#capacitors — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #capacitors, aggregated by home.social.
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Capacitors | Electronics #4
In this video we will cover capacitors - what are they, what do they do and where do you use them.
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Nerdy gunsmithing
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Hey #electronics .
Can I merge decoupling #capacitors ?
Pictured: 3 1µF caps in parallel.
One for VCC
One for AVCC
One is a filter for the power supplyIt feels like they are all doing the same job and occupying space for no reason. What am I doing wrong?
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🔌🤖 Oh great, another #podcast about #circuits, because clearly what the world needs is more talk about #resistors and capacitors! 🎧 Meanwhile, Michał Zalewski, aka lcamtuf, is apparently so #electrifying that you'll need a surge protector just to handle his #insights. ⚡✨
https://theamphour.com/725-the-secret-life-of-circuits-with-lcamtuf-michal-zalewski/ #technology #capacitors #HackerNews #ngated -
Ceramic capacitor voltage sensitivity.
I looked up a Samsung 1206 22uF 25V X5R capacitor on their website.
Huge variation in capacitance against voltage. At the rated voltage the capacitance goes down by 90%.
Way more than I ever imagined! Would make a good VCO!
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How #chemists turned #bourbon waste into #supercapacitors
Hydrothermal carbonization can directly convert #stillage into hard or #ActivatedCarbon. Cossio & Guzman used activated carbon as #electrodes, creating double-layer #capacitors by putting liquid electrolyte between them. Proof-of-concept devices were able to store as much as 48W/kg. Built a hybrid device, with one activated carbon electrode and one hard carbon electrode, stored as much as 25 times the energy per kg
https://arstechnica.com/science/2026/03/how-chemists-turned-bourbon-waste-into-super-capacitors/ -
New video! Recapping the Amiga 3000T power supply.
YouTube: https://youtu.be/uKZePkkBd9g
PeerTube: https://makertube.net/w/rSCTC3Ddwsij2vukLprWe1#Amiga #Amiga3000T #Amiga3000 #A3000T #Commodore #Restoration #PSU #PowerSupply #Recapping #Capacitors #Replacement #RetroComputing #VintageComputing #RareCommodore
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Merry Christmas everyone! 🎄
I can finally check that this old Frako is just fine!
#capacitors -
A very informative video on the improvement of sound quality of (professional) audio equipment with capacitors.
This knowledge can also be used in improving the tone of my Bass Guitar which suffers from a 3-6dB loss of signal on the third string (D string)
#music #capacitors #electronics #audio #interfaces #PA #pedals #bass #Joyo #passive #active #circuit
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There have a vertical linearity issue on this CRT I picked up last weekend. It's a Magnavox "Computer Monitor 80" with no model # on the case anywhere, but I believe it's a Philips BM7500-series, or so.
(See the bottom 3-4 lines of text vs the rest of the text on screen - vertically squished.)
Here is the service manual as close as could be found,
https://archive.org/details/PhilipsBM75xxServiceManual/mode/2up
Can anyone tell from the schematic if there is a V.LIN pot on the board somewhere that I would find upon opening the unit? I'd like to get it adjusted and use it.
If it's a caps issue, I wonder how many would need to be replaced to get it back to snuff? This display was manufactured in late 1986.
#CRT #monitors #repair #AppleII #vintagecomputing #retrocomputing #fix #servicemanual #Magnavox #display #glitch #capacitors #repair #help #techhelp #TV
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I'm designing a small circuit board which will have an STM32 microcontroller.
One document from STMicro says that the part must have two capacitors to filter the power supply, a 'ceramic' cap at 100nF, and a 'chemical' cap at 4.7uF.
Another document says they should both be ceramic caps, and the Nucleo64 evaluation board (sold by STMicro) uses ceramic caps for both.
Should I bother using a different cap for the larger value? If so, what qualifies as a 'chemical' capacitor, just electrolytics?
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The #powersupply seems dead. I have other two, so I tried them. One was dead (as written, in italian, on the label), and one turned on the computer but no "bong" from the speaker. And the fan seemed a little more noisy than I remembered, so I checked the voltages and... holy cow 20v! I immediately disconnected it, hope not to have caused further damage. There was no #magicsmoke, only some fishy smell typical of the #capacitors #electrolyte. Not surprising, considered they have leaked. -
I've done my homework! 💪
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This period was a nightmare for technical persons building computers. At that point in time I was building computers with a frequency of about 6 to 12 per day. The operating systems were put in afterwards.
Imagine the following nightmare scenario; at the certain point in time within the period of guarantee client calls with the message that the computer just stops working. The client has done everything that's needed to protect it; UPS, grounded outlets, ground resistance between .5 ohms and 1.2 ohms
Good UPS APC were good ones at that point in time.Computers come in and after a while it's easy to see what happened because all the Elco's were dead, all of them!
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The massive capacitor failure of 2K2
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The capacitor plague of the early 2000s.
The Asianometry YouTube channel picks apart the story about this painful time. I had equipment fail because of this .
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Synth DIY component basics: capacitors
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I read this headline, and the first thing I thought was "oh hey, I wonder what old radios they recapped and fixed! I would watch that! They have awards for that, though? 🤔 "
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Finished #soldering. What I learned so far: l should clean between soldering #SMD components and #throughhole ones. I should leave enough space between the SMD components. I also dislike 0806 #resistors, better get some in 1206 size. The #capacitors were okay.
I tried it out with a square and a triangle wave as two inputs, connected through #potentiometers on a mini #breadboard and looked at the #oscilloscope
#diyelectronics #electronics #diysynth -
2/ This is why I have never been a fan of Linux, people should be writing their own OSs 😜
As an aside, I found this #USENET thread with some familiar names from 1987 about porting Minix to the Atari - I assume that would have been the ST then.
https://www.linux.co.cr/unix-source-code/review/1987/0108.html
#DEC #Digital #PDP11 #LSI11 #Minix #Linux #OperatingSystems #Decent #Capacitors #USENET #Atari #AtariST #RetroComputing
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1/ Just because, here's my LSI-11 desktop - It works, they used much better capacitors in those days.
Way back when, the LSI-11 was often used to teach people Operating Systems and Compiler Design, and in my CS degree in 1986 we'd fiddle with MINIX on these things, and deal with re-writing different low-level UNIX things. Life was much easier with only 50 instructions to work with.
#DEC #Digital #PDP11 #LSI11 #Minix #Linux #OperatingSystems #Capacitors #USENET #Atari #AtariST #RetroComputing
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⚡Proper decoupling practices, and why you should leave 100nF behind
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Safety advisory: Always discharge your capacitors. Especially for some breadboard testing.
Ask me how I know.
Ouch.
#electronics #diy #breadboard #hobby #circuits #capacitors #dc
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Of tens or maybe even around hundred Raspberry Pis that I repaired and saved from #ewaste - today I met the first one with a shorted capacitor.
My first ever shorted cap.
WOW.
#electronics #electronicsrepair #raspberrypi #ifixit #repair #capacitors
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turns out this awesome little 65W #charger doesn't handle 400+ volts very well. no over-"provisioned" #capacitors here?