http://www.chaosgeordend.nl/mt-blog-cg/ Copyright 2012 Sun, 25 Dec 2011 22:12:51 +0100 http://www.movabletype.org/?v=3.12 http://blogs.law.harvard.edu/tech/rss A small Applescript application (.zip 445KB) to keep track of your car or motorbike usage in a Numbers spreadsheet. It shows a small pop-up to enter date, mileage, fuel and amount paid.... http://www.chaosgeordend.nl/mt-archives-cg/2009/05/mileage_script.html http://www.chaosgeordend.nl/mt-archives-cg/2009/05/mileage_script.html AppleScript Tue, 12 May 2009 22:09:57 +0100 Make engraved music sheets with Lilypond. A typical workflow to create a sheet looks like this: create a textdocument, e.g. myFirstSheet.ly, with texteditor; run Lilypond check the Postscript and, if any, Midi files if not ok, edit the textdocument... http://www.chaosgeordend.nl/mt-archives-cg/2009/05/lilypond.html http://www.chaosgeordend.nl/mt-archives-cg/2009/05/lilypond.html Music/Muziek Tue, 19 May 2009 21:25:46 +0100 In mei begonnen met muziek, dat wil zeggen noten leren lezen en blofluit spelen. Te beginnen met De Jonge Blokfluiter van James Arden. Een van de vele pseudoniemen waaronder Theo Ettema z'n lesboeken schreef. Inmiddels ook met bladmuziek in... http://www.chaosgeordend.nl/mt-archives-cg/2009/06/de_jonge_blokfl.html http://www.chaosgeordend.nl/mt-archives-cg/2009/06/de_jonge_blokfl.html Music/Muziek Sun, 07 Jun 2009 05:58:17 +0100 For the few who consider using a USB Digital Storage Oscilloscope on Mac OS X. The Voltcraft (i.e. Hantek) model 2090 DSO can be used on the Mac in combination with Oleg Khudyakov's HantekDSO (Linux) software.... http://www.chaosgeordend.nl/mt-archives-cg/2009/07/digital_storage.html http://www.chaosgeordend.nl/mt-archives-cg/2009/07/digital_storage.html Electronics/Electronica Wed, 01 Jul 2009 18:11:03 +0100 Now working on a small breakout board for the Nanotec microsteppercontroller. To be used in the RepRap 3D Printer. For those interested, you can download the Eagle files (.zip 291 KB) The parts-list you can find on Thingiverse.... http://www.chaosgeordend.nl/mt-archives-cg/2009/08/nanotec_stepper.html http://www.chaosgeordend.nl/mt-archives-cg/2009/08/nanotec_stepper.html Electronics/Electronica Sun, 02 Aug 2009 19:26:06 +0100 Voor het ontwikkelwerk aan de RepRap printerkop een draaibankje gekocht bij VDH in Utrecht. Wat handige links: Draaisnelheid berekenen Metrische schroefdraad afmetingen volgens ISO Mini lathe tuning Grinding your own lathe tools Tool bits ISO Passingstelsel... http://www.chaosgeordend.nl/mt-archives-cg/2009/09/draaibank.html http://www.chaosgeordend.nl/mt-archives-cg/2009/09/draaibank.html Lathe/Draaibank Fri, 25 Sep 2009 04:45:50 +0100 In november I ordered a MakerBot Cupcake printer, to have at least some results with a 3D Printer this year ;-) Last week the package arrived and this week I started assembling the MB body.... http://www.chaosgeordend.nl/mt-archives-cg/2009/12/3d_printer_1.html http://www.chaosgeordend.nl/mt-archives-cg/2009/12/3d_printer_1.html 3D Thu, 31 Dec 2009 19:09:15 +0100 My first, modest, steps in modeling the heaterbarrel of my RepRap 3D Printer. Starting with a 2D model. Not taking into account real-life stuff such as convection, radiation and other effects (I am probably not even aware of :-)... http://www.chaosgeordend.nl/mt-archives-cg/2010/02/finite_element.html http://www.chaosgeordend.nl/mt-archives-cg/2010/02/finite_element.html OSS Thu, 11 Feb 2010 18:59:00 +0100 Again the FEM study leads to unexpected interesting stuff, such as Sage, a wonderful Math package. If you want to explore Math and you are not (yet) prepared to buy Maple or Mathematica, start with Sage.... http://www.chaosgeordend.nl/mt-archives-cg/2010/09/formulas.html http://www.chaosgeordend.nl/mt-archives-cg/2010/09/formulas.html Math/Wiskunde Sat, 04 Sep 2010 08:26:31 +0100 Studying the Finite Element Method, I ran into a booklet with some math exercises. Just for the fun of finally using OOO formulas ;-), I created this OOO calc document for exercise 1.2. "Exploratory Examples - for Real Analysis", by... http://www.chaosgeordend.nl/mt-archives-cg/2010/09/formulas_in_ope.html http://www.chaosgeordend.nl/mt-archives-cg/2010/09/formulas_in_ope.html Math/Wiskunde Sun, 26 Sep 2010 07:04:59 +0100 Proof of concept, inspired by S. Baker's excellent simple 3D scanner article. Hardware turntable (geared stepper) videocamera (keycam) laserpointer and glass rod Software ImageMagick (ffmpeg etc.) c-scan scan-extract MakerScanner (cyclops?) Blender MeshLab Workflow scan movie convert to individual frames... http://www.chaosgeordend.nl/mt-archives-cg/2010/11/3d_scanner.html http://www.chaosgeordend.nl/mt-archives-cg/2010/11/3d_scanner.html 3D Tue, 02 Nov 2010 11:05:21 +0100 the Finite Element Method, its basis & fundamentals, O.C. Zienkiewicz, R.L. Taylor, J.Z. Zhu, 6th edition ISBN 0-7506-6320-0.... http://www.chaosgeordend.nl/mt-archives-cg/2011/06/fem_oc_zienkiew.html http://www.chaosgeordend.nl/mt-archives-cg/2011/06/fem_oc_zienkiew.html FEM Mon, 06 Jun 2011 10:48:35 +0100 To enable wake-on-LAN over the Internet, the open hardware platform Arduino is used. Not all routers support wake-on-LAN from the Internet to LAN. This depends on whether you can configure the ARP cache and send or forward a WOL broadcast... http://www.chaosgeordend.nl/mt-archives-cg/2011/08/wake_on_lan.html http://www.chaosgeordend.nl/mt-archives-cg/2011/08/wake_on_lan.html Electronics/Electronica Tue, 02 Aug 2011 11:32:50 +0100 For a project that involved dozens of print pages to be saved as textdocuments, I used the Tesseract OCR program together with the Netpbm library. Here's what the three step workflow looks like.... http://www.chaosgeordend.nl/mt-archives-cg/2011/12/a_textscanning_1.html http://www.chaosgeordend.nl/mt-archives-cg/2011/12/a_textscanning_1.html OSS Fri, 02 Dec 2011 22:20:03 +0100 Another find of the FEM study is Octave, a great Math package. Octave is a reimplementation of part of Matlab developed by Professor John Eaton at the University of Texas, Austin, and later at the University of Wisconsin, Madison.... http://www.chaosgeordend.nl/mt-archives-cg/2011/12/an_open_source_1.html http://www.chaosgeordend.nl/mt-archives-cg/2011/12/an_open_source_1.html Math/Wiskunde Sun, 25 Dec 2011 22:12:51 +0100