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Paul “LeoNerd” Evans
Lives in London
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Paul Evans

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Folks into #electronics and #PCB design: Know any articles about when to use vias, and when to avoid them in favour of longer snake tracks?

I don't feel I have a good grasp of when to prefer one of over the other in any particular situation. Looking for some guidance. Nothing high-frequency or high-voltage - mostly at-most 12V, microcontrollers, sometimes up to 20MHz or so.
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Paul Evans

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After I was done ranting about feature requests, someone asked me if I wanted a pony with it. Here is my response

http://memegenerator.net/instance/55929205
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Lps Skyra's profile photo
 
Just wondering, but r u a 12 year old from ny with a identical twin named raphiel? Sorry just need to know if u r my friend from school
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"As a company they should fight other companies and shady suppliers, instead of retrospectively punishing end users who cannot possibly know origin of each chip used by the product they bought year ago."

#FTDIGate #FTDI #electronics  

http://zeptobars.ru/en/read/FTDI-FT232RL-real-vs-fake-supereal
FTDI FT232RL: real vs fake. For quite some time when you buy FTDI FT232RL chips from shady suppliers you have a good chance of getting mysteriously buggy chip which only works with drivers 2.08.14 or earlier. We've got a pair of such FTDI FT232RL chips - one genuine and one fake and decided to ...
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And there's no tool to tell them apart that I've found yet. Apart from not working/bricking.
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If anyone knows about #nRF24L01+ radio modules and electronics hackery, I'd appreciate a hand with this question:

https://electronics.stackexchange.com/questions/129520/exchanging-packets-over-an-nrf24l01
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Paul Evans

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Dear Google:

Why have you spent a decade or so of web presence teaching everyone that a single click is all you ever need to do something, only to publish a New #GoogleDrive that requires me to double click on a document to open it?

What; is it 1990 again all of a sudden?
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Alastair McGowan-Douglas's profile photoRalesk Ne'vennoyx's profile photo
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And a separate app for doing things, and being unable to just show a file as text, and...

Bleh.
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Paul Evans

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How do you debug #udev? Seriously?

It's a stupid black box that has no log file, and no --verbose or --debug or whatever modes. It doesn't /appear/ to be applying my config. How can I see what it's doing to know for sure?
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Shival Wolf's profile photoElectra Flarefire's profile photo
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It works so well for users! And makes much magic happen in a clever way!
And I wish it was easier to work out what was going on!
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Paul Evans

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So I think I worked out why I was having trouble with my #soldering last night... Someone tell me if I'm going crazy here, or if this sounds plausible

The solder I have doesn't seem to have flux in it, because no amount of melting it ever produces any white smoke. However, if I cut through it with a sharp knife I do still see what I think is an inner core that looks "different" - still grey, but less shiney than the outside. I also observe that I need to get the iron quite hot on the temp. control in order to melt new solder off the reel, but having melted it once and let it cool into a ball, I can remelt that at a much lower temperature; even at a temperature which will not melt fresh stuff.

I think therefore, that what I have is 63/37 solder comprised of a solid core of 37% lead, surrounded by a jacket of 63% tin - needing, therefore, to be hot enough to melt each on their own the first time, at which point they mix and alloy themselves together into the actual eutectic mixture.

Does that sound plausible?
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Paul Evans's profile photoIngvar Mattsson's profile photo
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So not stale flux. :) Does setting the tip temperature to 250 Celcius produce any evidence of melting anything? That should be enough to melt the tin, but not the lead.
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Paul Evans

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Dear world:

I have a computer, A, on which is a big disk with lots of music. I have a computer, B, which is attached to my screen, keyboard, and speakers. Ohyes, and B is a laptop which moves from place to place.

Get music from A onto B.

 * Mounting filesystems is far from reliable, often gets upset over laptop suspend/resume

 * mpd is great for transport control but doesn't carry the audio path

 * Pulse's network audio solutions are all crazy, don't work over routers, spin my router CPU

 * trx can't cope with mismatched audio rates

 * Shoutcast copes terribly with packet loss, building up many many seconds of audiolatency.

Someone please explain how - I'm refusing to believe it's as difficult as I'm finding it.
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Steven Thurgood's profile photoIngvar Mattsson's profile photoPerry Lorier's profile photoOliver Brammer's profile photo
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Plex / XMBC server on machine A, and machine B streams via the browser or client? It's an elegant solution. 
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Paul Evans

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My #Perl #Futures talk from YAPC::EU has now made it up to YouTube.

Asynchronous Programming with Futures
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Paul Evans's profile photoKenny Root's profile photoRalesk Ne'vennoyx's profile photoJesper Näsström's profile photo
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Oooh, nice stuff :)

Also hi +Kenny Root , love ConnectBot since my first Android device :)
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Paul Evans

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I don't suppose anyone has any ideas on building an #AVR HVSP programmer, for the 8/14 pin ATtiny chips? I can find plenty of projects online about fuse resetters, to simply re-enable ISP again, but that isn't what I want. I want a full HVSP burner as I want to develop a design for an ATtiny84 using all 12 GPIOs

Obviously I now of the SKT500 or Dragon, but I don't want a full massive board. It strikes me fairly simple to build an HVSP controller out of a second ATtiny, something that avrdude would be able to drive.
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Mike Cripps's profile photoElectra Flarefire's profile photoJP Sugarbroad's profile photo
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The doctor boards could probably do hvsp programming with appropriate firmware.
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Paul Evans

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What I've been working on the past few weeks:

Matrix is a new open standard for interoperable Instant Messaging and VoIP, providing pragmatic HTTP APIs and open source reference implementations for creating and running your own real-time communication infrastructure.

http://matrix.org/ - A new basis for open, distributed, real-time communication
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voice over ip, or video?
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Paul Evans

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Eh.. There once was a time I used Windows, and it would do Weird Random Things sometimes that I would have no understanding what it was doing. Then I moved to #Linux and all was OK.

Today, #PulseAudio is being weird. It just refuses to make any sound on my laptop when undocked, even though it plays fine on the dock.

Dudes - this is why I left Windows. I don't like black boxes with inscrutable internals that do "weird random things" that I don't understand.
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Jelmer Vernooij's profile photoKent Fredric's profile photo
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The annoying thing there is because pulseaudio is becoming so ubiquitous, certain things are impossible to use without it.

One of those things is my enemy, Skype. sigh

And of course, this introduces the battle between things that /cant/ use pulse and the things that can /only/ use pulse.

And the former, if not configured right, can lock the sound card so pulse can't use it ...

For the former, there's a alsa hack to route things to pulse audio, avoiding the locking problem.....

But its so messy. And pulseaudio just sucks CPU cycles and memory too even when idle :(

It has a few benefits that are hard to get with alsa ( like per-input volume levels and software gain, and run-time routeable things )

But its still such a mess where all the alternatives suck differently.
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