I recently saw a video where someone was making DIY PCBs with what's essentially a miniature cnc shaper, using a lathe bit as the cutter. I can't find it now. Anyone know where I can find the video, or did I dream it up? #pcb #maker #cnc #electronics
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New Post on Dutchiee.tv: 
Sony Bravia Theater Bar 6: Immersive Surround Sound https://www.dutchiee.tv/news/sony-bravia-theater-bar-6-immersive-surround-sound/
#technews #technology #tech #pro #technologynews #gadgets #instatech #smartphone #techie #gadget #apple #mobile #techlover #techupdates #news #engineering #techgadgets #electronics #techgeek #technologies #dutchieetv
New Post on Dutchiee.tv: Kiwi Ears Atheia: Unveiling the Enigma https://www.dutchiee.tv/news/kiwi-ears-atheia-unveiling-the-enigma/
#technews #technology #tech #pro #technologynews #gadgets #instatech #smartphone #techie #gadget #apple #mobile #techlover #techupdates #news #engineering #techgadgets #electronics #techgeek #technologies #dutchieetv
New Post on Dutchiee.tv: Kiwi Ears Airoso: 5 Star Audio Innovation https://www.dutchiee.tv/news/kiwi-ears-airoso-5-star-audio-innovation/
#technews #technology #tech #pro #technologynews #gadgets #instatech #smartphone #techie #gadget #apple #mobile #techlover #techupdates #news #engineering #techgadgets #electronics #techgeek #technologies #dutchieetv
Continued thread
3-input logic gates built from NOT gates and 2-input NAND gates. (The most complex circuits may not be optimal.)
Edit: Replace all the NAND gates with NOR gates to get the same 3-input gates in a different order.
#electronics #nand #nor
Too late to buy that #iphone #tariffs #electronics #economy #maga #trump #democracy #ruleoflaw #government #stocks #apple BTW Tim Apple sold over 100,000 shares of stock on April 1. He apparently does not read #truthSocial
Do I look like I can pay $2.25 per opamp just to make a damn voltage follower?!
No wonder my TV doesn't work. That must have been explosive. Even the screw used to hold it to the heatsink melted a bit.
I did order an exact replacement, but if anyone knows of a MOSFET with similar characteristics as 60R190Q, that doesn't explode, then do let me know.
I've finally finished the electronics for my upcoming exhibition "Moans and Groans" at Notam. The circuit is a custom designed to translate audio to vibrator motor signals. It works as an audio file player as well as a class compliant USB audio interface.
On the 23rd of April I will conduct a haptic audio workshop in Oslo at NOTAM where we play with this technology.
#fieldrecording #electronics #kicad #opensource #foss
More information: https://madskjeldgaard.dk/portfolio/haptic-fields
This week, we chat about mental health, journaling, personal projects, and listener questions.
Take a listen here: https://embedded.fm/episodes/498.
Here's an excerpt from the show:
If the #tariffs stick, microsoldering and board repair is about to become a *highly* valuable skill. Consumer #electronics are going to get a helluva lot more expensive and simultaneously supply will go down, that coupled with an overall recession means people will hold onto their devices longer and choose to get them repaired instead of replaced.
Die Lötspiele mögen beginnen. Ich fühle mich inkompetent. Let's not brick this shit.
3D full-wave #openEMS simulation of the classic experiment in high-speed electronics: where does the return current go? A voltage is suddenly connected (Heaviside step) to a resistor via some wires. An incoming wire and two return wires are connected in parallel. One return path is longer, but runs with the incoming wire side by side, the other wire returns to the source via a straight path. By common sense, radio signals follow the path of least impedance, not resistance, obviously the initial rising edge mostly follows the longer path (until the currents redistribute themselves later reflections occur). #electronics
GIF
I found the capacitor that vented. Glad I didn't vent a battery.
#electronics #maker
Got a few orders delivered before the TradeWarz™ game gets outta hand. #electronics
Got 3 mins? Like #electronics #maker #art #circuitpython #raspberrypi & other cool stuff? Here's a brief 3 min video of students in my "no prior experience" Physical Computing course. First of three projects they'll create in a semester. Their build guides & code linked in desc. youtu.be/u-Jj8-GV404
![In transmission line characterization, one should address such
mismatches by improving the simulation setup via better port
transitions. However, in this simulation, the mismatches are
intentionally introduced to demonstrate openEMS's ability to
accurately model real-world effects.
.. seealso::
The features introduced in this manual are only the tip of the
iceberg, it's not possible to cover all of its aspects here. See
the full manual [12]_ for usage. Here we mention two important
use cases.
**Calibration and de-embedding.** If a port mismatch is unavoidable,
post-processing techniques commonly used in Vector Network Analyzers
can be applied to openEMS simulations as well, such as the SOLT
calibration algorithm, or the newer IEEE P370 de-embedding algorithm.
This involves making additional measurements (simulations) with known
loads or structures at the port, so that the port or the test fixture's
influence can be solved and removed.
**Time-gating.** An alternative possibility is working in the time
domain using the equivalent TDR responses. If we transform the
measured S-parameters into a TDR plot, a time window can be applied
that focuses the response of only the DUT without the early and late
reflections by the ports. This window can then be transformed back
to the frequency domain to "clean" our S-parameters. This is not a
rigorous solution in comparison to applying proper calibration
algorithms, but is a quick-](https://misskey-taube.s3.eu-central-1.wasabisys.com/files/d38b9413-db43-4cb1-b631-0eb83ed8c09b.webp "In transmission line characterization, one should address such
mismatches by improving the simulation setup via better port
transitions. However, in this simulation, the mismatches are
intentionally introduced to demonstrate openEMS's ability to
accurately model real-world effects.
.. seealso::
The features introduced in this manual are only the tip of the
iceberg, it's not possible to cover all of its aspects here. See
the full manual [12]_ for usage. Here we mention two important
use cases.
**Calibration and de-embedding.** If a port mismatch is unavoidable,
post-processing techniques commonly used in Vector Network Analyzers
can be applied to openEMS simulations as well, such as the SOLT
calibration algorithm, or the newer IEEE P370 de-embedding algorithm.
This involves making additional measurements (simulations) with known
loads or structures at the port, so that the port or the test fixture's
influence can be solved and removed.
**Time-gating.** An alternative possibility is working in the time
domain using the equivalent TDR responses. If we transform the
measured S-parameters into a TDR plot, a time window can be applied
that focuses the response of only the DUT without the early and late
reflections by the ports. This window can then be transformed back
to the frequency domain to \"clean\" our S-parameters. This is not a
rigorous solution in comparison to applying proper calibration
algorithms, but is a quick-")
I built a latency meter with an Arduino and a photo transistor to answer one question: Is click-to-photon latency higher on Wayland than on X11?
And the answer is: Yes, actually.
42 ms on X11, compositing off 56 ms on X11, compositing on 64 ms on Wayland 71 ms on Windows 10
Tested with Plasma 6.3.4 and Firefox 137. I will improve my methods and confirm these numbers. See replies for details.