Blog - All Comments

RE: Smart Coin Sorter by Inductive Sensing. #03 Experimenting with Op Amp Colpitts Oscillators

dougw — Sat, 22 Oct 2022 17:49:30 GMT

Good work. Those OP27's are great for low noise.

RE: Experimenting with Magnetic Components - DIY Inductance Meter

Jan Cumps — Thu, 31 Mar 2022 11:04:42 GMT

Another option if you don't have an LCR or L meter, from EEVBlog.
Use the capacty mode of your DMM:

[View:https://www.youtube.com/watch?v=UrS5ezesA9s:640:360]

RE: Experimenting with Magnetic Components #2: Low Power Buck Converter for IoT Home Automation

Frood — Tue, 29 Mar 2022 14:04:05 GMT

Hello I have question about acoustic noise of power inductor. Do you have problem like this ?

If so , how could you solve this ?

RE: Experimenting with Magnetic Components #1: EMC/EMI Filter Design with Common-Mode Chokes

LSB — Fri, 04 Feb 2022 21:43:28 GMT

Great, thank you

RE: Winners Announcement for the Experimenting with Magnetic Components Challenge

dougw — Mon, 31 Jan 2022 15:09:58 GMT

Congratulations to the winners and participants. I am still discovering areas I overlooked on the new site.

RE: Winners Announcement for the Experimenting with Magnetic Components Challenge

taifur — Sun, 26 Dec 2021 18:08:51 GMT

When the finisher prize will be shipped?

RE: Winners Announcement for the Experimenting with Magnetic Components Challenge

Jan Cumps — Sat, 18 Dec 2021 16:21:14 GMT

My prize arrived:

Thank you!

RE: Cable Signal amplifier and splitter: a peek inside

shabaz — Thu, 09 Dec 2021 00:58:51 GMT

So glad that in 50-ohm world at least (guessing cable TV is 75 ohm, I don't know much about it), things are simplified these days with (admittedly more expensive) ready-matched MMIC parts, it's a far longer procedure to have to impedance-match and then tweak each inductor since they might not fall onto popular values! (Sure simulation software can do it but perhaps only the larger orgs would use that, and besides these boxes were probably designed a decade or more ago - at one place I worked at, it was all manually done by their RF expert, sitting in front of VNA all day). Still, I guess once it's done then millions of these cable-TV amplifiers can be churned out cheaply.

RE: Winners Announcement for the Experimenting with Magnetic Components Challenge

Jan Cumps — Tue, 07 Dec 2021 20:33:52 GMT

Yay!

This is the 3rd design challenge I've participated in. The previous ones were long ago: "Internet of Holiday Lights" and "Enchanted Objects".
Those two times, I didn't make it to the finalists, but I enjoyed those a lot too. A challenge is a great way to interact with the other players.

As a thank you for the readers, organisers, fellow challengers and jury, I opened an RF device full of magnetics and posted photos: Cable Signal amplifier and splitter: a peek inside

RE: Cable Signal amplifier and splitter: a peek inside

Jan Cumps — Tue, 07 Dec 2021 20:21:09 GMT

Transistors seem to be:

BFG540 N37 (120 mA, 20 V, 9 MHz)

BFG520 N36 (70 mA, 20 V, 9 MHz)

Both NPN NXP, UHF / Satellite-TV use.

RE: Winners Announcement for the Experimenting with Magnetic Components Challenge

shabaz — Sun, 05 Dec 2021 15:27:43 GMT

Congrats Jan and Enrique! Also, awesome to see so many contestants' great work in so many different topics that won the finisher prizes too.

RE: Winners Announcement for the Experimenting with Magnetic Components Challenge

genebren — Sat, 04 Dec 2021 17:43:44 GMT

Congratulations to the winners and finishers in this contest. I was completely amazed by the amount of great content that Jan generated in his entry for this contest. Clearly above and beyond expectations and very deserving of the Grand Prize.

RE: Winners Announcement for the Experimenting with Magnetic Components Challenge

javagoza — Sat, 04 Dec 2021 11:09:54 GMT

Congratulations to the grand prize winner, Jan, for his inspiring and varied experiments with magnetic components. It's been great to have Jan as a challenge partner. He has been helping others, giving advice, providing ideas, reading all the blogs, ultimately making this challenge a group work. A well deserved award.

Thank you judges for your laborious task of going through all those blog posts and the difficult task of just picking two winners.

Congratulations to all the participants of this Design Challenge. I really enjoyed reading and learning from all the published blogs.
It has been a great learning experience. I have tried to replicate many of the experiments, to the best of my ability, and have been able to fully understand all the effort behind them.
Maybe I would have had to blog about all those attempts of mine to replicate the experiments of the other challengers too, I'm writing it down as an idea for the next challenge, I'm already looking forward to it :)

And finally, a special thanks to Randall who encouraged me to participate in the challenge despite my doubts due to my lack of knowledge on the subject. I encourage anyone to participate in the next challenges, it is a unique experience and opportunity to learn.

RE: Winners Announcement for the Experimenting with Magnetic Components Challenge

navadeepganeshu — Sat, 04 Dec 2021 10:40:50 GMT

Congratulations to all!!! It was great being a part of :)

RE: Winners Announcement for the Experimenting with Magnetic Components Challenge

robogary — Sat, 04 Dec 2021 01:29:59 GMT

nice job folks, one and all !