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Anonymous10/18/25, 10:07No.2951482/ohm/ - Electronics General: Hand-wound toroid edition
Thread suffered metal fatigue: >>2939202
>I'm new to electronics. Where to get started?
It is an art/science of applying principles to requirements.
Find problem, learn principles, design and verify solution, build, test, post results, repeat.
Read the datasheet.
>OP source:
https://github.com/74HC14/ohmOP
bake at page 10, post in old thread
>Comprehensive list of electronics resources:
https://github.com/kitspace/awesome-electronics
>Project ideas:
https://hackaday.io
https://instructables.com/tag/type-id/category-technology/
https://adafruit.com
https://makezine.com/category/electronics/
>Books:
https://libgen.is/
>Principles (by increasing skill level):
Mims III, Getting Started in Electronics
Geier, How to Diagnose & Fix Everything Electronic
Kybett & Boysen, All New Electronics Self-Teaching Guide
Scherz & Monk, Practical Electronics for Inventors
Horowitz and Hill, The Art of Electronics
>Recommended software tools:
KiCAD 6+
Circuitmaker
Logisim Evolution
>Recommended Components/equipment:
Octopart
LCSC
eBay/AliExpress sellers, for component assortments/sample kits (caveat emptor)
Local independent electronics distributors
ladyada.net/library/procure/hobbyist.html
>Most relevant YouTube channels:
EEVblog
W2AEW
Moritz Klein
>microcontroller specific problems?
>>>/diy/mcg [//boards.4chan.org/diy/catalog#s=mcg]
>I have junk, what do?
Shitcan it
>consumer product support or PC building?
>>>/g/ [//boards.4chan.org/g/]
>household/premises wiring?
More rules-driven than engineering, try /qtddtot/ or sparky general first
>antigravity and/or overunity?
Go away
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Replies
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Anon10/18/25, 10:10No.2951484
Actual old thread: [/diy/thread/2945584#p2945584]
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Anon10/18/25, 12:12No.2951491
Once you start winding your own, its like a point of no return.
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Anon10/18/25, 12:49No.2951494
https://electronicprojectsforfun.wordpress.com/rf-module-gallery/the-rf-splitter-and-combiner-gallery/a-resistive-tap-attenuator-for-rf-measurements/why is this called a 40 db attenuator? isn't this just a resistor divider that reduces the input signal by 0.0199 (2460 ohms in series with 50 ohms) which is close to 20 db attenuation?
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Anon10/18/25, 13:30No.2951499
Calling out the phaseGODS in here
See pic. Top read is clock, bottom is same clock present in audio output. Need to substract such clock from signal, how the fuck do i turn that square into whatever wave is that in bottom so i can phase cancel it and effectively substract it from output?
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Anon10/18/25, 14:19No.2951511
>have couple year old laptop with DC jack
>charger shits the bed one day
>Want to change it to usbc using a trigger board so it's not my only device with a bespoke charger anymore
>Cut off the jack from the charger, hook it to a bench psu and insert it
>Works
>Run 2 bodge wires (pins and body of jack are all on the ground plane aside from the positive) and test with bench psu
>Doesn't work
>After a few minutes of fiddle fucking plug the jack pigtail in with no power hooked to it
>Immediately starts accepting a charge (external power still hooked to bodge wires)
>The fuck
>Turns out the last little bit where it feels like the jack snaps in is what does it
Why would being hooked directly to the pins on the back of the jack which should bypass anything like that not work? I've confirmed that all parts of the jack other than the positive are all connected to the ground plane and do indeed show voltage when hooked up and measured, so I don't understand why some internal mechanism would still be able to interfere or what that mechanism might even be.
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Anon10/18/25, 16:49No.2951531
https://yageogroup.com/products/Capacitors/part/C2220C511KCGAC%7BBULK%7Dwhat do "current" and "voltage" mean here? as an example, at 10 MHz it shows 1.85A and 57.87V. is this some sort of a derating curve, and so at 10 MHz the absolute maximums are 1.85A and 57.87V? or is something completely different?(i'm trying to understand how to select capacitors in a resonant circuit, so voltage and current limits are very important.)
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Anon10/18/25, 20:14No.2951583
From end of last thread I wrote:Would hotswapping a DAC while power is still connected via the microcontroller (3.3v) be enough to kill its internal reference voltage? I think I did that...Vref is suddenly 0 and can't get it working again :(someone asked "what DAC"...it's an AD5668.