does anyone know what's wrong with the wooden Type A Machines 3d printer?
i can't get it to respond anything sensible, and i've tried several
baudrates; 115200 230400 and 250000
sometimes it gives some gibberish, but mostly it says nothing.
the TAZ lulzbot 3d printer seems to be missing the fan and fan shroud from
the print head. Does anyone know where it went or what happened to it?
also, it needs a software update, does anyone care if i do this?
does anyone want to help get this printer going?
The Omni's insurance company is upset because people are sitting on the
steps outside of the ballroom entrance drinking beer. We have tried talking
to them but they're not being cooperative.
Since it's an emergency exit we can't make it hard to sit on the steps
without also blocking the exit.
So! Taking a queue from the Copenhagen main train station me and Robb have
set up a system that constantly plays loud dramatic atonal symphony music
from the other side of the door.
Unfortunately we don't have any powered speakers that are quire loud enough
If you have any < 12" powered speakers that you'd like to donate to this
endavour, please bring them by :)
For the technically curious:
It's a cheap Western Digital N750 router running openwrt with a usb stick
full of mp3s, a usb audio interface and some desktop computer speakers.
Feel free to add music but ensure that they are mp3 format. Just turn it
off before unplugging the usb stick. It will automatically start playing
all mp3s on the stick when it boots.
We had the idea that it would be really useful if we could blast it only
when people sit there, so if we had a camera that could specifically only
see the steps and then allowed sudo/omni members to tune in and blast music
when someone is sitting there, that would be nice.
We are composing Omni's first newsletter! This will be digitally and
physically distributed, ideally next week.
As you read this message, please think of a few possible contributions:
announcements about recent and upcoming events; updates on ongoing
projects; opportunities for newbs to learn more about your
collective/working group; requests for volunteers and collaborators; photos
and video links - really, the more hodgepodge and diverse, the more it will
suitably represent the Omni :)
It would be great to have this newsletter ready in time for the anarchist
bookfair, so please send the thing asap, before Friday if possible!
Please reply to this thread or send a message to comms(a)lists.omnicommons.org
Help open a people-powered common space in Oakland, California!
"Technology is the campfire around which we tell our stories."
"Storytelling reveals meaning without committing the error of defining it."
"To define is to kill. To suggest is to create."
for you, jake
for me, it's just begun
On Sun, Apr 10, 2016 at 3:34 AM, <sudo-discuss-request(a)lists.sudoroom.org>
> Send sudo-discuss mailing list submissions to
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> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of sudo-discuss digest..."
> Today's Topics:
> 1. Re: Robogames (Patrik D'haeseleer)
> 2. Re: oscilloscope, power supply, signal generator "donation" (Jake)
> 3. Re: oscilloscope, power supply, signal generator "donation"
> (Anthony Di Franco)
> 4. Re: oscilloscope, power supply, signal generator "donation" (Zach)
> 5. Re: Robogames (Cere Misc)
> 6. dell server racks? (robb)
> 7. Re: dell server racks? (Jake)
> 8. Re: dell server racks? (robb)
> 9. Re: dell server racks? (Morgan Allen)
> 10. Schedule change and update from last meeting/hacknight and
> (Marc Juul)
> 11. Re: dell server racks? (danarauz(a)gmail.com)
> 12. Re: dell server racks? (Marc Juul)
> 13. vending machine homing switch mystery solved (Jake)
> 14. Re: vending machine homing switch mystery solved (Mitch Altman)
> 15. Re: Schedule change and update from last meeting/hacknight
> and (Jenny Ryan)
> 16. Re: vending machine homing switch mystery solved (Jake)
> 17. Re: vending machine homing switch mystery solved (Mitch Altman)
> Message: 1
> Date: Fri, 8 Apr 2016 00:19:17 -0700
> From: "Patrik D'haeseleer" <patrikd(a)gmail.com>
> To: Tracy Jacobs <kinetical(a)comcast.net>
> Cc: Sudo room <sudo-discuss(a)lists.sudoroom.org>
> Subject: Re: [sudo-discuss] Robogames
> Content-Type: text/plain; charset="utf-8"
> Yeah, both days are fun. You sometimes get some of the more spectacular
> displays of destruction on Saturday. And by Sunday, many of the bots have
> some amount of damage accumulated, or might be more focused on making it
> into the finals than on putting up a show.
> Either way, really entertaining both days. And some top-notch driving and
> engineering skills on display.
> On Thu, Apr 7, 2016 at 11:30 PM, Tracy Jacobs <kinetical(a)comcast.net>
> > Either one, it’s always good. You should go if you haven’t been! Tracy
> > On Apr 7, 2016, at 9:47 PM, Adam <adam(a)aperture.systems> wrote:
> > > I'm not sure what day is the best one to go. If it's structured like
> > > FRC matches, day 1 may not be too spectacular.
> > > - - - - Begin automatically generated footer - - - -
> > >
> > > Director of Research, Aperture Systems: http://aperture.systems
> > > Weblog: http://www.adammunich.com
> > > Cell: +1-650-452-0554, M-F 10a - 8p PST
> > >
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> > >
> > >
> > > On Thu, Apr 7, 2016 at 9:45 PM, Tracy Jacobs <kinetical(a)comcast.net>
> > wrote:
> > >> Is it in Livermore this year?
> > >> I’d recommend it, I have been many times, normally as a participant.
> > They have a robotic art section of the competition too!
> > >>
> > >> Tracy
> > >> On Apr 7, 2016, at 7:58 PM, Adam <adam(a)aperture.systems> wrote:
> > >>
> > >>> Is this weekend in livermore.
> > >>>
> > >>> I'm considering going. Tickets are $30/day, but it may be worth it to
> > >>> see robots get smashed and go through varied challenges.
> > >>>
> > >>> Anyone else?
> > >>>
> > >>>
> > >>>
> > >>> - - - - Begin automatically generated footer - - - -
> > >>>
> > >>> Director of Research, Aperture Systems: http://aperture.systems
> > >>> Weblog: http://www.adammunich.com
> > >>> Cell: +1-650-452-0554, M-F 10a - 8p PST
> > >>>
> > >>> Note: To protect against computer viruses, e-mail programs may
> > >>> sending or receiving certain types of file attachments. Check your
> > >>> e-mail security settings to determine how attachments are handled.
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> > >>> the sender. If you are not the intended recipient, you are hereby
> > >>> notified that any disclosure, use, copying, distribution, or the
> > >>> taking of any action in reliance on the contents of this information
> > >>> is strictly prohibited. If you have received this transmission in
> > >>> error, please notify the sender immediately by e-mail and delete the
> > >>> original message. Thank you for your cooperation.
> > >>> _______________________________________________
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> > >>
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so i've been working on the black sudoroom vending machine (vending1):
which had previously been hacked by students at UC Berkeley (i think)
I believe it's a Snacktron like Emma and Ed's machine.
(unlike our brown vending machine which is a snackshop II)
pictures of their machine can be seen here:
they had ripped out the original control unit, and wired it up with a
bunch of reed relays and an arduino. The motors of the vending machine
are wired as a grid of rows and columns, so the controller needs to be
able to enable a single row and column in order to power one product
But it also needs to be able to detect when the product motor has rotated
a full turn, and is back at the "home" position where it needs to stop.
There's a "home" sensor on the back of the motor, but the way it's wired
was a mystery for a while. Here's some pictures of the homing circuit:
as you can see, the only difference between the button being pressed or
not pressed, is that the 420nF capacitor is in parallel with the motor or
not. Since the whole thing is in series with a diode (to protect against
trying to turn a motor backwards) we were stumped as to how to detect
whether a motor was homed or not.
Thanks to Zach who donated some test equipment including this awesome
signal generator (along with a nice power supply and bench multimeter):
I was able to connect an AC waveform in series with a 12VDC supply to one
of the motors, and figure out how to detect whether the home switch is
closed or not. Basically, you make a 31KHz (or similar frequency)
squarewave in series with the power supply, and watch the current through
the motor. If the button is open and the capacitor is not in-circuit, the
motor's inductance absorbs the AC and the current draw is relatively
smooth. But when the motor arrives at the home position (when you need to
stop delivering product!) the capacitor gets switched in, and now you'll
see a lot of the AC on the current path of the system.
Here is a video showing the voltage across a 22-ohm series resistor while
the motor is rotating with 12VDC:
apparently it takes that motor about 11 seconds to dispense a product and
finish returning to home position, assuming the product weighs nothing.
by the way, you'll notice that i'm using the old analog oscilloscope.
Unfortunately the LeCroy 9510 has started crashing, basically
bluescreening. It probably needs to be opened up and cleaned, as it got
wet after a fire before it was donated to sudoroom.
Or maybe someone wants to donate a nicer oscilloscope to sudoroom?
anyway, now I know how to detect the motor homing signal, and I just need
to wire up this machine to its arduino to detect the signal and dispense
product more accurately. If anyone wants to help, please let me know.
by the way, if you are wondering how the UC students detected when the
motors were finished dispensing product, the answer is absurd:
they put a laser beam across the path where product would fall when
dispensed, and they watched for the laser beam to be interrupted.
did it work? I don't know. probably the semester ended and they got
their grade and moved on, and then they donated the vending machine to us.
Unless someone complains I'm dropping the Thursday evening events for now.
That means that we have one weekly meeting only: Tuesday at 7:30 pm.
Last meeting I was planning to prototype a 12v power cable. A couple of new
meshers showed up though. I'm sure these won't be people who show up once
and then never again since one is already an active sudo'er and the other
is a ccl'er. I ended up intro-ing them to the mesh. One of them should be
able to tie intro existing mesh connections in west oakland but needed
approval from housemates, the other person has a view of lake merritt and
he took a home node and picostation extender back with him :)
Next Tuesday I want to try to solder those cables and we need to design a
sticker that annotates what each port on the home node is used for so we
don't have to manually make little notes/stickers every time.
thx for the speedy response, jake!
how many do we want?
On Fri, Apr 8, 2016 at 4:31 PM, Jake <jake(a)spaz.org> wrote:
> On Fri, 8 Apr 2016, robb wrote:
> guy came to sudo asking if we want any dell server racks.
>> he. claims they are nicer than the ones we have.
>> he has 10