IRC #olimex 2017-09-11

[09:07:13] <leon> morning
[18:33:42] <silver_hook> I’m trying to connect some jumper cables to my Lime2, but the spacing on the GPIO is to narrow (silly me just assumed it’s the same dimenison)
[18:33:49] <silver_hook> What’s the best way to fix this?
[18:34:49] <silver_hook> Is there a GPIO 0.05 ↦ jumper 0.01 converter available?
[18:35:16] <silver_hook> Preferably one that takes up as little space as possible, since the box is a bit crowded already.
[19:06:48] <adj__> silver_hook, https://www.olimex.com/Products/OLinuXino/A20/A20-OLinuXino-LIME2-UEXT/open-source-hardware
[19:07:19] <silver_hook> adj__: I was wondering if that’s it.
[19:08:42] <adj__> you also need a 0.05" cable
[19:09:50] <silver_hook> adj__: I thought you stick that adapter already on the GPIO and simply put the 0.1" jumpers into this adapter
[19:09:50] <adj__> silver_hook, ^
[19:10:05] <silver_hook> adj__: Where should the cable go in this case?
[19:10:16] <adj__> silver_hook, both board and this board adapter are male
[19:10:26] <adj__> https://www.olimex.com/Products/Components/Cables/CABLE-40-40-10CM/
[19:10:42] <adj__> is board to board female/female cable
[19:11:19] <silver_hook> Oh, i though the holes at the bottom were OK to just put the GIPO pins in.
[19:12:14] <adj__> olimex likes to use male connectors on board, to use female cables
[19:12:23] <silver_hook> kinda makes sense
[19:12:28] <adj__> not board-board connection
[19:13:19] <adj__> except for wifi modules
[19:14:03] <silver_hook> OK, this might mean I need to find a different box to put my Lime2 in, but better then not having fans :)
[19:16:08] <adj__> silver_hook, which pins do you need for the fan? +5V, GND and single GPIO pin?
[19:16:54] <silver_hook> adj__: yup
[19:18:07] <silver_hook> Something like that: https://s55ma.radioamater.si/2015/11/16/controling-5v-fan-with-raspberrypi-poor-mans-pwm/
[19:18:12] <adj__> it's probably easier to just get one cable for each pin, not using a ribbon cable for all the 40 pin connector
[19:19:01] <adj__> yes, you can use a mosfet and use pwm to control the fan speed
[19:19:02] <silver_hook> That’s what I thought I did, but it turned out to be 0.1mm pins
[19:19:23] <adj__> 0.1 inch pins
[19:19:36] <adj__> that's about 0.54mm
[19:19:42] <adj__> sorry
[19:19:48] <adj__> 1.27mm
[19:19:51] <silver_hook> So I can’t connect +5V and GND at the same time, since the jumper cables’ encasings are too wide
[19:20:43] <silver_hook> I have both F-F and M-M jumper cables, but well, too wide for fit two next to each other into the GPIO
[19:22:00] <adj__> silver_hook, you can maybe use the (GND, +5V)) power connector for SATA
[19:22:35] <silver_hook> what about GND on one GPIO and +5V on another GPIO?
[19:22:45] <adj__> also dat
[19:22:46] <adj__> that
[19:22:57] <adj__> do you use SATA?
[19:23:29] <adj__> silver_hook, ^
[19:23:37] <silver_hook> Yeah, SATA’s taken
[19:24:00] <silver_hook> I mean, GND will be the same ground everywhere, right?
[19:24:10] <adj__> right
[19:26:07] <silver_hook> I’ll try that then first. Thanks :)
[19:28:12] <adj__> you can solder four wires to the SATA JST female connector, two for the ssd and the other two for the fan
[19:28:19] <adj__> anyway, do you really need a fan?
[19:29:54] <adj__> silver_hook,
[19:31:28] <silver_hook> adj__: *really need* – probably not. Already bought fans and really want to install them – absolutely :)
[19:32:17] <silver_hook> The lazy way out is also to disect a USB cable and simply power it through that, but then I can’t control it (that easily)
[19:32:28] <adj__> I'm happy with just a heatsink with lime2
[19:36:18] <adj__> nice to have some activity in the channel, lately leon has been so alone saying "good morning" every day :)
[20:12:53] <silver_hook> Yeah, the heatsink would probably be enough for the lime2 itself, but I worry about the HDD.
[20:13:05] <silver_hook> well, “worry” is a bit of a strong word
[20:13:24] <silver_hook> TBH I think cooling it wouldn’t hurt it and it gave me a good excuse for a fun project ;)
[20:14:18] <silver_hook> Yeah, that was a bit sad at some point. But kudos to leon – he maintained at least a spark of life on this channel, so it could flourish again later!