fl42v

joined 10 months ago
[–] [email protected] 1 points 3 weeks ago* (last edited 3 weeks ago)

I guess so, but you should check which controller is used on your bms. This guide targets bq8030, as mentioned in the readme

Edit: also, my bad: it looks like the guide doesn't show how to change the battery capacity, so recalibration is also necessary (alternatively, you can look for the values reported by /sys/class/power_supply/BAT*/energy_full{,design} in the dumped firmware and change them. However, the script is useful if your bms locked itself (in this case replacing/shorting the fuse might also be necessary, as some bms-es try to blow it when locking)

[–] [email protected] 2 points 3 weeks ago (2 children)

So, yours is core/librebooted? If it happens to be **30 series, there's also a better solution out there: https://github.com/noolex/lenovo_battery_repair

[–] [email protected] 2 points 4 weeks ago (4 children)

I cheated a bit: I had 2 dead batteries, one 72wh with a locked bms and a 22wh with one of the batteries dead, so I just soldered the batteries from the 1st one to the bms from the 2nd one leaving the factory welding in place. *Also, before disconnecting the original batteries I soldered another fully charged battery in parallel in order not to lock the bms, which may've been unnecessary given it didn't lock with one of the original packs showing 0v, but better safe than sorry.

As for soldering the cells, it's generally not advised, but is kinda ok if you're fast enough and have good flux. The trick is not to overheat the batteries, and that's it.

Also, I wrote a small calibration script (which is a fancy word for charging and discharging the battery a few times to let the bms know the cells have changed; mb helpful if you decide to give it a try (also there's tlp recalibrate, but I wanted to try amber out, so here we go :D)

 

I've replaced cells in my fake battery a few days ago, and while recalibrating the bms I noticed what looked like it trying to overcharge the cells -- the voltage went up to above 12.6v and stabilized at around 12.9 (which amounts to ~4.3v per cell and is 0.1v above what cell manufacturers generally recommend). Idk if that's the intended behavior or clone manufacturers trying to shorten the lifetime of said batteries, so if the owners with genuine batteries can provide that info, I'd really appreciate it.

On linux, you can check this with cat /sys/class/power_supply/BAT*/voltage_now (as your usual user, those files are world-readable); not sure about windows, tho.

[–] [email protected] 1 points 1 month ago

Beating good old amputation speedrun with 300% mortality?

[–] [email protected] 3 points 1 month ago (1 children)

A so-called "meta distribution", allows you to mix and match packages from some other distros. Kinda like distrobox, but older (AFAIK) and low level-er.

That said, I didn't find it exactly useful a few years ago, since pretty much everything i needed was in the aur or the official repos (should be better if the base was smth like Ubuntu)

[–] [email protected] 5 points 1 month ago (1 children)
[–] [email protected] 4 points 1 month ago (1 children)

Other inits cut out udev and logind and run away giggling into the sunset, obviously

[–] [email protected] 49 points 1 month ago (8 children)

*ssd. HDDs are somewhat good for storing large amounts of data, and the os ain't it (unless windows, probably)

[–] [email protected] 55 points 1 month ago (2 children)

How about Numbers 31:17-18 where Moses says:

Now therefore kill every male among the little ones, and kill every woman that hath known man by lying with him.

 But all the women children, that have not known a man by lying with him, keep alive for yourselves.

[–] [email protected] 35 points 1 month ago (1 children)

As a Russian bot, I'm deeply offended

[–] [email protected] 30 points 2 months ago (2 children)

This one doesn't, tho, unless you care how presentable the back of your pc is... And mine was for a few years just an array of parts and wires on the side of my desk, soooo...

 

Out of curiosity, I've been watching a few restorations of those spectrums, and I've noticed the keyboards having a rather peculiar construction, judging by today's standards. They have 2 springs, the small one, as far as I understand, presses the membrane layers together, and the larger one returns the key into neutral position once the key is released.

I personally haven't used any spectrums, yet I've encountered the very same construction on a keyboard of a Russian clone of said machines (namely, zx atas), and to this day I haven't touched anything worse... The only way I can describe it is like trying to type on a piece of raw meat.

So, if anyone here had a chance to type on the original spectrums, was it this bad? I suspect otherwise since I haven't heard of crowds of people requesting PTSD treatment, but the whole thing still somewhat bothers me 😅

 

Just thought I'd share. Probably nothing new or fancy, but may help some of you find a way to repurpose devices that aren't worth repairing into home servers or something: e.g. op5 I've used has better CPU compared to raspberry pi 4, can run linux (postmarketos, albeit with some caveats), and costs less if bought with broken display (or nothing if you have one lying around)

 

Decided to share an older "project" of mine - ms sculpt wireless to wired conversion (also, it runs qmk, so we get all its features). A sensible person would order a custom pcb (such projects exist on the web, take a look if you're interested), but I went with removing all the components except from the ribbon cable connector, sending the PCB smooth, gluing a piece of discount card to isolate the traces, gluing a Chinese rp2040 on top, and wiring all the necessary traces to it. No, it wasn't fun. Yes, it works.

Bonus: when I disassembled it now I found out the type-c wasn't soldered well and decided to separate from the board:

ResizedImage_2024-04-08_18-20-32_2

So, here we go: using phone as a poor man's microscope (note: also, still works)

ResizedImage_2024-04-08_18-20-32_1

The end result kinda doesn't give it out, so whatever (insert your frontend -- backend jokes here)

ResizedImage_2024-04-08_18-36-32_1

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submitted 4 months ago* (last edited 4 months ago) by [email protected] to c/[email protected]
 
 
 
 
 

So, a while ago I bought a cheapest oneplus 6 available in my area to subject it to a few experiments with running Linux. Among the other issues that came for that price, the power button was almost flush to the frame, hard to press, and had almost no feedback.

Today I finally got tired of it and decided to check what's wrong. The button itself turned out to be just fine, but the thingy that presses it looked weird:

ResizedImage_2024-03-12_23-02-59_1

After a few tries of gluing smth to extend the middle pin, I found out that I can just cut off a piece of plastic from the blister of my favorite headache pills and place it between the button and said thingy. Works wonders 🤣

ResizedImage_2024-03-12_23-07-45_1

Btw, the actual problem is that it was missing a few rubber spacers, as far as I understand, but whatever

ResizedImage_2024-03-12_23-11-42_2008

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