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#apertus IRC Channel Logs

2014/11/03

Timezone: UTC


00:01
lab-bot
davidak created T124: monitor social networks for opinions about axiom. http://lab.apertus.org/T124
00:16
Rebelj12a
responded
00:20
__anton__
left the channel
00:22
jucar
joined the channel
00:25
Rebelj12a
Alright see you all later
00:25
Rebelj12a
left the channel
01:41
comradekingu
joined the channel
02:11
intracube
changed nick to: intracube_afk
02:25
Bertl
off to bed now ... have a good one everyone!
02:25
Bertl
changed nick to: Bertl_zZ
02:27
wescotte
left the channel
05:00
aombk2
joined the channel
05:03
aombk
left the channel
05:45
intracube_afk
left the channel
06:09
aombk3
joined the channel
06:12
aombk2
left the channel
08:05
intracube
joined the channel
08:36
sb0_
joined the channel
10:15
se6astian|away
changed nick to: se6astian
10:17
lab-bot
sebastian closed T113: CMV12000 PCB module progress as "Resolved". http://lab.apertus.org/T113
10:17
lab-bot
sebastian closed T114: Remote Control Simulator draft as "Resolved". http://lab.apertus.org/T114
10:19
Bertl_zZ
changed nick to: Bertl
10:19
Bertl
morning folks!
10:20
lab-bot
sebastian created T125: Create 3D printable enclosure mock of the AXIOM Remote Control device. http://lab.apertus.org/T125
10:21
se6astian
good morning!
10:28
mars_
morning
10:30
se6astian
Bertl: please take a look at the PCB design related questions/comments at https://www.apertus.org/axiom-beta-progress-article-november-2014
10:38
sb0_
left the channel
10:54
danieel
also more in my email
10:55
Bertl
you've got mail
10:56
danieel
would be good to do development only by 1 channel :) now you have to sync web, mail and lab...
10:56
danieel
probably all ends up in lab. ?
10:56
Bertl
at some point, yes
11:01
danieel
checked the power algo... the ov/uv -> en is sw or hw?
11:02
Bertl
probably hardware, but it could be a cpld
11:02
danieel
it would be not nice to allow sw destruction :/
11:02
Bertl
hehe, no, we plan to make that as safe as possible
11:02
Bertl
ideas there are also very welcome
11:03
danieel
then just a gate + load switch on the board... those are not on the sensor board?
11:05
Bertl
not planned on the sensor board, but it would be an option
11:05
Bertl
i.e. the beta board is planned to sequence the voltages, but the control circuitry prevents applying unsuitable voltages
11:10
Bertl
danieel: ah, I forgot to clarify about the resistor values, they have to be calculated according to the sensor specification, which we didn't do yet
11:12
Bertl
se6astian: the last comment on the web is probably more your area.
11:25
danieel
if you put the control circuit over 2 boards, make the logic in way that disconnection of the ov/uv lines leads to "fail" state
11:25
danieel
(connector failure)
11:26
se6astian
Bertl: will do
11:26
se6astian
maybe you can help me understand "developpement must reach its higher frequency and try to summarize like you just did in order to avoid getting away from the project targets." ?
11:26
Bertl
danieel: yes, thanks, they get weak pull ups on the ov/uv circuit, so a disconnect will cause ov/uv to go high (same for unused voltages)
11:27
Bertl
se6astian: I think this just says that short, bundled updates are a good thing (many different areas reported at once)
11:28
se6astian
I see
11:29
se6astian
gotta go
11:29
se6astian
bbl
11:29
se6astian
changed nick to: se6astian|away
11:29
Bertl
danieel: what we haven't solved properly yet is how to switch the voltage off on ov/uv without affecting the check voltage while keeping it accurate
11:30
Bertl
any ideas there are very welcome
11:31
danieel
like if there is a short behind the load switch? (en causes uv, and it gets repeatedly switched..?)
11:34
Bertl
yeah, I was thinking of a power regulator design which basically is a voltage follower
11:34
Bertl
i.e. provide the check voltage always
11:34
Bertl
and then power on the high current voltage follower if ov/uv is okay
11:35
Bertl
(which gets automatically disabled once the ov/uv condition appears)
11:54
__anton__
joined the channel
11:55
__anton__
Hi Bertl, quick question: apart from 36 diff pairs and 16 control signals what power connections does the interface board need? How many voltages?
11:57
Bertl
you are talking connection to the Beta board here, in which case it will be 8 voltages and 3*8 voltage control lines
11:57
Bertl
plus a few additional lines for I2C, SPI and JTAG
11:58
Bertl
I will upload an interface board design (empty) shortly
12:02
__anton__
72 wires for diff pairs + ground for power + 8 wires to feed 8 voltages + 16 wires to control the sensor + 24 wires to control voltages + a few extra?
12:03
Bertl
that's about it, we are planning to use dual 120+12 pin connectors between interface board and beta board
12:03
Bertl
those include the ground/power pins placed for shielding of course
12:24
__anton__
But amperage isnt that great on power lines is it?
12:44
Bertl
most voltages will be below 500mA, some have peaks around 2A but that should be mostly covered by decoupling
13:03
PhilCee
joined the channel
13:10
mraerino
joined the channel
13:11
mraerino
left the channel
13:24
g3gg0
joined the channel
13:27
Bertl
__anton__: http://vserver.13thfloor.at/Stuff/AXIOM/BETA/axiom_beta_interface_cmv12000_v0.3.pdf
13:37
__anton__
Bertl: thx, this gives me some idea. I am still going to show you my latest ideas on body design before midnight gmt today. Looks like they would require alternative interface and beta board designs as they rely on a diffetent type of connectors. I am still trying to figure out price and availability of those connectors
13:40
Bertl
note that if you do not care about bandwidth or space, you could split the interface board into two boards and have a low wire count connection between them
13:41
Bertl
you could also equip both boards with high speed serial interfaces and run the data over those
13:41
Bertl
(just some ideas)
13:42
__anton__
I plead time till midnight to finish research :)
13:54
__anton__
left the channel
14:04
aombk3
changed nick to: aombk
14:11
designbybeck_
joined the channel
14:17
se6astian|away
changed nick to: se6astian
14:30
__anton__
joined the channel
14:30
__anton__
Bertl: assuming our connection line is good (no reactive part in impedance) it is okay if some of the dignal pairs are slightly longer than others?
14:31
Bertl
define "some" :)
14:32
__anton__
We have 36 signal pairs. If their length is not identical is that okay?
14:33
Bertl
depends on the protocol we want to run over them, but assumed that the wires in a pair are identical in length, a fixed delay can usually be compensated
14:33
__anton__
Supposr the longest is 3cm longer than the shortest and the rest fall in between?
14:34
__anton__
So there is a delay..
14:34
Bertl
we can go up to 1.5GHz (rough estimate) on those lanes, so yes, the length is significant but could be compensated with a delay element
14:57
PhilCee
left the channel
16:15
Bertl
off for now ... bbl
16:15
Bertl
changed nick to: Bertl_oO
16:20
__anton__
left the channel
16:20
__anton__
joined the channel
17:34
se6astian
changed nick to: se6astian|away
17:46
Bertl_oO
changed nick to: Bertl
17:46
Bertl
back now ...
17:54
PhilCee
joined the channel
17:59
pizthewiz
joined the channel
18:01
PhilCee
left the channel
18:11
se6astian|away
changed nick to: se6astian
20:14
Rebelj12a
joined the channel
20:39
lab-bot
sebastian created T126: make dictator dials extend out of enclosure on the side. http://lab.apertus.org/T126
20:40
se6astian
changed nick to: se6astian|away
21:05
comradekingu
How about two slides along the length of the display, and the display actually reads what the result is, F 1 F4 F16
21:05
lab-bot
F4: http://lab.apertus.org/file/data/4wfrsa332ugvve3h6gai/PHID-FILE-bz6vpmzgnwg6jaals5bf/profile-philippe.jpg - profile-philippe.jpg
21:05
lab-bot
F16: http://lab.apertus.org/file/data/wxlfx5inh2y65pycs2zb/PHID-FILE-jhjr2ckk2mvfj4cis4uf/profile-github_-profile.jpg - profile-github_-profile.jpg
21:12
intracube
hi
21:12
intracube
have the M4/3 and 16mm sensor options been dropped?
21:13
intracube
remembers there was talk about focusing on the CMV12000 if the demand for the others was so low
21:14
Bertl
no, they haven't been dropped
21:14
intracube
Bertl: ah ok
21:14
Bertl
we just prioritize on the CMV12000
21:15
intracube
this page could do with updating sometime: https://apertus.org/axiom-beta
21:15
Bertl
in what regard?
21:15
intracube
only the cmv12000 is listed there
21:16
intracube
the indiegogo site has more up to date information
21:16
Bertl
ah, okay, yes, please crate (or extend) a task on the lab
21:16
intracube
ok :)
21:30
__anton__
left the channel
21:34
lab-bot
intracube created T127: Optical Low Pass Filter (OLPF) options. http://lab.apertus.org/T127
21:34
__anton__
joined the channel
21:35
skinkie_
se6astian|away: do you know who is neurofunk?
21:35
skinkie_
se6astian|away: aombk send me a private message
21:47
lab-bot
intracube created T128: Merge articles from Indiegogo to apertus.org. http://lab.apertus.org/T128
22:06
lab-bot
intracube created T129: Maniphest default page. http://lab.apertus.org/T129
22:15
comradekingu
intracube: that was just me talking. It could still make sense to see what the actual pricepoints are, and then offer m43 and 16mms to swap to aps-C
22:16
comradekingu
Current designs are made to be modular, so it does make sense to target more things though
22:19
designbybeck_
left the channel
22:19
intracube
comradekingu: yep
22:20
intracube
it might actually make sense to have at least two sensor options available
22:20
intracube
if there are any obscure hardware bugs it might help diagnose where the issue is
22:20
intracube
like if the bug only occurs with one of the sensors
22:21
intracube
a bit of diversity can help narrow down some issues
22:21
Rebelj12a
This could totally be modified to shoot 35mm film. haha
22:24
intracube
Rebelj12a: huh?
22:24
Bertl
I also think that it would be beneficial to have more than one sensor to allow for comparison in many ways
22:24
Rebelj12a
dont mind me im craaaaazy
22:24
intracube
Rebelj12a: http://media.giphy.com/media/jeXiz1RAvzX44/giphy.gif
22:24
intracube
:P
22:25
Rebelj12a
XD
23:06
lab-bot
davidak created T130: Images not loaded. http://lab.apertus.org/T130
23:29
g3gg0
left the channel
23:43
comradekingu
On the dictator, something like http://www.djworx.com/skratchworx/newspage.php?fn_mode=comments&fn_id=1186 is what i had in mind
23:44
comradekingu
I think they can be had with force feedback. The benefit is that you can instantly see where its at, whereas a wheel its not so obvious, even with a needle
23:44
comradekingu
and if handheld, i think its easier to do follow-focus with a slider