday, January 5, 2023 at 11AM EST. I will cover "How to measure the accuracy and linearity of an laser doppler vibrometer for ultrasonic transducers” Here is the link to sign up for the upcoming webinar: https://www.ultrasonicadvisors.com/monthly-ultrasonic-webinar
How to use multiple transformers to increase voltage and power delivered to an ultrasonic transducer
I hosted a webinar on December 15, 2023 on " How to use multiple transformers to increase voltage and power delivered to an ultrasonic transducer " You can watch the recording on my YouTube Channel here: https://youtu.be/Xb8JaKivXzw Here is a link to the pdf of the whiteboard notes: Webinar22_double_transformers pdf Summary In this webinar, I (1) Describe the use cases of using 2 or more transformers (2) Demonstrate voltage doubling using two off the shelf transformers *** Announcement *** My next webinar will be on Friday, December 29, 2023 at 11AM EST. I will cover "What is the difference in vibrometer measurements of an ultrasonic transducer at anti-resonance and at resonance” Here is the link to sign up for the upcoming webinar: https://www.ultrasonicadvisors.com/monthly-ultrasonic-webinar
I hosted a webinar on December 8, 2023 on " How to make Impedance Measurements of Ultrasonic Transducers with the Digilent Analog Discovery " You can watch the recording on my YouTube Channel here: https://youtu.be/B8llEdp1X2o Here is a link to the pdf of the whiteboard notes: webinar21_digilent_impedance.pdf Here is a link to the calculation script: analog_discovery_impedance_script.txt Summary In this webinar, I show how to make impedance measurements of ultrasonic transducer with the Digilent Analog Discovery. I go over the following topics: (1) Overview of hardware (2) Settings overview and measuring the accuracy of the measurements (3) Measure impedance response of ultrasonic transducer – like an expert! *** Announcement *** My next webinar will be on Friday, December 15, 2023 at 11AM EST. I will cover "How to use two transformers to double voltage gain in an ultrasonic transducer drive circuit” Here is the link to sign up for the upcoming webinar: https://www.ultrasonicadvisors.com/monthly-ultrasonic-webinar
I hosted a webinar on November 17, 2023 on " How to measure the d33 coefficient of a piezo ceramic by applying a force and measuring a voltage " You can watch the recording on my YouTube Channel here: https://youtu.be/iOslucScEik Here is a link to the pdf of the whiteboard notes: Webinar 19 d33 notes Here is a link to the finalized code, which measures voltage and converts it into MPa with the needed inputs: Webinar18_ads1115_20231110122622.zip Summary In this webinar, I show how to use an Arduino and the ADS1115 ADC to measure preload voltage of a transducer with high impedance impedance. I have a long discussion about using the ADS1115. I talk about theory, using the ADS1115, and show live demo and the Arduino code. *** Announcement *** My next webinar will be on Friday, November 17, 2023 at 11AM EST. I will cover "How to measure the d33 coefficient of a piezo crystal using a known applied force” Here is the link to sign up for the upcoming webinar: https://www.ultrasonicadvisors.com/monthly-ultrasonic-webinar