Posts by author roh

28C3 and Raumfahrtagentur

Yes, Berlin's hacker-space, the Raumfahrtagentur - not only focused on hardware-hacking, is open during 28C3. We decided not to move every maschine to bcc, so you are invited to join us. Between our laser-cutter, RepRap and audio-studio, a Volxküche (public-kitchen), a bar (including Chunk and MateMartini) and a projector for streaming is waiting for everyone interested.

We try to achieve 24/7 availability - but don't hesistate to contact us first.

For details check the wiki events/28c3PeaceMission?

  • Posted: 2011-12-26 19:42 (Updated: 2011-12-27 04:42)
  • Author: roh
  • Categories: public
  • Comments (0)

Acryllic Milkymist One Case

since lasering an early prototype in plywood for the Milkymist One interactive VJ Station i've been busy:

adding labels, modifying the mechanical concept and sourcing some really nice looking acrylic materials, as well as some metal spacers.

i just finished the first complete acryllic one and it looks really neat.

actually its much more wine-red than the cam photo.

according to i think the correct color is: 'purple, plum, magenta, maroon'

i got it labeled as'violet, transparent'.

the next one will be something more blue.

if everything goes as planned, i will have some of these on the 27C3.

please contact me* before, if you already know you want one, so i can plan ahead.

ps: do you want wooden ones as well?

* = send mail to

usb buttonbox in wood

this is a 'usb keyboard' with 16 buttons

made with vim, avr, qcad and gcc :)

heekscad heekscam 0.14.1svn ubuntu packages /chrome/site/flattrbutton.png

after quite some absence, i've revisited heekcad.

not only due to public demand here at raumfahrtagentur, but also due to the still existing problem of 'using different cad tools will do weird things with my files' - i rebuilt heekscad and heekscnc and its libs.

what changed in the last half year?

  • pycam got replaced by opencam.
  • loads of bugs fixed (seemingly, feels more solid)
  • new features with new bugs added :)
  • a ton of stuff i havent mentioned..

the packages seems to work for me so far, please test and report your experiences.

these are packages for ubuntu karmic (9.10) x86

and for ubuntu lucid (10.04) x86

if you don't know heekscad, take a look at the nice new website

updated: added packages for lucid

the agency now got a physical flattrbutton


first it there suddenly was a stencil...

... and then the leftovers made for a nice real-world flattrbutton :)

kuechenradio 271 - Raumfahrtagentur

vorhin war hier das kuechenradio zu besuch und hat gismo, frank und betty ausfuehrlichst interviewt.

es gab auch einen ausflug zu elektronenrad, sektrausch und DocPhil war ne runde elektronenrad fahren :)

ganze sendung auf kuechenradio271

fanless cisco

heute wurde das geraet (eine cisco 2950) 'gewartet'.

*pust* *hust* *geplatztenelkotausch* und die chips mit kleinen selbstklebenden sowie einem

groesseren rastenden kuehlkoerper versehen. daher ist der switch jetzt voellig fan und soundlos. :)


die system led bleibt ohne fan gelb.


dank Bild2(am rand) aus


(sowie der erkenntniss das bei cisco auf dem fan anschluss gnd und vcc vertauscht sind)

hat sich zusammen mit 2x10k (R1, R3), 1x47k (R2), 2x 100nF (C1, C2) und einem ne555

(2, einer verstarb dank cisco-pinout) ein schaltkreis ergeben, welcher einen 12V fan

fuer die cisco glaubhaft simuliert. die system led wird also gruen.

sollte generell auch fuer andere geraete funktionieren. der ne555 kann bis zu 18V ab und

schaltet mit ~54% tastverhaeltniss bei 140-150hz pin3 zwischen high und low.

bilder gips spaeter


im falle des bedarfs, die prenzlauer rauf, kurz vor dem planetarium rechts rein.

im gegensatz zu schwabenstreichen wie homöopatie haben sie dort auch echte ärtze.

machen auch schicke fotos.

first blood

its lazzoring!

the machine still needs some more alignment. some parts were not lasered through completely and needed some work with the cutter to come out.

put it on thingieverse, gismo!


updated heekscad and heekscnc ubuntu packages

since quite some codechanges happend in the last few months, i built some fresh ubuntu packages.

since we don't have any 8.10 and 9.04 boxes around anymore i will only do 8.04 and 9.10 builds from now on.

get them from

in case you haven't heard of heekscad, take a look

the plugin for generating a cnc toolpath is called heekscnc

  • Posted: 2009-11-20 06:23 (Updated: 2011-12-26 18:51)
  • Author: roh
  • Categories: cnc public
  • Comments (0)


one more sensor:

a true spindle-speed rpm meter, which measures the 'is' and not only displays the 'should'

more details in the wiki: Maschinen/CncFräse/SpindleMeter

  • Posted: 2009-11-18 09:13 (Updated: 2011-12-26 18:52)
  • Author: roh
  • Categories: cnc public
  • Comments (0)

werners conductive probe

this is a video from our fellow hacker werner in argentina who added conductive probing and crash-avoidance to his mill.

  • Posted: 2009-06-20 13:43 (Updated: 2009-06-20 13:48)
  • Author: roh
  • Categories: cnc public
  • Comments (0)

Metall frame Extruder

weight: 1.2 kg

material: white ptfe, green hdpe, 10mm thick aluminium

motor: RB35 (conrad) dc brushed motor with 600:1 gear, 10rpm, 70-100mA @ 12V

RepRap Progress

neu: Jog-Box fuer manuelles feinsteppen der fraese


aufgrund des vorhandenseins von guenstigen endlosencodern in der sammlung und der flexibilitiaet von emc2 hal gibt es jetzt feed-override, spindle-override, einen gelben fuer die stepsize und 3 axen zum 'elektronisch direkt anfassen'

die axen pots sind default disabled. dafuer gibts das haeckchen fuer jog rechts in der ui von emc2

  • Posted: 2009-06-17 07:19 (Updated: 2009-06-17 12:15)
  • Author: roh
  • Categories: cnc public
  • Comments (0)