sudo-discuss

sudo-discuss@sudoroom.org

6 participants
7255 discussions

DXF or SVG or? for scanner light fixture mount cutting for book scanner

by jacques revera

I just purchased two refurbished 20 megapixel Canon PowerShot ELPH 160 and the archivist lighting assembly which includes LED bulbs, sockets, lenses, wiring and power adapter. Jonathon will send us the design files for the sockets mounting plate soon as I tell him what format we need to cut it at the SUDO room: DXF or SVG or something else? ~ http://diybookscanner.org/archivist/index6ea9.html?page_id=267 This is the page describing the plate. It would be convenient if the SUDO room has some FR4 but as long as the material is opaque, heat proof and can be painted black, should be no problem. This plate will sit at the top center of the scanner. The plate also serves to block light from entering from the top direction. Since, we need to attach something to raise the lights higher than the original hackerspace design, we should not cut this out yet. It does not need to be the same shape as the archivist plate as long as the socket mounting holes are the same. Jonathon wrote last week: ."..you can move the lights further away from the platen. Because of various design constraints, Daniel put the lights closer to the platen than is ideal on that model. For later models (like Daniel's Archivist design), the lights were been moved further away to reduce glare and hot spots. You want to reproduce this in some way. So just build a simple frame you can set on top of the scanner to lift the lights. There is a mathematical way to find the minimum distance, but it might be easiest just to do it empirically, pulling the lights away and taking sample photos until you see that there is no reflected light source." You can see how this the lights are put together on the archivist about halfway down this page http://diybookscanner.org/archivist/index9bef.html?page_id=54 Jacques

6 years, 11 months

Re: [sudo-discuss] vending machine homing switch mystery solved

by Jake

bump! does anyone want to help get one or both vending machines working? This would be a great way to vend arduinos, ESP8266's, candy bars, and whatever else we want to sell to sudoers and others. Much of the work has already been done. -jake ---------- Forwarded message ---------- > Date: Sat, 9 Apr 2016 17:42:06 -0500 > From: jake(a)spaz.org > Subject: [sudo-discuss] vending machine homing switch mystery solved > > 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.jpg > http://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 > _______________________________________________ > sudo-discuss mailing list > sudo-discuss(a)lists.sudoroom.org > https://sudoroom.org/lists/listinfo/sudo-discuss

6 years, 11 months

I read the Articles of Association

by Captain Chesapeake

Hi all, I'm a new member. I'm excited to be a part of this community. There are great people and great resources in the space. I've also noticed that is kind of disorganized, cluttered, and the organization is broke! As a medium to long term goal I think it would be great to gain financial solvency and be able to start saving for larger projects as well as clean up the space and make it an amazing workspace with lots of working tools, spare parts, and workspace. I reviewed the articles of association and noticed a few roles that were not apparent to me in the meetings I've attended. For me the first goal of implementing change is identifying the leadership and working with them to build a consensus. Is there an existing facilitator, scribe, exchequer, and conflict steward? Thanks, David

6 years, 11 months

Today's NB Privacy Hackathon: 7-10pm (come to RIOTcon in Oakland right before!)

by Steve Phillips

Hey there privacy hackers, The weekly privacy hackathons hosted at Noisebridge via the Cypherpunks Write Code <https://www.meetup.com/Cypherpunks-Write-Code/> meetup group are generally 4-10pm, but *tomorrow* (Saturday) it is *7pm to 10pm* (at Noisebridge). This is because of RIOTcon <https://riotcon.github.io/>, which I'm speaking at: RIOTcon (Radical Interactive Open Technology Conference) is a new > conference seeking to highlight the intersections between radicalism, art, > and technology. RIOTcon is from 11am till 5pm. My talk is at noon, and I'll be staying for the entire event before heading to Noisebridge for the CWC hackathon. More details about RIOTcon, including talk descriptions/summaries/abstracts: https://www.facebook.com/ events/2014315468855418/ I hope to see you all at the conference and/or the hackathon! --Steve P.S. *Of course* my talk is about Pursuance <https://pursuanceproject.org/> !

6 years, 12 months

Stripe Subscriptions

by Kyle Mitchell

Following on from the finances discussion during last week's meeting... On manual review of our Stripe account, I see 36 monthly recurring dues subscriptions through sudo-humans for a total of $1,290 per month. There were a handful of accounts with failing transactions. (This tends to happen when a card expires or a number changes.) However, those accounts probably add up to <$100 per month altogether. If we expect, say, $1,200 per month actually paid, and our sole bill is to Omni, for $2,000, we are running an $800 shortfall. $800 over 30 people is $27 per. $800 over 15 people is $54 per. I've just updated my plan accordingly. As I recall, one of the big open questions from the meeting was whether Sudo pays any other recurring bills. We know we have insurance, and use utilities. It wasn't clear whether those are billed through Omni, and covered by the $2,000 per month, or not.

6 years, 12 months

Fwd: Plumbing work next Thursday 1/25 - NO WATER

by Yardena Cohen

FYI ---------- Forwarded message ---------- From: Yardena Cohen <yardenack(a)gmail.com> Date: Thu, Jan 18, 2018 at 2:04 PM Subject: Plumbing work next Thursday 1/25 - NO WATER To: discuss <discuss(a)lists.omnicommons.org> Our plumber will be doing repairs in Omni's wheelchair bathroom next Thursday, January 25th, starting around 10am. We'll probably have to turn off the water lines to the whole building for at least part of the time. Thanks for understanding.

6 years, 12 months

TAZ 3D printer needs a heating resistor

by Jake

our black TAZ "3" 3D printer doesn't work partially because its hotend resistor is burned out. Its hotend is a "Budaschnozzle 2.0" Here's a link to the nozzle: https://www.lulzbot.com/support/budaschnozzle-20 this is the parts list: http://download.lulzbot.com/Budaschnozzle/v2.0/Budaschnozzle_2.0_0.35noz_re… the part we need is: [ PC-RE0007 ] Heat Resistor, 4.7 Ohm this seems to be the sale page for replacement resistors: https://www.lulzbot.com/store/parts/heat-resistor but we can probably find one lying around, and maybe someone has thermally conductive epoxy for gluing one in? -jake

6 years, 12 months

Treasure or trash?

by Ed Biow

Folks, a crony gave me a 6+1 DVD duplicator and a couple of external firewire DVD-RW burners, plus a laptop cooler pad dealer (see attached picture). Maybe we could use the duplicator to burner videos of an event in the ballroom for quick distribution. I have a few spools of DVD-RWs I could throw at it. Otherwise this stuff just goes in my e-cycling pile, though I have to say it does make a pretty cool electronic samurai sculpture in my living room. https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Delectronics&fiel… Edlardo -- +++++++++++++++++++++++++++++++++++++++++++ If God is watching us the least we can do is be entertaining. Edmund Joseph Biow 328 Haddon Road Oakland, California 94606 (510) 763-0591 (try first, messages checked in morning, dumb phone, no caller ID, leave number) (415) 623-6473 (cell) biow(a)sonic.net - biow(a)riseup.net - ejbiow(a)gmail.com - ebiow(a)yasashi.net To subscribe or unsubscribe to the lists I manage send an email to the following: Subscribe: occupyoakland-subscribe(a)lists.riseup.net oaklandprivacyworkinggroup-subscribe(a)lists.riseup.net civilizethecops-subscribe(a)lists.riseup.net occupyoaklandkitchen-subscribe(a)lists.riseup.net infomedusa-subscribe(a)lists.riseup.net Unsubscribe: occupyoakland-unsubscribe(a)lists.riseup.net oaklandprivacyworkinggroup-unsubscribe(a)lists.riseup.net civilizethecops-unsubscribe(a)lists.riseup.net occupyoaklandkitchen-unsubscribe(a)lists.riseup.net infomedusa-unsubscribe(a)lists.riseup.net (\__/) .~ ~. )) /O O ./ .' {O__, \ { / . . ) \ |-| '-' \ } )) Warning: squirrels. .( _( )_.' '---.~_ _ _& You can use a PGP key to encrypt and secure our messages. To start using it, you'll need to install an OpenPGP software on your computer. Below you'll find a list of possible solutions for your operating system: Windows: Kleopatra (http://gpg4win.de/download.html)Linux: GnuPG (https://www.gnupg.org/download/supported_systems.html) OS X: GPG Keychain (https://gpgtools.org/#gpgsuite) Linux: GnuPG (https://www.gnupg.org/related_software/frontends.html) Android: OpenKeychain (https://play.google.com/store/apps/details?id=org.sufficientlysecure.keycha…) iOS: iPGMail (https://itunes.apple.com/us/app/ipgmail/id430780873?mt=8) Once you set up PGP on your computer please import my public key into your local OpenPGP Key-Manager. The valid PGP keys for my biow(a)cubasoldarity.net & biow(a)riseup.net accounts can be downloaded here: http://ebiow.yasashi.net/pgp/ An "easy" way to set up PGP on your computer is to download the free & open sources Thunderbird email client (available on Linux, Windohs & O$X) & install the EnigMail Add-On. https://www.mozilla.org/en-US/thunderbird/all.html https://www.enigmail.net/download/ https://www.enigmail.net/documentation/quickstart-ch1.php Looking forward to exchange snooping-free messages with you & making the NSA spend mondo bucks to discover the secret of my bube's kartofel kugel recipe.

6 years, 12 months

Removing bogus wordpress users

by Charley Sheets

Hi everyone, I am removing bogus-looking wordpress users, subject to my own discretion as to bogosity. One such account has the username part of the email address as "gcjrminsgbkbwbacdega". That kind of thing. If any real user finds that their wordpress account stops working, I apologize. Should that happen, please request a new account. Thanks for understanding. -- Charley

7 years

SUDO room scanner light replacement discussion thread

by jacques revera

https://forum.diybookscanner.org/viewtopic.php?f=16&t=3477 Jonathon Duerig (I believe he took over much from Daniel Reetz) responded that we have a 'hackerspace' model scanner and offered some advice. I asked if we could buy the "lighting system" parts of a 'quill' model and if it would be feasible to mount on our 'hackerspace' model. The logic is well put here http://diybookscanner.org/archivist/index322f.html?page_id=459 beginning with the sentence "Lighting for scanners is incredibly difficult to do right. " Check back there for the reply

7 years

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