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#electricalengineering

2 posts2 participants0 posts today
Public
Harvey Sandstrom

Something I have never understood: What is the point of having an IP67 tactile switch, when there's no way to seal against a panel, and therefore the terminals can just get wet and likely short the switch? It only ensures it will work again once the board dries out??? #electronics #ElectricalEngineering #buttons #PhysicalUserInterfaces sameskydevices.com/blog/tactil

Same Sky · Tactile Switches Explained: Selection, Design Tips, and How They Work | Same SkyWhat are Tactile Switches? A “tactile switch” is a widely used switch that completes an electrical circuit when pressure is applied to the device by the user, which then gives the user a perceptible “click” or haptic bump in response, indicating current flow....
Public
Harvey Sandstrom

My mid-level analog #electricalengineering skills have always been a bit shit. It took me a while to dig up the "proper" way to be able to duty-cycle a voltage divider so that it doesn't (constantly) contribute to quiescent current when monitoring a battery. It's not terribly hard to find a combination n-fet and p-fet in one package to reduce the footprint. If you know of something even simpler I'd love to see it. electronics.stackexchange.com/

Electrical Engineering Stack ExchangeESP32 and P-MOSFET controlled voltage dividerI have a stupid Nubie question that I am hoping someone might be able to answer. I am wiring an ESP32 with a P-MOSFET for a high level switch to get the voltage of the battery that is powering the...
Continued thread
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Queen Calyo Delphi

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
#electronics#electricalengineering
Continued thread
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Queen Calyo Delphi

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 😤

#electronics#electricalengineering
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Queen Calyo Delphi

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?

#electronics#electricalengineering
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Captain_Faraday :fedora:

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.

#Introduction#NewHere#ElectricalEngineering
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Captain_Faraday (I've moved!)

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.

#Introduction#NewHere#ElectricalEngineering
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Harvey Sandstrom

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.
#electronics#electricalengineering
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