| - natalie (QUIT: Ping timeout: 265 seconds) (~natalie@user/natalie) | 00:19 | |
| + natalie (~natalie@user/natalie) | 00:32 | |
| technomancy | yesssss https://icosahedron.website/system/media_attachments/files/106/649/490/860/534/145/original/baebc19f1a9e4385.jpg | 01:30 |
|---|---|---|
| technomancy | it's just one button but it feels real good | 01:30 |
| ex-parrot | Nice | 01:35 |
| ex-parrot | Click click | 01:36 |
| - natalie (QUIT: Remote host closed the connection) (~natalie@user/natalie) | 01:36 | |
| ex-parrot | I have rebuilt the firmware to make the button layout more thinkpad-like but didn’t flash it yet | 01:36 |
| technomancy | I've been meaning to reduce the sensitivty; it's soooo high | 01:37 |
| technomancy | does that require reflashing? | 01:37 |
| + natalie (~natalie@user/natalie) | 01:38 | |
| ex-parrot | You can probably tweak that in software | 02:16 |
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| + adjtm (~adjtm@188.26.220.205) | 12:27 | |
| + royo (~royo@user/royo) | 12:31 | |
| ex-parrot | After telling myself I wouldn’t I accidentally let my battery run down too low :/ | 12:55 |
| ex-parrot | Going to leave it on charge for a bit and see if it can recover | 12:55 |
| mntmn | oop | 12:58 |
| mntmn | really need to work on the deep sleep stuff | 12:58 |
| epilys | the reform is really *only* 1.9kg? that's with battery cells correct? | 13:00 |
| ex-parrot | I wish I could help but my life is being unexpectedly hectic :/ | 13:00 |
| ex-parrot | so hectic I somehow didn’t use my computer all week apparently | 13:00 |
| mntmn | epilys: yeah maybe a few grams more ;) | 13:00 |
| mntmn | epilys: def. not much more | 13:00 |
| epilys | lighter than my thinkpad | 13:00 |
| ex-parrot | The weight distribution feels pretty good I reckon too | 13:00 |
| epilys | can't wait to get a job so I can buy the reform :x | 13:00 |
| mntmn | ex-parrot: i know the feeling. what saves me is that i watch ds9 every night on it | 13:00 |
| mntmn | epilys: :) | 13:00 |
| ex-parrot | lol! | 13:01 |
| ex-parrot | I guess that’s good advice | 13:01 |
| mntmn | i have a hack so that i can watch netflix | 13:01 |
| mntmn | using a 32bit chroot and vivaldi | 13:01 |
| ex-parrot | sneaky | 13:01 |
| ex-parrot | otoh worst case if I did ruin the cells I have a box of new 18650s already in my office for another project so I will live | 13:02 |
| mntmn | ex-parrot: i hope they are lifepo4 | 13:03 |
| ex-parrot | They probably aren’t tbh | 13:03 |
| ex-parrot | I should check that | 13:03 |
| mntmn | btw i ~believe~ (totally untested) that one could try *protected* liion cells | 13:03 |
| mntmn | but only ones with built in protection! | 13:03 |
| mntmn | because there is no temperature monitoring for the batteries | 13:03 |
| mntmn | and this is normally required to charge liion | 13:03 |
| ex-parrot | On the Novena I tweaked the low voltage cutout of the gas gauge chip but I still managed to cook the lipo pack | 13:03 |
| ex-parrot | ah yeah, that makes sense | 13:04 |
| mntmn | otherwise you got a fire hazard on your hands | 13:04 |
| mntmn | and you don't want a lithium fire in your home | 13:04 |
| ex-parrot | that’s good life advice | 13:04 |
| mntmn | the ones with protection are pretty expensive and also the protection renders the battery inoperable, but at least they won't explode i guess | 13:04 |
| ex-parrot | the death of the proprietary lipo pack was kind of the end of the novena for me | 13:04 |
| epilys | how hard would it be to retrofit monitoring on the charging circuit? | 13:04 |
| mntmn | but also that would give maybe 8-10 hours runtime | 13:05 |
| mntmn | epilys: not so hard actually | 13:05 |
| mntmn | def. hackable | 13:05 |
| ex-parrot | these are probably just unprotected lithium ion cells tbh | 13:05 |
| mntmn | but i want only people who have a lot of experience with liion to do this | 13:05 |
| ex-parrot | your reminder was timely | 13:05 |
| mntmn | because the danger is really real | 13:05 |
| mntmn | lately someone posted an US source for the lifepo4 cells here | 13:06 |
| mntmn | ah but you need a... NZ source right? | 13:06 |
| ex-parrot | the company I used to work for gave out USB power pack things as an Xmas gift to our clients but we had to recall them due to the pouches exploding | 13:06 |
| ex-parrot | right | 13:06 |
| epilys | https://upload.wikimedia.org/wikipedia/commons/0/0b/Li-ion_battery_explosion.jpg | 13:06 |
| epilys | Ok someone with experience or a lot of open space? | 13:07 |
| mntmn | oof these are comically overpriced https://www.mrpositive.co.nz/generic-18650-3-2v-1600mah-lifepo4-battery/ | 13:07 |
| mntmn | like 10x the normal price | 13:07 |
| ex-parrot | I have a big pile of all the recalled pouch cells, I should see if I can bodge a few in to the novena somehow | 13:07 |
| epilys | mntmn, (thats nz dollars ) | 13:07 |
| mntmn | ah | 13:07 |
| ex-parrot | I decided I’m going to build the “prototype novena” in a cardboard binder out of my production novena, devolve it if you will | 13:08 |
| mntmn | ok then its only 6-7x overpriced | 13:08 |
| mntmn | btw it might be possible to run reform on a USB-C power delivery (20V) powerbank | 13:08 |
| ex-parrot | I’m not sure I’d want to pay $25/cell for “generic” | 13:08 |
| mntmn | if you manage to convince it to output the 20v | 13:08 |
| mntmn | ex-parrot: yes it is wildly overpriced | 13:08 |
| mntmn | i should make some kind of dummy device that i can fill up with batteries to be able to ship them | 13:08 |
| mntmn | because i am only allowed to ship batteries inside of devices | 13:09 |
| ex-parrot | I actually bought a couple of USB-C to ThinkPad cables, I intend to splice one in to a USB-C to Reform cable, it has whatever is required in it to configure the PSU for 20v | 13:09 |
| mntmn | ex-parrot: ok cool that should work | 13:09 |
| ex-parrot | getting lithium batteries in NZ has become difficult due to air freight restrictions | 13:09 |
| mntmn | ex-parrot: i see | 13:09 |
| ex-parrot | But I can probably source the lifepos if I need to | 13:10 |
| mntmn | ok | 13:10 |
| ex-parrot | They may have to come on a boat from Australia | 13:10 |
| - piroko (QUIT: Ping timeout: 258 seconds) (~piroko@104.225.216.16) | 13:10 | |
| - tarxvf_ (QUIT: Ping timeout: 258 seconds) (~tarxvf@mail.tarxvf.tech) | 13:11 | |
| ex-parrot | is it possible to configure a low voltage cutoff threshold for the gas gauge implementation in the Reform? | 13:11 |
| ex-parrot | ones I’ve used in the past had a configurable point at which they just cut the discharge FET | 13:12 |
| + tarxvf (~tarxvf@mail.tarxvf.tech) | 13:12 | |
| ex-parrot | This is a more reputable supplier though the price is still steep: https://www.jaycar.co.nz/18650-lifepo4-battery-1600mah-3-2v/p/SB2307 | 13:13 |
| mntmn | there is one | 13:15 |
| mntmn | like, it turns off the reform ;) | 13:15 |
| mntmn | but... there is no cutoff for the 3v3 standby power, and that drains the batteries | 13:15 |
| mntmn | the chip you want to disable is U14 | 13:16 |
| mntmn | it even has an R0 on the enable pin | 13:16 |
| mntmn | but! | 13:16 |
| mntmn | it appears to have an internal pullup for enable | 13:16 |
| mntmn | so you need a pulldown to keep it off | 13:16 |
| mntmn | so that will leak some power | 13:17 |
| ex-parrot | Ahh | 13:17 |
| ex-parrot | Sorry I missed that detail previously | 13:17 |
| mntmn | naja i only recently realized this myself | 13:17 |
| ex-parrot | I need to spend some quality time with the schematic and understand the power supply section | 13:18 |
| mntmn | yeah | 13:18 |
| mntmn | it is not so complicated if you ignore the main buck/boost ;) | 13:18 |
| mntmn | i.e. the LTC4020 | 13:18 |
| ex-parrot | ACTION signs off for today | 13:20 |
| ex-parrot | what are the odds that my reform explodes if I leave it charging overnight from this state? | 13:20 |
| mntmn | ex-parrot: lifepo4 doesn't typically explode | 13:22 |
| mntmn | ex-parrot: the worst i've seen is some liquid coming out | 13:22 |
| mntmn | ex-parrot: if you have a lab power supply you can easily revive the cells one by one btw | 13:22 |
| mntmn | or just some 2-3v power source | 13:23 |
| ex-parrot | oh yeah. I’ve always been discouraged from doing that 😂 | 13:23 |
| mntmn | that can do ~2A | 13:23 |
| mntmn | ex-parrot: no it's ok with lifepo4 | 13:23 |
| mntmn | just don't do it with liion i guess | 13:23 |
| mntmn | ex-parrot: if you manually charge it at lets say 2.6V for a minute the cell should recover, except if it is completely dead | 13:24 |
| ex-parrot | https://img.hotplate.co.nz/awWzljYq finding a lab PSU should be possible here | 13:24 |
| ex-parrot | ok cool. that’s also good to know | 13:25 |
| ex-parrot | when plugged in are the individual cell voltages in the circle-b menu the voltage being applied to the cells to charge? | 13:26 |
| mntmn | well | 13:29 |
| mntmn | it is what the cell voltage and the charge voltage physics agree on | 13:30 |
| ex-parrot | got you | 13:30 |
| ex-parrot | Alright I’ll see what this thing looks like in the AM. thanks for the help! | 13:31 |
| mntmn | no problem! | 13:32 |
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