What can I do to make any of this useful?
▲ 2 r/diybattery+1 crossposts

What can I do to make any of this useful?

https://imgur.com/a/2LlyjtV

What I have that I don't know what to do with

  • 64x 18650 cells (3.7V, 2.2Ah, 8.14Wh each, 520.96Wh total).
  • 2x https://www.amazon.com/dp/B09S3LZN2Q?th=1
  • 1x https://www.amazon.com/dp/B09S3JRFDF?th=1
  • Daranener NEOZ with a bad BMS (won't charge, blinking blue LED on the board inside), but the battery cells seem good.
    • Outside of Power Station, the pack is reading around 18V
    • The batteries are 14x 26700 cells (3.2V, 14.4Wh each, 201.6Wh total) in what looks like a 7s2p configuration.

I'd like to make use of these cells in a cost effective manner.

I have a Pecron F3000LFP which is possible to add a 3rd party expansion battery to, if you build a custom terminals-breaker-XT120 cable to connect the battery and Pecron.

Ideas with limitations

  • I could buy two more snap-in PCBs and make one large 12V Power Bank, that I don't really have a use for. ~$40
  • I could buy two more snap-in PCBs and three more BMSes to create 4x 12v packs, put them in series for 48v, and connect to the Pecron. Super Jank. ~$120-$140
  • For 2x the price of doing the above, I could just buy a 48V 25Ah battery for the Pecron. Doesn't actually solve the above issue. ~$225+
  • I could just buy a spot welder. But then I'd have all these cells and a spot welder and still not have a use for the cells. $50+
  • Build new power station with the 26700 cells, but the rest of the components are usually the more expensive aspect.
    • Either the components of the Daranener aren't salvageable (custom PCB with everything on it), or I'm not knowledgeable enough to reuse them.

What I don't need them for

  • I already have 6-10 more 18650 cells for headlamps, Raspberry Pi projects, ESP32 projects
  • I already have a server UPS that is the backup for my modem+server rack
  • I already have too many power banks so don't need to make another.

Or do I just sell off the cells + PCBs?

I feel like I'm in between having too few cells to justify a spot welder for a bigger battery project and having too many cells for just making a simple power bank to charge my phone/laptop.

Thanks in advance

u/bigrjsuto — 11 days ago
▲ 665 r/joplinapp+1 crossposts

No more jumping between daily notes—just scroll through them

I've been writing my journal in Obsidian, and navigating between my often-short daily notes wasn't easy. For some time, I used a template that linked each daily note to the previous and next day so I could navigate forward and backward by clicking on the links, but it still didn't feel convenient.

Then I tried existing plugins—for example, the first result, the Journals plugin. It seemed complicated, required me to create a new journal for some reason, and offered more than I needed.

I use daily notes a lot, but constantly opening separate files made the experience feel less like a journal and more like navigating a folder.

So finally, I built the Journal View plugin. It brings my existing daily notes together in one continuous, editable timeline. I can scroll through previous days, write directly in the timeline, jump to a date with the calendar, search old entries, and return to today without breaking my flow.

https://community.obsidian.md/plugins/journal-view

There’s no migration, special format, duplicate files, or account required. It just adds a new view, like Graph View, and that’s it.

I’d love to hear your feedback and improve it further, and I’d appreciate it if you gave it a try.

u/alirezaekt — 15 days ago
▲ 1 r/esp32

Is there an automatic power transfer switch (120v) controlled by an ESP32 device?

I was trying to think if I could put together a diy load shifting setup for my homelab + main PC using a LiFePO4 battery + inverter. Obv there are portable power stations (Anker, EcoFlow, Pecron, etc) that can do this within their apps, but I would prefer not to have an extra app and instead use ESPHome + HomeAssistant for power monitoring and automations for when to use outlet power and when to use the battery.

Maybe a module that could connect to an ESP32 doesn't exist that could reliably switch the power fast enough.

I saw a post from years ago thinking about using an old UPS' insides to make this happen, but I don't see anything come from it.

reddit.com
u/bigrjsuto — 3 months ago