Noisebridge - User contributions [en]

PsychedelicSF

2012-02-26T08:39:16Z

199.83.222.45: I don't like long and around

== About ==
Our group is devoted to the exploration of the expansion of consciousness – and we’re fascinated and thrilled as we learn about the profound role psychedelics have played in the evolution of human consciousness over the past tens of thousands of years. It’s awesome.

We work to create safe spaces to foster discussion and community between consciousness seekers: psychologists, artists, philosophers, hippies, makers, scientists . . . I hope you can join us at a future meetup.

We discuss the work of such luminaries as Hofmann, McKenna, Pinchbeck, Abraham, Grey, Sheldrake, Leary, Grof, Lilly, the Shulgins and so much more.

Our group doesn't engage in or promote illegal activities during our Meetups. Don't join our group to get "hooked up" because you'll be removed if that's your intention. We are a mature, safe group.

== Links ==
* [http://www.PsychedelicSF.org Homepage]
* [http://www.facebook.com/PsychedelicSF Facebook Page]
* [http://www.twitter.com/PsychedelicSF Twitter]

== Upcoming Events ==
*14:00-17:00: '''2012-03-04''': [[PsychedelicSF]] lecture about [[PsychedelicSF/2012-03-04|Ayahuasca in a Global Context]]

Anthology

2012-02-26T08:38:04Z

199.83.222.45: I hate sex

The creators of [[zine|ZiP]], a Noisebridge Zine-in-Progress, would like to compile an anthology of people recounting their first time at Noisebridge: how and when they were introduced to the space.

''Noise in Print: Your First Time'' (working title).

Deadline for submissions: TBA

Projected completion date: TBA

We're envisioning ''Noise in Print'' as a blanket title for a whole series of anthologies or Noisebridge-related publishing projects of which ''Your First Time'' will be the catalyst.

Email '''zipzine-at-riseup.net''' for more info or to collaborate on this project. We welcome collaboration on all Noisebridge-related projects.

Excellence

2012-02-26T08:14:23Z

199.83.222.45: Not lulzy

This page exists to to provide an insight into our shifting morass of community standards. These principles and standards are not the [[Consensus]] of Noisebridge, and anyone can edit this page at any time. Hopefully, the community can ensure that this page continues to reflect what we think.

The only hard and fast rule of Noisebridge is '''be excellent to each other'''. Everything else is ''dicta''.

= Purpose =

* Noisebridge is a place for hacking, hackers, and learning to hack.
* Noisebridge operates by do-ocracy and consensus.
* The [[Noisebridge Vision]] describes what we are for, and what we are about.

= Disagreement =

* If you disagree with your fellow hacker it would be excellent to [[Conflict Resolution | work out your differences]] with them.
* If you cannot work out your differences one-on-one, it would be excellent to work out your differences through [[mediation]].

= Entrance and Membership =

* You do not need to be a member to hack at Noisebridge or participate in the community here.
* It is not excellent to admit someone to Noisebridge unless you are willing to take responsibility for their actions here.
* It is not excellent to use the resources of Noisebridge unless you are hacking or trying to actively participate in the community

= Conflict and Emergency =

* It is excellent to do-ocratically remove someone who is disrupting Noisebridge, or dangerous.
** If you remove someone like this, you should email [[mailinglist|noisebridge-discuss]], and edit [[85]].
** If someone is removed from the space like this, they shouldn't return to the space except to work out the issue that resulted in their removal, either through [[mediation]], or at a [[Meetings | weekly meeting]].

= Do Not Want =

* [[Sleeping | Noisebridge is your hackerspace not your home]]. Do not live here.

= Why Publish These Standards =

It is important for regular users of the space to be aware of the purpose of Noisebridge. If people want to use the space and have no interest in or respect for hacking, this does not mean they are automatically unwelcome at Noisebridge, but they should thoroughly understand that their use of the space is tangential to its purpose and at the discretion of the membership and other stakeholders.

SEM

2012-02-15T02:11:18Z

199.83.222.45: /* The Scanning Electron Microscope at Noisebridge. */

= The Scanning Electron Microscope at Noisebridge. =

* "TV Mini-SEM (R)" by ISI (International Scientific Instruments)
* lives in the room that used to house the laser cutter
* is tended by Mike Kan, Alan Rockefeller, Chris and Jim and the rest of the [https://www.noisebridge.net/mailman/listinfo/sem SEM mailing list]

=== Warnings ===
# If you release the vacuum without venting the pump hose, pump oil will flood the chamber and contaminate the entire mechanism, requiring 10 hours of cleanup.
# If you vent air into the column without powering down the filament, you'll probably destroy the filament ($100).

=== Startup procedures ===
# Get the power cord from Mike.
# See PDFs on vacuum start up and operators manual linked below.

=== Todo list ===
Short Term:
# Isolate vibration from external sources; buses, people, etc. See Repair and Enhancement notes below. (2010-12-12)
# Create/obtain specimen stage clamp or spring to prevent specimen vibration. (2010-12-12)
# Obtain some sputter coated specimens. (2010-12-12)

Long Term:
# Column liner needs to be replaced. Larry may be able to provide a clean liner. (2010-06-15) (update: Larry has taken column liner to his lab for cleaning)
# Build digital capture stage to replace CRT mechanism (2010-06-15)
# Replace 8.4" slow scan CRT with slow scan XGA LCD? (see above)
# Build sputter coater for specimen preparation (2010-06-15)
# Test repair of X Stigmator circuit. Replaced 741 op amp. (completed, work began 2010-11-20, tested 2010-12-10)
# Adjust vertical overscan of CRT (completed 2010-12-12, including hack sawing access port to overscan potentiometers in the CRT module)
# Fix 2x magnification toggle switch (2010-12-12)
# Diagnose and repair barrel distortion and occlusion at low magnification (2010-12-12)
# Sew dust cover (2010-12-12)
# Rubber grommet around edge of CRT potentiometer port needed

=== Repair and Enhancement Notes===
* Before repair, disable pumps and high voltage then put it into operation mode by placing a magnet on the operation relay.
* schematics framed behind SEM are to a similar, potentially slightly more modern model
* poorly designed wire harness may cause linear op amp and transistor on the J1 board of the power module to fail.
* camera mounting stage and bellows hood for slow-scan exposure. Proposed (2010-06-15), Completed by Mike, Miloh, and Chris (2010-11-06)
* CRT V. scan, V bias, H. frequency potentiometers are located on the underside of the CRT module.
* broken stigmator Y lock tab is in altoids tin in SEM kit box.

How to mitigate vibration:
# Measure and pinpoint vibration sources
# Dampen vibration from the rough pump-line by one of these methods: routing it through a concrete block and adding a hose extension, sandbag the existing line, or utilize water as a mass.
# Hang the column from the ceiling with bungee cord and platform
# Potentially relocate the microscope to the server room to diminish dust and increase distance from Mission St.
# Create spring clamping specimen slug to keep the specimen from moving.

=== Specifications ===
* Made in Japan
* Delivered in September, 1975
* magnifies up to 20,000x
* outputs to a CRT
* non-digital, non-NTSC, non-PAL, analog output signal

=== Documentation ===
[[Media: Vacuum_System_Operating_Instructions.pdf]] - How to start the pump

[[Media: ISI_Mini-TV_SEM_Manual-Troubleshooting-Reference_Guide.pdf]] - How to use and fix the SEM

[[Media: Specimen_Stage_Service_Request.pdf]] - Why the rotating stage is broken

[[Media: Cards.pdf]] - Historic docs

[[Media: Other_Docs.pdf]] - Repair notes

[[Media: Packing_Lists.pdf]] - Original Packing Lists, the contents of the shipping crate

=== Schematics ===

Overall schematics for the TV MINI-SEM (Model: MRS-2-2 WN76-7-01). These schematics are for a model of SEM that is perhaps newer than than the SEM at Noisebridge. It is still an invaluable reference to the technician. Note: This schematic is a mosaic of 9 images stitched together with [http://hugin.sourceforge.net/ Hugin 2010.2.0]. Some minor alignment issues exist in the content of the schematic. I think alignment can be guessed/interpreted accurately. Available in:
[[Media: TV_MINI-SEM_Schematics-Overall_MRS-2-2_WN76-7-01_Mosaic_v._1.0_Low-Res.jpg | LOW RES 1.5MB (4330 x 3109, posterized grayscale, JPEG)]] and
[[Media: TV_MINI-SEM_Schematics-Overall_MRS-2-2_WN76-7-01_Mosaic_v._1.0.jpg | HIGH RES 8MB (8680 x 6217, color, JPEG)]].

[[Media: Schematic_of_Photomultiplier.pdf‎]]

[[Media: Polaron_Pirani_Schematics-PE_Pir-SW_Issue_4_E5000.pdf]] - Polaron Pirani sputter coater schematics

[[Media: Polaron_Pirani_Gauge_Head_for_Sputter_Coater.pdf]]

=== Specimen Images ===

<gallery widths=200px heights=166px>
Image:IMG_0004.jpg|Image of mechanical pencil graphite smudge on an aluminum slug at approximately 20x magnification. The specimen is about 1 mm across. This is prior to repairing the X Stigmator. Magnification was limited. Imaged by Chris Murphy and Mike Kan.

Image:IMG_0652.jpg|Mechanical pencil graphite smudge on aluminum slug. 1000x magnification. This is post repair of X Stigmator. Imaged by the Noisebridge SEM. Mike Kan, Chris Murphy.

Image:IMG_0655.jpg| Tip of mechanical pencil graphite on aluminum slug. 500x magnification. This is post repair of X Stigmator. Imaged by the Noisebridge SEM. Mike Kan, Chris Murphy.

Image:IMG_0654.jpg| Tip of mechanical pencil graphite on aluminum slug. 1000x magnification. This is post repair of X Stigmator. Imaged by the Noisebridge SEM. Mike Kan, Chris Murphy.

Image:IMG_0656.jpg| Tip of mechanical pencil graphite on aluminum slug. 5000x magnification. This is post repair of X Stigmator. Imaged by the Noisebridge SEM. Mike Kan, Chris Murphy.

Image:IMG_0657.jpg| Tip of mechanical pencil graphite on aluminum slug. 10,000x magnification. This is post repair of X Stigmator. Specimen was moving on the slug due to mechanical vibration. Imaged by the Noisebridge SEM. Mike Kan, Chris Murphy.

Image:IMG_0624.jpg|Semiconductor ball grid array at 20x magnification prior to repairing the X Stigmator. Mike Kan, Chris Murphy

Image:IMG_0649.jpg|Snapped metal region of a box cutter razor blade. Imaged on the Noisebridge SEM. About 5000x magnification. This is post repair of X Stigmator. Mike Kan, Chris Murphy

Image:IMG_0007.jpg|Head of a small 2mm allen type machine screw. Less than 1000x magnification. This is post repair of X Stigmator. Mike Kan, Chris Murphy

Image:Allen_close_up.jpg|Head of a small 2mm allen type machine screw. About 1000x magnification. This is post repair of X Stigmator. Mike Kan, Chris Murphy

Image:IMG_0026.jpg|Diatom imaged in fast scan mode (lower resolution than slow scan photo mode). Magnification unrecorded. Mike Kan, Chris Murphy. 12/12/10

</gallery>