// #eevblog — 2018-11-30
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00:53:16 Quit: flewkey ([email protected]) Ping timeout: 121 seconds
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01:58:29 <Ampera> lol
04:10:03 Quit: coppice ([email protected]) Connection closed
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06:08:25 Join: Elliot ([email protected]) to #EEVblog
06:11:49 <Elliot> Hey everybody, I'm looking for advice. A little backstory...our company is in the process of migrating to a different manufacturer for our product.
06:12:45 <Elliot> My boss had been handling the transition but he left our company last week so I am now responsible the technical aspects of the migration.
06:13:46 <Elliot> I am an electrical engineer with some design and manufacturing experience, however my boss didn't do a great job handing things off so there is a lot of unknowns here for me.
06:14:18 <Elliot> I am also new to the company (I joined 6 months ago) and am not very familiar with the design of the product.
06:14:50 <Elliot> Anyways, the product has a 2.4 GHz WiFi radio and a 915 MHz LoRa radio.
06:15:17 <Elliot> The manufacturer wants to change the PCB laminate because of availability issues with the specified laminate.
06:15:42 Quit: mrpackethead ([email protected]) Quit: Leaving
06:16:37 <Elliot> We specified using Isola IS-410 and the new material is Shengyi S1000-2
06:17:25 <Elliot> I asked our current manufacturer and it appears that we are actually using IT-180A as the laminate.
06:20:04 <Elliot> My concern is that the Dk for S1000-2 is specd at 4.8@1MHz (they don't provide the 1GHz rating) whereas Dk for IT-180A is specd at 4.4@1MHz
06:20:42 <Elliot> I am wondering if anyone has a advice on how this may effect the impedance of the antenna traces for the Wi-Fi and LoRa antenna traces on the board.
06:20:53 <Elliot> ?
06:42:42 Join: coppice ([email protected]) to #EEVblog
06:42:42 Mode: (by ChanOP) +o coppice
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08:27:49 Join: Guest|81312 ([email protected]) to #EEVblog
08:28:33 <Guest|81312> Hi
08:28:50 <Ampera> Hello
08:29:52 <Guest|81312> I was wondering if anyone have made their own lipo warmer/heater
08:31:36 <Ampera> To heat a lipo battery, or a heater made using a lipo battery?
08:31:43 Quit: Crazor ([email protected]) Client exited
08:31:44 <Guest|81312> I was thinking about using PTC heaters, but must I can find is 12 or 24v, but I want to use them from my 5S 18V powertool battery
08:32:08 <Guest|81312> Kinda both, a lipo heater powered by a lipo battery .
08:32:25 Join: Crazor ([email protected]) to #EEVblog
08:33:37 <Ampera> I mean if it's a resistive heater, then you could likely just underpower the 24v heater on 18v.
08:34:00 <Ampera> It would produce less heat, but it wouldn't burn out.
08:34:07 <Guest|81312> It is. But how will I know the maximum temperature of the PTH heater then ?
08:34:15 <Ampera> Plug it in and measure it?
08:34:45 Quit: Crazor ([email protected]) Client exited
08:34:47 <Ampera> I don't know if the heat produced by resistive heating elements is on a linear scale relative to voltage, or anywhere close, but that would, in my mind, be the question you'd have to look for.
08:35:43 <Ampera> I'd imagine it is, because the energy has to go somewhere, so it's possible a 24v heater on 18v just produces 9/12ths the heat, but I'm not completely sure.
08:35:50 <Ampera> coppice, any input if you're on?
08:36:08 <Guest|81312> It's a Positive Temperature Coefficient, so the resistance thru the heater rises with temperature
08:36:32 <Ampera> aye.
08:36:57 <Ampera> but I'm just a hobbyist, so I don't know perfectly. The forums are also a great place to ask questions if you want to be sure.
08:37:50 <Guest|81312> I already tried the forums. But no matter what I try and post it just reverts back the to make a new topic when I press post topic .
08:37:53 <Ampera> As I said, the possible maximum temperature of the unit is just linearly relative to the power you put into it.
08:38:00 <Ampera> What browser are you using?
08:39:11 <Guest|81312> I'm on the phone, my PC is having some troubles with the "great" October windows update.
08:39:36 <Ampera> I'd go on about Linux, but I imagine you've heard it all before.
08:39:53 <Ampera> I've ususally had no problems using Chrome on Android for posting on the forums, but I believe the forum supports tapatalk.
08:40:10 <Ampera> You can also just wait around for someone like T3sl4 or Halcyon to come on, they tend to know more than I.
08:40:15 <Ampera> (or coppice)
08:40:21 <Guest|81312> Yeah .would use Linux if the misses didn't need her games on Windows .
08:40:38 <Ampera> dual boot, or just use something like Proton, which is actually pretty decent.
08:41:02 <Ampera> It supports a good chunk of Steam games now, and I believe you might be able to use it on non-steam titles.
08:41:17 <Guest|81312> Used SuseLinux back when it came with like 9 CDs and a manual for them all. I use boot it - bare metal for multiboot
08:41:43 <Ampera> or virtualize. I just got sick of WIndows' shit, and even though I have some programs I don't have Linux replacements for, like Fusion 360, I'm quite happy with being moved completely onto Linux.
08:42:02 <Ampera> I use Arch Linux, becuase I'm me, but dual booting Linux/Windows is quite easy, so long as you have the space.
08:42:19 <Ampera> However, I presume you've also heard it all before.
08:42:40 <Guest|81312> Yep. I do .
08:42:50 <Ampera> Stick around, though, we recently moved channels from AfterNET to AustNet and are still waiting for people to move on over.
08:43:08 <Ampera> wait, steve30, are you around?
08:45:01 <Ampera> I've also just asked on the old channel, maybe someone there can give an answer, I'll relay to you if there is anything.
08:45:31 <Guest|81312> Thanks
08:46:50 <Ampera> https://electronics.stackexchange.com/questions/127419/max-temperature-of-ptc-heater-need-tip
08:46:53 <Ampera> This may also help.
08:48:55 Quit: Guest|81312 ([email protected]) Quit: http://www.kiwiirc.com/ - A hand crafted IRC client
10:05:06 <DHess_US> https://www.theonion.com/nasa-catches-glimpse-of-hard-charging-curiosity-rover-j-1830689267
10:56:06 <damian> lol, poor insight
12:12:03 <DHess_US> obligatory, https://xkcd.com/1504/
12:23:23 Quit: flewkey ([email protected]) Changing hosts
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12:35:54 <damian> ahahah
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16:18:37 <Halcyon> Greetings all
16:19:49 * Halcyon pokes Ampera
16:52:25 <Halcyon> I might go have a nap
17:22:29 <Halcyon> *stretches*
17:35:50 <Halcyon> DHess_US: Yes, awesome! I can relate to so many XKCD comics
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23:28:35 <damian> .
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