13:46 <_whitenotifier-f> [glasgow] FFY00 commented on pull request #207: applet.internal.selftest: permit pin mapping to be direct instead of swapped - https://git.io/JUagJ

15:54 <d1b2> <Attie> a small update, in case people are interested - the revC1 run I did was 48x boards, 1x failure but simple fix (rogue solder causing a short), and 1x failure due to low-resistance between two of the I/O pins

15:54 <d1b2> <Attie> in the latter case, i see ~48 MOhm between the pins that are reported as "shorted", and ~180 MOhm between other I/O pins

15:56 <d1b2> <Attie> running the pins-ext test shows an intermittent failure, taking a series of samples quickly shows the neighbour's value change some time after the drive pin's output value is set

15:56 <d1b2> <Attie> I'm currently suspicious of the resistor networks / esd protection, but visual inspection doesn't show anything up, and I've not spent much time on it.

15:58 <thasti> very interesting, thanks for sharing! where did you do the PCBA?

16:13 <d1b2> <Attie> no problem! i used PCBWay

16:25 <_whitenotifier-f> [glasgow] attie commented on issue #206: Method to list connected Glasgow boards - https://git.io/JUa6Y

16:35 <gruetzkopf> nice!

16:41 <sorear> isn't 50 MOhm what normal electronics people call "not connected"?

16:41 <sorear> yes, I've seen metrology papers with TOhms in them

16:47 <tnt> I'm not even sure I have anything that can measure 180 MOhm ...

17:11 <_whitenotifier-f> [glasgow] attie opened pull request #208: Method to list connected Glasgow boards - https://git.io/JUaP6

17:12 <d1b2> <gimbas> > I've also noticed that the FX2, ICE and all User LEDs appear to be "dim" (~2.2v on the other side of the resistor) after first powering up, but after running an applet, they become full brightness (and match the PWR LED intensity, at ~3.3v)... @Attie I was going to ask about this after i assembled my first 2 glasgows last week (finally, only took me 6 months 😅 )

17:14 <d1b2> <Attie> ha... I would indeed consider 50 MOhm "not connected", though in this situation there appears to be enough current passing to pull a "floating" pin around.

17:14 <d1b2> <Attie> I've not looked with a scope yet (and suspect that at these values the scope would alter the situation), but from just resampling and printing, you can see the transition after a small delay

17:15 <d1b2> <Attie> I'd expect to see a typical RC type curve here, if the act of measuring doesn't alter it too significantly

17:18 <d1b2> <Attie> tnt - my multimeter claims a range up to 200 MOhm, but

17:18 <d1b2> <Attie> *2 GOhm

17:18 <d1b2> <Attie> ... but it gets quite squirrely up there - you need to wait and watch it settle

17:19 <d1b2> <Attie> (could be capacitive effects too though)

17:19 <d1b2> <Attie> @gimbas yay, well done!

17:21 <_whitenotifier-f> [glasgow] Success. The Travis CI build passed - https://travis-ci.org/github/GlasgowEmbedded/glasgow/builds/730327000?utm_source=github_status&utm_medium=notification

17:23 <tnt> Attie: I'd be curious to know what kind of voltage it puts out on that range.

17:43 <d1b2> <Attie> seems to be ~0.7v ... when measured with another multimeter that brings the measurement down into range

17:43 <d1b2> <Attie> i've got a couple of videos incoming to show things a bit better

17:52 <d1b2> <Attie> https://www.youtube.com/watch?v=EiZiPzrNFHw

17:53 <d1b2> <Attie> https://www.youtube.com/watch?v=a8XMLLSb13I

23:00 <d1b2> <Attie> @tnt - not sure if you saw the above