Adrian Studer

@adistuder@mstdn.social
214 Followers
165 Following
436 Posts
Rusty coder tinkering in #electronics. 64KB ought to be enough for my 16bit brain.
Githubhttps://github.com/astuder
2nd Bedroomhttps://wegmatt.com
Show threadAdrian StuderAug 25
Technical background: The modem is from Nokia and the standard is called G.fast:
https://en.wikipedia.org/wiki/G.fast
https://www.nokia.com/fixed-networks/gfast-cpe/
My frequency of interest is at 162MHz, so that explains the increased noise I'm seeing.
Adrian StuderAug 24
Low noise floor or 1G fiber? Choose wisely!
TIL that my “fiber terminated into plain old telephone wiring” internet connection is responsible for about 8dB of wideband noise.
First plot shows the effect of unplugging the ONT modem, second plot when the internet connection is reestablished. #sdr #hamradio
Adrian StuderAug 2
Unnamed RE Podcast Aug 2
New episode is up!
We talked with Nathan Emerick about the Spotify CarThing and it's journey to becoming the DeskThing :D
https://unnamedre.com/episode/75
075 - Teleporting All Over The Timeline

An Interview with Nathan Emerick

Show threadAdrian StuderJul 21
And of course the jumpers stay set the same way 95% of the time as the simple option (Si5351) just works, unlike the complicated option from the Analog datasheet (VCOs) 🙃
Adrian StuderJul 21
I love the "everything but the kitchen sink" approach to prototyping, but man did soldering all those jumpers suck. 😅
Adrian StuderJul 14
JanaJul 14
Adding a UART RX/TX remap option, just in case.. :D #electronics
Adrian StuderJul 13
The feeling when bring up of a complex chip works on first try..
Adrian StuderJul 8
Craig BishopJul 8

Well… that’s not quite as transparent as I was hoping for. It looks like the transparent coverlay lamination created ripples all over.

This flex is also a great illustration of warpage! The bottom has copper traces across almost the full width. The significant CTE difference from the PET means that side bends up enough I have to hold it for a photo. Trace density impacts warpage, it’s just easier to see on this thin flex PCB.

Adrian StuderJul 7
Rick AltherrJul 7
That person that reverse engineered the Microchip CLB? He did a whole project using the CLBs to create a time-to-digital converter: https://docs.google.com/document/d/e/2PACX-1vQA89V9lAonxGPTtCKu4LObzSHyTk-gakk_lph7WlV8y94fRNXltXDVaNxafzX_sYIuslnAerhjTfH0/pub
Time to Digital Converter: Measuring Nanoseconds

Show threadAdrian StuderJul 3
Paint job completed. I use Elmer’s glue as binder as it is whiteish translucent when dry. Acrylic paint is recommended, but this way stripping the paint for future rework is easy by putting the board into an ultrasonic cleaner for a few minutes.
The thermochromic pigment is opaque red at room temperature and turns transparent when heated, showing the color of the binder.