<whitequark>
just seen that. not all hope is lost, it seems
<wpwrak>
(small speaker) what if you leave both ends open ?
<whitequark>
oooh, DocScrutinizer05 finally confirmed transfer of funds to neo900 UG
<whitequark>
I started worrying already
<dos1>
that was me actually, on his behalf ;) and well, Nikolaus is still far from being done with all transfers
<dos1>
so you were lucky that yours was processed at the beginning ;)
<whitequark>
I see. still good
<wpwrak>
(tesla) i couldn't have said it better myself :)
<wpwrak>
dos1: maybe a refund status update on tmo couldn't hurt, to spread the word
<wpwrak>
i.e., that about half of the things have been processed at all, that it takes a while for things to actually make it through the system, and then some more time before the transfer is manually processed and an ack is sent
<wpwrak>
to join three points with lines, you pick a fourth point "in the middle", then draw from each point to that middle point. that minimizes the length of the lines.
<wpwrak>
generalize for N points :)
<whitequark>
down, yes
<whitequark>
maybe I hit a different path in the load balancer
<wpwrak>
of course, in a pcb you won't calculate those exact points but approximate the routing to what a steiner tree would look like
<whitequark>
I didn't really route it to minimize the trace length
<wpwrak>
maybe putin found an article on homosexuality :)
<whitequark>
I routed it to satisfy my obsession, mainly
<wpwrak>
hehe :)
<whitequark>
(putin) no way, I put openvpn on my router like months ago
<whitequark>
so everything goes through UK.
<whitequark>
and yes, that happened (not literally that but similar accidents)
<whitequark>
they would've not affected me, though, because my ISP plain out ignores federal law
<whitequark>
fun, eh?
<wpwrak>
well, short traces are usually desirable: less can go wrong when etching, less unintentional emission, less undesired immission, less resistive loss, typically less in-circuit interference, etc.
<whitequark>
I don't accept any etching that isn't perfect
<whitequark>
otherwise, yeah, generally correct, but absolutely pointless for this circuit
<whitequark>
wait, immission?
<whitequark>
immission (plural immissions)
<whitequark>
The act of immitting
<wpwrak>
you should set up another vpn that sends it to .au and then to .us, in case the're changing tapes in the uk when your packets fly by :)
<wpwrak>
"n.1.The act of immitting, or of sending or thrusting in; injection; - the correlative of emission."
<whitequark>
ah, you mean, it wouldn't catch rf
<wpwrak>
or other noise
<wpwrak>
there can also be very bad things at very low frequencies :)
<whitequark>
hmmmm, for example?
<wpwrak>
people in the downstairs lab experimenting with large coils :)
<whitequark>
wouldn't it require a really huge trace?
<whitequark>
like, pcb antennas only really work for >=dozens of mhz
<wpwrak>
we had that happen once at university. a sun kept on crashing. field services replaced every single bit of the machine, but even with just the case still in place, it still crashed. i suggested we ask them to send an exorcist instead of a technician.
<wpwrak>
well, one fine day our sysadmin had lunch with the folks from the lab below us. they told him of their cool new experiment. that experiment happened to be precisely below that machine. 1 m to the side and you wouldn't have problems.
<wpwrak>
oh, anything can mess with your stuff. it's not "all or nothing". e.g., that sun probably was just being pushed the tiniest bit over the edge. a few percent less and it would probably have worked perfectly.
* whitequark
sighs
<whitequark>
I disassembled this chinese UV led flashlight. a fine piece of #yoloengineering
<whitequark>
no current regulation whatsoever
<wpwrak>
why would it need one ?
<wpwrak>
UV LED fail. you buys new UV LED. everyone happy.
lamrz has quit [Quit: Leaving]
jekhor has joined #qi-hardware
wej_ has joined #qi-hardware
wej has quit [Ping timeout: 252 seconds]
<whitequark>
hmmm
<whitequark>
I don't get it. somehow this stuff doesn't work.
<whitequark>
I've connected a pair of LEDs to the outputs on the control board, and they light up just fine
<whitequark>
but when I connect my relay board, which I have tested independently and established that it works fine, too, extremely odd behavior happens
<whitequark>
when I enable (i.e. set high) output 1, relay 1 triggers. when I enable output 2, relays 1 and 2 trigger.
<whitequark>
wtf?!
wolfspra1l has quit [Ping timeout: 240 seconds]
wolfspraul has joined #qi-hardware
dandon has joined #qi-hardware
jekhor has quit [Ping timeout: 244 seconds]
<whitequark>
I'm starting to think it would be easier to use an optocoupler there
<whitequark>
... which is the case for which it's clearly been designed
<whitequark>
sigh.
pcercuei has joined #qi-hardware
pcercuei has quit [Client Quit]
pcercuei_ has joined #qi-hardware
BerryHalsak has joined #qi-hardware
BerryHalsak has quit [Remote host closed the connection]
<DocScrutinizer05>
astr: I can't answer your question since there are no datasheets. However it *looks* like both speakers have a chamber with aperture, which generally needs further considerations what "to do" with the air/sound coming out of such aperture
<DocScrutinizer05>
seems like that oval 20*30mm 5mm thick speakers are widely used, maybe in a popular tablet or laptop or whatever. You should try to find either the datasheet of the speaker or the device it's used in and then copy what those devices' designers did. They are supposed to (but not guaranteed to) have had consultations with the speaker manufacturer or at least got detailed datasheets for the speaker
<DocScrutinizer05>
odds are that those speakers are actually meant to get mounted to baffle, which in practice means you glue the speaker to wall of case behind an aperture that the sound escapes from case, and backside of speaker (with "chamber") is "open" to the inside of device and has no further acoustic elements attached
<DocScrutinizer05>
when you can get a sample of such speaker, there are test procedures to acquire its Q, F(0) etc parameters, and then calculate the performance in various mounting variants by using tools like the mathcad sheets from quarter-wave site
<DocScrutinizer05>
generally building a good speaker is really difficult and not only depends on buying a transducer of matching size and "good quality"
pcercuei has quit [Ping timeout: 240 seconds]
pcercueiS2 has joined #qi-hardware
jekhor has quit [Ping timeout: 272 seconds]
pcercuei has joined #qi-hardware
pcercueiS2 has quit [Quit: Yaaic - Yet another Android IRC client - http://www.yaaic.org]
pcercuei has quit [Ping timeout: 240 seconds]
<astr>
DocScrutinizer05: I wonder if I can just buy an existing thing and hack out the speaker + chamber (+ amp?). I can't face spending days working out how to make one.
zrafa has joined #qi-hardware
<DocScrutinizer05>
that's exactly what I'd suggest. Amp is dead simple. The speaker is a standard 8..32Ohm and any semi-matching amp can drive it
<DocScrutinizer05>
ask if you want to know about my notion regarding possible small tweaks to chamber geometry, you _can_ do some bending and folding to it without changing acoustic properties much
rz2k has joined #qi-hardware
wolfspraul has quit [Ping timeout: 240 seconds]
wolfspraul has joined #qi-hardware
<astr>
DocScrutinizer05: I'd like to know
<DocScrutinizer05>
I meant you can ask me about particular changes you plan to apply to a copied design, and if I hink they can work