smol ups
>>107501723>connected in seriesrejected
>>107501723seems BASED, does this really work /can it work?That is a huge problem for SSDs. Getting one that 100% guarantees it will at least not damage *itself* on random powerdown - is SSD with super caps - and costs like x2 x3 and doesn't even fit normal m2 mounting places.
>>107502135>does this really work /can it work?*Can* it? Sure.*Does* it? I lack data.It's self-defines as "UPS", but I can't see what it's pluggin' into... Or how that's connected to the Pi. It's just batteries in a case.You can get caddies that will hold 4/6/8 18650's, curious them used 3x 2's. Personally, I'd be feedin' them batteries into a buck converter, say an LM2596, to feed the pi, and an LM3420 with passthrough circuit to charge the batteries...Tho what's happening on that board I've no idea...
>>107502206>Tho what's happening on that board I've no idea...it would need to somehow warn the disk (ssd) that there is problems inbound and time to shut the hell down, for it to really work (in case of longer out of power, or computer is shutdown).I wonder if some kind of bypass for sata link or even worse for m2 link would be possible there. or some other way to notify the disk to stfd
>>107502312Notification is a solved problem...But on the same PCB as the charge controller and the buck converter, a lil pico or suttin could monitor the pack charge. Maybe even run a lil OLED or eink if feeling fancy, but when it drops to say, 30% capacity, issue a signal. Simple one liner can 'listen' for the signal and on detection, issue shutdown commands...
>>107502312If building 1, a PCB might not be cost effective... But if you can fit it 5cm x 5cm - which sounds do-able - then you can have a few boards made up relatively cheap... and it'll work better than a rats nest, long term. Especially if it ever gets moved about...Should be able to use something like 'fritzing' to digitally replicate your ratsnest/breadboard layout, and with a click of a tab, be looking at a PCB design...
>>107502385>Simple one liner can 'listen' for the signal and on detection, issue shutdown commands...but how you issue the shutdown command - to the disk.Maybe we talk about different use case.My use case is as follows: big PC, that doesn't have a full UPS because it takes like 1500-2000 W and that would get expensive/heavy.So computer can die at any time.That is *fine*.The big problem not the half-written data from the OS. That has some solutions.The big problem is that if you suddenly cut power to the SSD that is in middle of working, it can brick itself. Lose of all data at once is possible. Actually it is even possible to make the device unusable (before some expensive reparis) from what I read.So I need to power SSD with own micro UPS, but also I need to tell the SSD to shut itself down - even when the CPU dies.How to signal to SSD, connected with data to M.2 / sata data port, to shut down, from my separate device?Or will it shut down when it seems that the SSD/M.2 link suddenly died?
>>107502453>but how you issue the shutdown command - to the diskYou don't?You issue the shutdown command to the *computer*.>Maybe we talk about different use case.What you're describing there is *very* different to picrel.It *should* in theory be possible to shim the power over to the SSD, so in the event of power failure, it still gets some. As for "shutting it down" I can't recall such an ability existing. I'm kinda thinkin' the drive's firmware takes care of this crap. It'd not stop data corruption from ½ written data ... and I don't honestly know how it'd handle linkdead... Mechanical drives tend to head park after X ... but SSD's aint got heads...
>>107502453>The big problem is that if you suddenly cut power to the SSD that is in middle of working, it can brick itself.I'm maintaining like 50 pc's and couple at servers at work, no ups on anything and never had ssd brick on me.
>>107502525I had 2 SSD brick at same time on me, when computer lost power recently.Lost fortune in BTC that day.
>>107502563>Lost fortune in BTC that day.But learned a relatively cheap lesson about backups, and data security.Things like wallet keyphrases can encrypt reasonably easily, and email should be able to give you offsite backup. A MicroSD card or two blutacked to the underside of a desk, back of a random road sign, under a park bench, etc can't hurt any either...But I feel for you. I lost 9 in an unlawful data destruction.
>>107502563ffs, burn a mdisc dvd or a archival blueray...
>>107501723Just use an old laptop
>>107501723>homemade ups>chink 18650 batteries with almost certain contaminationwhy don't you just douse your house in gasoline and light a match, to save yourself the time and trouble.
>>107506234>>chink 18650 batteries with almost certain contamination>why don't you just douse your house in gasoline and light a match, to save yourself the time and trouble.audiable kek
>>107501791It looks like it’s 4p2s
