for you, jake
for me, it's just begun
~r
On Sun, Apr 10, 2016 at 3:34 AM, <sudo-discuss-request(a)lists.sudoroom.org>
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> 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
> Message-ID:
> <
> CAKOjizPyC85-NLv35CUaoKaV8qiSWr7JjT7+ki3pucHCYhqeyA(a)mail.gmail.com>
> 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.
>
> Patrik
>
> On Thu, Apr 7, 2016 at 11:30 PM, Tracy Jacobs <kinetical(a)comcast.net>
> wrote:
>
> > 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
> > >
> > > Note: To protect against computer viruses, e-mail programs may prevent
> > > sending or receiving certain types of file attachments. Check your
> > > e-mail security settings to determine how attachments are handled.
> > >
> > > Confidentiality Notice: This electronic mail transmission is intended
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> > > original message. Thank you for your cooperation.
> > >
> > >
> > > 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
> prevent
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> > >>> 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):
https://sudoroom.org/wiki/hack-o-mat
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:
http://spaz.org/~jake/pix/vend/
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
motor.
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:
http://spaz.org/~jake/pix/vend/IMG_20160401_015211.jpghttp://spaz.org/~jake/pix/vend/IMG_20160401_015700.jpg
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):
http://imgur.com/LTSFfOe
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:
https://www.youtube.com/watch?v=xHIGDw5HRCg
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.
-jake
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.
--
marc/juul
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:
> nooooooo
>
>
> 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
>> cheers
>> ~r
>>
>>
>>
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 prevent
sending or receiving certain types of file attachments. Check your
e-mail security settings to determine how attachments are handled.
Confidentiality Notice: This electronic mail transmission is intended
for the use of the individual or entity to which it is addressed and
may contain confidential and/or proprietary information belonging to
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.
Im going to hold on to the scope for now. Have fun with the bench supply and other gear.
-Zach
--------------------------------------------
On Fri, 4/8/16, Jake <jake(a)spaz.org> wrote:
Subject: Re: [sudo-discuss] oscilloscope, power supply, signal generator "donation"
To: "Anthony Di Franco" <di.franco(a)gmail.com>
Cc: sudo-discuss(a)lists.sudoroom.org, "Zach T" <organic_unity(a)yahoo.com>, jacobmowbray(a)gmail.com
Date: Friday, April 8, 2016, 12:24 PM
Thanks Anthony!
Why not the oscilloscope?Â
Not enough room? Perhaps Jacob can pick it up,
I think he was going to pick it all up himself
originally.
That
oscilloscope apparently has some 16-line digital analyzer
built in,
could be really awesome.
-jake
On Fri, 8 Apr 2016, Anthony Di Franco wrote:
> I got everything except
the oscilloscope,[IMAGE]
>
>
It's on the back bench.
>
> On Thu, Apr 7, 2016, 13:53 Jake <jake(a)spaz.org>
wrote:
>Â Â Â Â Â Zach wants to
donate these nice pieces of test equipment to sudoroom:
>
>Â Â Â Â Â http://imgur.com/wZuPmi2
>Â Â Â Â Â http://imgur.com/LTSFfOe
>Â Â Â Â Â http://imgur.com/oQQsfgc
>
>Â Â
   and Jacob M. has volunteered to go pick them
up (although he doesn't have
>Â Â
   a car and they're in SF)
>
>Â Â
   Does anyone with a car want to go to SF to
pick them up?
>
>Â Â
   but Zach wants to know that he can get them
back whenever he wants.
>
>Â Â Â Â Â Zach, Sudoroom
can't guarantee the safety of your equipment that is
left
>     there. But I
can say that my LeCroy 9150 and Sorensen DCR-2025B and
lots
>Â Â Â Â Â of other good
stuff are there and i'm not worried about them, and
you
>Â Â Â Â Â shouldn't
worry either. If you ever need to come get these things
back
>Â Â Â Â Â you can do
so. We appreciate you letting us use them in the
meantime.
>
>Â Â
   -jake
>Â Â
   _______________________________________________
>Â Â Â Â Â sudo-discuss mailing
list
>Â Â Â Â Â sudo-discuss(a)lists.sudoroom.org
>Â Â Â Â Â https://sudoroom.org/lists/listinfo/sudo-discuss
>
>
>
Zach wants to donate these nice pieces of test equipment to sudoroom:
http://imgur.com/wZuPmi2http://imgur.com/LTSFfOehttp://imgur.com/oQQsfgc
and Jacob M. has volunteered to go pick them up (although he doesn't have
a car and they're in SF)
Does anyone with a car want to go to SF to pick them up?
but Zach wants to know that he can get them back whenever he wants.
Zach, Sudoroom can't guarantee the safety of your equipment that is left
there. But I can say that my LeCroy 9150 and Sorensen DCR-2025B and lots
of other good stuff are there and i'm not worried about them, and you
shouldn't worry either. If you ever need to come get these things back
you can do so. We appreciate you letting us use them in the meantime.
-jake
they are beautiful!!! we can always use another power supply & multimeter &
i expect the function genie will come in handy when we start tuning tesla
coils :P
On Thu, Apr 7, 2016 at 4:47 PM, <sudo-discuss-request(a)lists.sudoroom.org>
wrote:
> Send sudo-discuss mailing list submissions to
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> You can reach the person managing the list at
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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: March emails? (Cere Misc)
> 2. Re: mailman backlog (robb)
> 3. Re: hello all (Jake)
> 4. Re: mailman backlog (Jake)
> 5. Re: March emails? (mark M)
> 6. Re: vote for Omni for the Oakland Indie awards (mark M)
> 7. Re: sonic modem refunded (Maximilian Klein)
> 8. Important meeting this wednesday! (Marc Juul)
> 9. voip phone calls (Jake)
> 10. O P D S T A T E D I N T E N T: '... to SHUT DOWN THE OMNI due
> to the "hacking activities"...'?!!? (johanna faust)
> 11. Re: O P D S T A T E D I N T E N T: '... to SHUT DOWN THE OMNI
> due to the "hacking activities"...'?!!? (Marc Juul)
> 12. Re: Important meeting this wednesday! (Jenny Ryan)
> 13. Re: Important meeting this wednesday! (Marc Juul)
> 14. Re: need M8 bolts for robot (Lesley Bell)
> 15. No More Meetings — Only Parties Instead!!! (Matt Senate)
> 16. Re: No More Meetings — Only Parties Instead!!! (Jake)
> 17. Re: No More Meetings — Only Parties Instead!!! (robb)
> 18. Re: No More Meetings — Only Parties Instead!!! (Marc Juul)
> 19. Re: No More Meetings — Only Parties Instead!!! (Marina Kukso)
> 20. oscilloscope, power supply, signal generator "donation" (Jake)
> 21. Re: [CCLmembers] Fwd: oscilloscope, power supply, signal
> generator "donation" (Cere Misc)
> 22. Re: oscilloscope, power supply, signal generator "donation" (Zach)
> 23. Re: oscilloscope, power supply, signal generator "donation"
> (Jacob Mowbray)
> 24. Re: oscilloscope, power supply, signal generator "donation"
> (Anthony Di Franco)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 3 Apr 2016 23:17:40 -0700
> From: Cere Misc <cere.misc(a)gmail.com>
> To: "Patrik D'haeseleer" <patrikd(a)gmail.com>
> Cc: sudo-discuss <sudo-discuss(a)lists.sudoroom.org>
> Subject: Re: [sudo-discuss] March emails?
> Message-ID:
> <CAKtSE-v1W=
> b7CFZCdY4qKCskraTisr+9ZK0mkh2rkU4BkT06fg(a)mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Yes. Me too. I think someone approved a bunch of emails from ppl that had
> sent them in under email addrs that weren't subscribed (such as mine).
>
> On Sun, Apr 3, 2016 at 10:02 PM, Patrik D'haeseleer <patrikd(a)gmail.com>
> wrote:
>
> > Odd - Over the past half hour, I've been getting dozens of sudo-discuss
> > emails from the month of March. Anyone else seeing this?
> >
> > Just wondering whether this logjam was on my end, or sudo-discuss...
> >
> > Patrik
> >
> > _______________________________________________
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> > sudo-discuss(a)lists.sudoroom.org
> > https://sudoroom.org/lists/listinfo/sudo-discuss
> >
> >
>
