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#electricalengineering

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Alrighty, I need to post an RFC to the #electronics and #electricalengineering fedi mind hive:

I am searching for a method to inject a clock signal (f≤1Hz) into a power supply by swapping the +V/0V rails back and forth.

Requirements:
- Able to operate at up to +12V
- Single-rail supply
- Min. TDP: 1W

Update:

I figured out a solution based around cheap parts that will be more than adequate! Thanks for the feedback! 😄

'Utilization of Filters and Other Methods for Harmonic Distortion Mitigation in Electricity Networks Tied to Renewable Energy Sources: A Review' - a recent article in the Nigerian Journal of #TropicalEngineering on #ScienceOpen:

🔗 scienceopen.com/hosted-documen

ScienceOpen<b>UTILIZATION OF FILTERS AND OTHER METHODS FOR HARMONIC DISTORTION MITIGATION IN ELECTRICITY NETWORKS TIED TO RENEWABLE ENERGY SOURCES: A REVIEW </b><p xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" class="first" dir="auto" id="d204129e121">Harmonics in electrical power systems can be likened to virus in biological systems. They cause all manner of disturbances including damages to electrical appliances and utility equipment. It is unfortunate that harmonics cannot be totally eradicated from electrical networks. This suggests that they are inescapable but can be efficiently minimized. In circumstances when they are removed or decreased, if proper care is not provided, they may reappear. Because of the challenges connected with old energy sources, such as carbon emissions and other forms of pollution, world economies are shifting to greener and cleaner forms of energy known as renewable energy sources (RESs). RES in standalone or grid connected mode is also a major source of power quality problems such as harmonics. To overcome harmonic issues, passive filtering techniques were initially used. Then, due to the limitations of passive filters, active filtering techniques were used before the more recent use of hybrid harmonic active filtering strategies. Aside from the use of filters, several methods have been used to address harmonic-related difficulties. In this research, harmonic mitigation attempts in the last twenty-seven years are surveyed. The primary purpose is to demonstrate the strength and limitations of each strategy. This will help with their selection and application in specific scenarios for harmonic reduction. </p>
Continued thread

Update!

@MeiLin gave me the search engine shibboleth I needed to find this web page with a lovely and clever transistor circuit that I can try out!

It's even simple enough for me to try to breadboard it!

dos4ever.com/ring/ring.html

Edit:
... Oh wait this emulated schockley diode circuit requires obscene voltages in order to exceed the avalanche breakdown Vec. I uh... can't use that. I'll need to find other solutions. :x

www.dos4ever.comRing Counter Variations
Continued thread

This circuit would be so much easier to implement if I would just let myself use J/K flip-flops, but:

1. the only cheap ones available are duals in 16-pin packages when I only need one per ring node and each ring node is an independent pcb, and

2. I very explicitly decided that the light at each node MUST be surrounded by a curious cloud of discrete components for the sake of art 😤

Oh gods, I'm gonna have to find resources to study up about resistor-transistor, diode-transistor, and transistor-transistor logic, if I want to be able to implement the round-robin circuit for the Horologium Keplerus using discrete transistors. >.>;;

I guess RFC for links to resources if anybody has useful links that can cut through the less than optimal search engine algorithms that almost only return SEO'd blogs that have no meaningful information?

I am *very* temptedly considering something extremely cursed:

Abusing an "ultra thin" ethernet cable to bring +12V+GND to a control box that needs only a few mA max, and 3x 5V differential signals back out to the thing being controlled.

"ultra thin" ethernet cables typically use 30AWG conductors which have a max power transmission ampacity of ~142mA, way more than enough to power the control box.

I'm pretty certain the insulation inside can handle 12V. 🤔

Hey everyone! I've made the jump from Mastodon.Social and wanted to introduce myself. I'm an electrical engineer living in the southeastern USA.

You'll find me tooting about Linux, FOSS, Python, and scripting. When I'm not on the keyboard, I'm into photography, hiking, and enjoying nature with my spouse.

Also, I have two black cats that pay rent with their winning personalities and love. lol :rickdance:

Looking forward to connecting in this community! Don't hesitate to say hello.

*takes a BIG hit of the Magic Blue Smoke Hookah* It's all just the field, maaaaaaan. ⚡🌿

Our arcane constructs, twisting, branching paths of metal and semi-metal, manipulate the electromagnetic field into the useful shapes we want it to take.

And electrons being the mobile charged particles they are simply react to that field, and the ways they react to that field are the effects that we observe.

It's allll just the field~ ⚡🌿

Hello Fediverse! 👋

I'm an electrical engineer living in the southeastern USA.

You'll find me tooting about Linux, FOSS, Python, and scripting. When I'm not on the keyboard, I'm into photography, hiking, and enjoying nature with my spouse.

Also, I have two black cats that pay rent with their winning personalities and love. lol

Looking forward to connecting! Don't hesitate to say hello.

Well, be careful what you wish for I guess. I asked TI Webbench for an ultra efficient 3v3 buck converter and it recommended an inductor that is 13mm x 13mm and a FULL CENTIMETER TALL. Chonky doesn't even describe this thing, it's paperweight all by itself. They don't specify weight but its a cubic centimeter of copper and ferrite, so I'm guessing it's heavy AF.

😲 😳 😣

digikey.com/en/products/detail

DigiKey ElectronicsHC1-100-R | DigiKey ElectronicsOrder today, ships today. HC1-100-R – 10 µH Unshielded Drum Core, Wirewound Inductor 12.79 A 5.7mOhm Max Nonstandard from Eaton - Electronics Division. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
Replied in thread

@jalefkowit

It's an interesting point you highlight because I've never thought of things through that paradigm. Now that I see it, I realise I'm hoping to transition to #openBSD because I believe of mainstream operating systems, it probably has the best #DX.

In this particular case, I believe that the developers exploit that in order to optimise for what might be called #security which impresses me.

I realise it's probably an outlier in this regard!