Difference between revisions of "Regular Member Meeting 2013 09 10"

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== Member Reports ==
== Member Reports ==
* antennas
* marine corp marathon
* DSO Nano v3 fail
* DIY laptop - core components are in
Hope my reports aren't getting too long...
Hope my reports aren't getting too long...

Revision as of 13:24, 10 September 2013

Time and Location

September 10, 2013
Called to order at ____ by ____.
Members present:
Others present:
Quorum met?

Approval of Previous Meeting's Minutes

Regular Member Meeting 2013 08 13


Director Reports

President's Report

ISC Grant is completed. See Project Byzantium report.

Silver Spring Mini Maker Faire is coming up. Please plan to attend and show off what you're working on.

Speaking of Faires, it's Renn Fest season.

What's going on with the Crypto Party? Can we get that on the calendar and start promoting?

Vice President's Report

Treasurer's Report

Here is the financial summary spreadsheet for August 2013: File:HacDC Financials 2013 08.pdf. We gained Ann Millspaugh, Evan Phillips, Jarett DeAngelis, Kay Kenworthy, Brendan Levy, as new, paying members. No members left, though one will be on hiatus until January.

Project Awesome

Thanks to fewer delinquent members and an unexpected grant from the Community Foundation for Northern Virginia, we had a healthy surplus this month, so I am declaring a $1000 Project Awesome dividend, which leaves us with $1,481.74 to add to our unearmarked reserves. Here is the Project Awesome spreadsheet for August: File:HacDC PA Projects-2013 08.pdf. There are currently 15 votes.

Secretary's Report

Director-at-Large Reports

Shawn Nock


Project Awesome Reports

Project LASER





  • Credit to Dan Barlow, $300 parts obtained for $18, amazing find!
  • 600V, 200A, ~1MHz switching speed.
  • Stored in blue bucket on parts store shelves. Recommended donation of at least $100, prefer to see them used in equipment available to HacDC members.
PLA Solvent (Tetrahydrofuran)
  • Manually polish or glue PLA printed parts with just few drops.
  • Small glass bottle, stored inside metal tin on chemical shelf.
  • Generally safe as acetone. However, seal tight to minimize oxidization, and wear nitrile gloves.
Solder Paste
  • Professional quality SMT soldering by the thousand. Recommend laser cutting blue tape for stencils and hot air gun for soldering. See http://www.youtube.com/watch?v=qyDRHI4YeMI .
  • Stored in fridge, ideally at 10C, for vastly extended shelf life. Not food.
  • Toxic, like all solder dust. Minimize contamination, wash hands thoroughly after use.
PCB Milling Bit
  • Maximum quality circuit boards, 5 mil diameter.
  • Stored in toolbox.
  • Tough when spinning, fragile when not.

Future Plans

  • Spare hot-end for Prusa Mendel.
  • Large plastic buckets.


Member Reports


  • antennas
  • marine corp marathon
  • DSO Nano v3 fail
  • DIY laptop - core components are in


Hope my reports aren't getting too long...

General Use Computer

New computer in front room set up for general web browsing, google hangout hosting, etc.



Still going well, still plan to give details later.

Biosignal Amplifier

New headgear tested, using earplug "sponges" instead of pin headers. Comfortable, works well, even through thick hair.


Would like to have more shelves at HacDC. We are now accumulating considerable quantities of non-junk on floors, such as:

  • Working computers, monitors, photo frames networking gear, WiFi antennas, etc.
  • Stationery, CDs, floppies.
  • Books.
  • Laser/Mill stock.
  • Microscopes, lasers, lenses, slides, etc.
  • Audio gear.
  • Radios.


Giant Fresnel Lenses - Craiglist Expedition for Rear Projection TV


Calling any volunteers to pick up five of these, and deliver them to HacDC for tear-down.

Rear projection TVs, available freely on Craigslist, are now the only known source of the five Fresnel lenses we require. Project is stalled until we get these lenses.

Final Cost Estimate

$128.97 Includes metal-halide light source, projection lens, and condenser lenses. Does not include LCD (which we probably have) or Fresnel lenses (which we probably can't buy).


Optical experiments and design complete. Published, with CAD models, as OpenDisplay.



Old Business

New Business

New Members