Looking through the comments. Random engineers on Lemmy MacGyvering the most insane adapter on the spot made my day
I have done something similar. We were going to play Wii one night but my friend brought the wrong adapter.
As the old saying goes: “Copper is copper!”
But he used a paper clip, that is steel.
Resistance depends on material and length, steel is fine for that short distance
Incidentally Earth can carry a lot of current since though it has high resistivity, the conductor is about 18,000km across
I was thinking about the cables themselves but, you’re right about the McGuyvered adapter!
Wonder if it gets hot over time. 🤔
…I really don’t know electronics and want to pick it up soon haha.
Wrong API? Wrapper pattern time!
Twelve audiophiles around the world just had seizures
That’s the joke. They would claim that … I don’t know… electrons are going to fall off that copper wire or something like that.
they’d be mad about the lack of shielding, which COULD result in noise from interference. it won’t, but audiophiles love ignoring real-world measurements in favor of theoretical ones.
source: i am an audiophile, but one of the “spend money on gear, not cables” kind
Audio goes over balanced cables, as long as they’re close together they should receive equal and opposite interference, so interference is cancelled out
– Ham radio licensee
Man, if that isn’t the experience when visiting any niche online community around anything hahaha.
There’s a dozen of us! Exactly a dozen!
Hey, at least it’s copper instead of aluminum.
I mean, if it makes good contact and is not moving it is not going to affect audio quality any more than an equivalent length of extra cable would’ve
Once someone tried to tell me that the wrong cable impedance to the speakers affected sound. Asked him what is the wavelength at audio frequencies, conversation died.
If they were passive speakers being powered through the cables and an amplifier wouldn’t the additional impedance of the cable result in a (probably imperceptible) reduction on volume? I agree it wouldn’t effect the waveform, and thus, the quality of the sound though.
Yeah, if the cable impedance is small enough that you can still get the volume you need it doesn’t matter
The comment above is informed by radio electronics - in 1980s Australia had TV on low enough frequency that we used balanced wires (two parallel conductors, like speaker wires) for best interference rejection, with opposite voltage in each conductor and interfering signal will affect both conductor equally and opposite, cancelling the interfering signal (we also needed a “balun” on the antenna to match between the balanced wires and the unbalanced antenna)
Now every antenna you see on roofs and wifi devices connect with coax cables and connectors which are impedance matched to the antennas because impedance really really matters at microwave frequencies, those cables need shielding as they can’t reject interference in the way balanced cables can
Resistance can reduce the volume. E.g. if your wires are too thin for the current you want to send over them. The guy was talking about impedance.
Impedence is the combination of resistance (ordinary resistance to current) and reactance which is resistance specific to alternating current which comes from the capacitors and coils in the equipment. Even a squiggly circuit trace can create reactance. So, impedence is resistance.
Whatch this short for a clear explanation:
https://youtube.com/shorts/tanon58nW1o
From what I’ve read, and from talking to a guy who own a music studio near me, impedance mismatch is a real thing in audio equipment. At best, it’ll lower the sound level causing you to have to crank up the volume, which just puts more strain on your equipment. Worse, it can cause crackling from waveform peaking. At the very worst, it can damage equipment.
Brushing it off just because the guy doesn’t know the wavelength of audio signals is a dick move. No wonder he stopped talking to you. I bet you, yourself, know a lot of things, a lot of true things, that you can’t explain to the utmost detail.
“You say quarks are combined with the strong force to make protons, huh? Well, what’s the binding force between an up and down quark? Oh, you don’t know? Curious.”
Impedance mismatch between two pieces of equipment (amplifier and speaker, in this case) is a thing, and depending on how the amplifier is built can be a problem. But for the piece of wire connecting them to behave like a transmission line it needs to be a significant fraction of the wavelength of the signal, which at audio frequency is quite a lot, so unless you have your amplifier on the other side of town it is totally irrelevant. The guy was blabbing nonsense. We didn’t talk about quarks.
Tv started acting up today, found a bulged cap on the main board, it’s a trough hole, the only one I find to match is a surface mount. I used some resistor legs to poke through the TV board and soldered the surface mount cap to the poking legs. TV is back to life ! Yay !
You’re.a.wizard.harry.meme
I can’t believe this picture of the “adapter” I made 15 years ago is finally relevant. Think I was just missing a cable extender so made one myself
No offense, but the quotation marks are on the wrong part lol. Yes, I’m judging your younger self for that extremely blurry “picture”. EDIT: It’s a joke, people…
Have an upvote, mate, I thought the exact same thing.
So did I.
I’m no audiophile, but wouldn’t that plug fit into the port right next to it?
Headphone jack is an output. The jack they’ve hotwired is an input.
Me:
Before the mid-to-late 1990s, on the other hand…
Connecting cables was easy, the nightmare was getting the OS to recognise the devices.
You better hold onto those driver discs.
Yes, but there were so many different cable standards that you weren’t always sure you had the right one on hand. USB has been such a godsend that the young’ns will never fully appreciate.
That’s what the Cable Box™ was for. The only time a self respecting cable collector would not have the right cable was the week after getting rid of some of the most “legacy” cables.
Love Grafo.
It’s hard to tell with the wire covering part of the label.
You can see enough to tell it’s an I (in), not an O (out) - plus the fact there’s only room for one more letter behind the copper, as demonstrated by the hidden P in “TAPE” above. Having dealt with this sort of equipment enough in my life, those were really the only two possibilities.
It’s hard to see behind the copper but I’m pretty sure that is “Tape in”, an input, while the headphones next to it would be an output
Others have already pointed out this is the tape in and that’s the headphone jack. To the left is an effects send and return which is after the preamp but before the power amp (it’s an in and an out where you’d plug in certain effects pedals). Far to the left is the instrument input. Depending on the specific signal you could probably route it through the effects return which bypasses the distortion of the preamp. I’d have to see exactly what the fuck they thought they were trying to accomplish.
The color of it makes me think of the old Peavey Rage 158 amps but they didn’t have an effects loop or tape in. So I’m not exactly sure which amp this is. The far right knob is the master volume and the one left of the effects loop is reverb. That’s not important but it’s interesting to me.
Not audio, but I needed to power some fans with a 12V DC adapter
Hah, I have done this before. PC fans are nice for random projects since they are square, have mounting equipment, and use an extremely common DC voltage. Mine has a little molex snake in the middle though. ;p
I don’t know why, but I laughed quite hard at this. Try putting “…mine has a little molex snake in the middle…” in any other context. XD
On a more serious note, “yes” to everything you said. I “mounted” them to a repurposed bathroom rack. :)
I removed the 3.3v from my sata cables last night and threw an “I told you I can figure shit out on my own as a man” up at my dead electrician father. That’ll show him to not teach me to be proud of myself…
Also, help me. Fractal Node (fits 10). Proxmox. TrueNas. 1 zfs2 VDEV using 5 of 8 SAS HBA
Adding 2nd swath of 5. Using remaining 3 SAS HBA and they’re working, the 3.3v fix worked including one disk on a chain with the original swath that didn’t require the fix.
The 2 remaining new disks have no SAS slots to use, so using SATA but proxmox won’t detect them to even setup the pass through.
Tested cables, disks, slots, etc. Enabled spin up on all sata in bios. Nada. Feels like a software or bus issue but I’m not technical. Need an adult
Supermicro X10sl7-f
Probably wanna make a separate post for this. I’m sure someone knows, but they won’t be able to see it buried in the comments of a meme.
I kinda want to not repost and test the venn diagram theory in my head about this post’s audience. But you’re obviously correct 100%
I am confused, why you mess with the voltage of sata cables?
… Wouldn’t there be enough electrical power in this that you might wanna cover that in electrical tape?
I’ve not jerry rigged an amp before, but I did once build a ramshackle ‘home media pc’ for some roommates once, out of old spare pc parts i had lying around, using the box their xbox360 came in as a ‘case’.
Got a paperclip with some rubberized covering, snipped a bit off the two ends, and then you had to short the right two pins on the … whatever the socket is that would normally go to the front io panel is, you had to do that to turn it on lol.
It appears to be a line signal, so it should be fine. But then again, we can’t see what’s on the other end. Could be a nuclear power plant for all we know.
Oh you’re right!
I thought it might have been the main connection between the guitar and the amp… that would have a lot more current in it, potentially, right?
I keep forgetting that I actually need to use the glasses that I now have, lol.
No, the guitar to amp “instrument line” has even lower current than the line in.
The only hazard with music instruments is if someone turns on phantom power 48V to a microphone that doesn’t use it. Then the grill can give a nasty shock and typically right on the lips.
Huh!
Well TIL, thank you!
There is no wrong cable only wrong ports.
A major advantage of analogue. Compatibility!
i find this a surprisingly elegant solution!!!
it’s nice and simple to put in place, and if you have this class of audio equipment at your whim, you probably have something to scavenge the copper from
copper does oxidize, but so long as it can trade broker enough electrons around, i’m definitely making use of this idea in the future, thank you for the post
Just use a banana, no one can’t tell the difference anyway
Banana plugs are a thing, and might even have plugged into the hole on the RCA jacks (probably not as they’re usually too wide, but it’s technically possible… I think - never tried it myself). However, they’re single conductors, not dual like RCA plugs are.
ETA: And, yes - I’m aware of the recent Tom’s Hardware article you’re referencing.
