Seeking Someone to Do a Ferrites Project

i have being using ferrite bead in my protoyping board sort of trial and error or best practice way and never attempted to understand its essential. definitely looking forward to an essentials article from E14. Having said that, the design kit contains various types of high current and high frequency EMI suppressing ferrite beads. Although i not sure how to deal and test with EMI, if i were to play with the ferrite beads, it would be in power supply related circuit. I would like to measure, visualize and hopefully understand the impedance change over frequency as per its theoritical charateristic. While i don't have a $30k impedance analyzer to play with, there exist low cost AD5933 based impedance analyzer module with controller board on site such as Taobao (https://www.taobao.com/list/item/673727667622.htm?spm=a21wu.10013406.taglist-content.4.38d420ae87uow2) . we can use a microcontroller / pc based I2C control to command the module to perform impedance analysis over a dc to dc converter. we can get various cheap dc-dc up converter (which has high frequency) from taobao, such as ADP5070 based module https://item.taobao.com/item.htm?spm=a230r.1.14.71.5e787b9094h5mC&id=587411536412&ns=1&abbucket=7#detail , and replace the ferrite beads on the board (they are SMD) and perform the impedance sweep over frequency. While this experiment is not geared towards circuit design, it seems highly doable on a tight budget of less than $100 and 3 weeks work

Hi Weiwei,

Nice find. I think that would work very well. The frequency range is limited, but in that range I think it would be awesome. I've wanted to build one using the AD chip for ages, but other things get in the way. Something ready-made like that sounds really neat.

I'd love for a Tiny SA ultra to find its way into my Christmas stocking LOL

https://tinysa.org/wiki/pmwiki.php?n=TinySA4.Specification 

Amazing what a low price that is, for that performance : ) 

I have an ancient HP8558B (cost about £500 (830 CAD) from Ebay about 8 years ago, which I really need to throw away it's not very usable. (It has sat in the shed for years as a result - and no point re-selling it, it's not a very nice thing to do to anyone!). It's performance is awful compared to that TinySA ultra, but there was not much of an option at that time.

I have that impedance analyser chip lying around for 5 years now. I didn't get time to work on it. It's a long pending project. It has quite interesting applications such as electrochemical sensors. 

Seems like a good project for a some suitable project 14 contest!

This one's an interesting device! There are spectrum analyser PCBs versions (without display) available on banggood and maybe on AliExpress too! I guess they will be a cheaper alternative to the integrated display ones. 

Hi! 

Yes, it's a realm where a DIY project is really worthwhile, since the commercial offerings are $$$$ (or $$$$$). 

Hi! 

Yes, it's a realm where a DIY project is really worthwhile, since the commercial offerings are $$$$ (or $$$$$).