25 Questions 15 Answers 0 Followers
Questions related from Ju Cheng
The stainless steel bolt destroyed my front mass(AL7075) threads ☹️ any advice? this is for an ultrasonic transducer
10 November 2023 8,884 1 View
I have a current transformer on the output of my inverter that is working as a feedback. From it i have a sinusoidal waveform that i want to find its phase shift in respect to pwm signal of...
05 June 2023 144 1 View
Is there a zero crossing detector inside the stm32 itself?
05 June 2023 4,359 0 View
what are the applications of zinc-containing dust ash from steel plant rather than recovering it?
26 March 2023 8,307 0 View
I am looking for a FAB that can make InP based photonic integrated circuits based on provided custom design, please help me to find one? Somewhere in china or asian countries will be better
23 March 2023 5,842 1 View
I want to know can I use fdtd to simulate the behavior of a single photon inside a mach zehnder? If not, how can I calculate the needed parameters of a mach zehnder for a single photon?
31 January 2023 2,972 0 View
I need to learn to code STM32 microprocessors. How can I learn it fast and professional?? Please share your experience with me
24 December 2022 9,691 3 View
I am designing an inverter circuit to produce 20khz, high current and high voltage power for an ultrasonic transducer. I want to know what are the parameters in choosing a mosfet for my application?
17 December 2022 7,031 2 View
what are the methods to protect mosfets in a high current and high voltage inverter?
17 December 2022 6,364 3 View
I am going to make a setup for generating and manipulating time bin qubits. So, I want to know what is the easiest or most common experimental setup for generating time bin qubits? Please share...
25 November 2022 9,414 1 View
I am looking for a circuit design of a 200 watts ultrasonic homogenizer. I would appreciate if you share any data about this
26 April 2022 3,772 2 View
I am looking for a technical guide for ultrasonic homogenizer design and manufacture. I need a detailed explanation about how to design a transducer, booster and horn system for homogenizing...
20 April 2022 1,027 6 View
I want to build a 100W 20khz ultrasonic transducer. where or how can I find the dimensions? my pizeo stack dimensions are: 50 17 6.5 mm
04 April 2022 2,039 8 View
I need to design and simulate a power supply(generator) to drive 6 transducers. power of each transducer is 50 watts and they work at 40khz frequency. can you please share a design of such...
07 March 2022 7,066 4 View
I want to make a magnetostrictive ultrasonic transducer for homogenizing applications. I also want to make its power supply by myself. I need some references (papers, patents, reports, books...
10 January 2022 2,147 3 View
There are two types of ultrasonic transducers: piezoelectric and magnetostrictive. My question is: Can the same power supply(generator) used for piezoelectric ultrasonic transducers be used for...
09 January 2022 3,674 2 View
I want to find the resonance and anti-resonance frequencies of an ultrasonic transducer by analyzing its impedance. so I need to buy a impedance analyzer or spectrum analyzer or something like...
27 September 2021 8,891 5 View
is it possible to make a DIY impedance analyzer for checking the resonance frequency of high power ultrasonic transducers? for example a face mask welding ultrasonic transducer
15 September 2021 4,080 3 View
I want to test a wire to see is it a pure tungsten wire or not. I guessed I can do it simply by measuring its resistance, but I need to know the value of the specific resistance for 99% tungsten...
22 March 2021 4,213 2 View
I need to design and make a high voltage power supply to use in a lab made electrostatic precipitation with this specs: Input voltage: AC: 220 volt Output voltage: DC: 5-20 KV (Continuous...
10 April 2020 5,384 21 View
Hi, I am working on making an air cleaner, now I need to make a "smoke generator" for my demo device, to show its working principles. it needs to be stable and generate almost uniform and...
07 August 2019 4,291 1 View
What are the advantages and disadvantages of cylindrical electrode configuration comparing to wire-sheet configuration in a electrostatic precipitator(dust electrostatic collector)?
29 July 2019 7,628 0 View
How can I calculate sparking voltage for a cylindrical electrostatic precipitator?
15 July 2019 2,004 3 View
I want to simulate a sono-reactor. Can anyone share a reliable simulation file for simulation of a power ultrasonic transducer and horn in ANSYS or COMSOL with me please?
01 January 1970 2,504 2 View
I am working on the design of an auto-adjustable 25khz 2000W ultrasonic generator(power supply). I will use that to generate the ultrasonic power of a welding system. "auto-adjustable" means that...
01 January 1970 4,196 8 View
