What is new?

  • The restoration of the Donner 3000 analog computer is now completed.
  • A simple hybrid controller for electronic analog computers.
  • The museum got a wonderful donation from Rolf Englert - a special purpose analog computer which implements a pharmaco-kinetic model used in teaching pharmacology. This machine can be seen here.
  • Some photos of one the museum's EAI-180 table top analog computers can be found here.
  • Some photos of an EAI-1000 can be found here.
  • Photos of an EAI function generator can be found here.
  • A simple two-dimensional simulation of a spaceship.
  • There is now a new web site describing the ongoing restauration and repair of the unique Telefunken RA1: wird: http://www.telefunken-ra1.de (German only).
  • The introduction page now contains a link to a book about analog computers as well as an interesting chart showing how often the phrase "analog computer" was mentioned in books in the last 100 years. In addition to that it now contains a list of links to seven Youtube videos showing the operating principles of mechanical analog fire control computers. It also has been extended with a link to a newly developed harmonic analyzer which is featured in Make! :-)
  • The impressions page has been extended with a lot of pictures showing several EAI-231R(V) installations (most notably the installation at the DLR in Germany), an EAI PACE 16-31R, an EAI TR-48 with a PDP11 and Udo Knorrs so called "Fahrdiagraph" which is a mechanical differentical analyzer with feedback that even predates the machines developed by Vannevar Bush.
  • The library has been extended: A paper by Rubin, Analog/hybrid - What it was, what it is, what it may be", a brochure describing the Packard Bell HYCOMP system, the operations manual for the Hitachi 505 analog computer, an article about multiplication using a Wheatstone bridge, an article describing a VERY clever way of computing the length of a two element vector (found in an old issue of analog dialogue), 17 pages from the TELEFUNKEN ZEITUNG (issue 116, June 1957, Jg. 30) describing the unique RA 1, the EAI 680 scientific computing system - reference handbook.
  • The main page has been extended.
  • Arno Jacobs made wonderful circuit drawings for the orbital rendezvous example and the Lorenz attractor.
  • The page with analog computer impressions has been extended by 38 additional photographs - enjoy. :-)
  • Today I started to gather all of the various pictures of electronic analog computers that I collected during the last couple of years on a new page: Impressions.
  • TR-20 Computer Maintenance Series (63 MB!, many thanks to Dr. Entwistle for scanning the manual and giving the PDF file to the analog museum)
  • On December 10th, 2010, I delivered a talk The Power of Analogs at the Winterkolloquium of the institute for process control at the RWTH Aachen (the set of slides is quite large - 11 MB all in all).
  • Mr. Arno Jacobs developed a symbol library for the well known layout editor EAGLE which contains all symbols necessary to draw analog computer setups. The ZIP-file contains the library files as well as an example drawing showing a ball-in-the-box circuit. I would like to thank Mr. Jacobs cordially for this library and his permission to make it available at the analog computer museum.
  • Dr. Ralf Bülow found an interesting patent describing a completely analog golf simulator - a must read. :-)
  • I created a short video (about 5 minutes) showing the generation of a Joukowski airfoil and the simulation of flow lines around this profile. This video can be seen here:
  • A two part video film which shows the simulation of a somewhat more complex system, a two-mass-system representing a simple car suspension system. Especially interesting is the online grafic display which works purely analog and shows the moving road, car wheel set and the car frame (part 1 and part 2):

  • Yesterday I completed a short video clip demonstrating the use of an electronic analog computer for simulating a simple mechanical system. This 9 minute clip can be seen here:

  • Dr. Vogel built a tube based analog computer which is described here (German, 2.7 MB). A wealth of real programming examples using this wonderful homebrew computer can be found here (German, 1.8 MB).
  • The collection page has been updated and does now show most of the machines which are currently part of the collection of the analog computer museum.
  • The Frankfurter Rundschau (a large German newspaper) featured an article about the analog museum (and about me :-) ) which can be found here: Article
  • During the last couple of days I built the small analog computer designed by Dr. Vogel and documented my progress with quite some pictures and some remarks concerning necessary changes which were necessary since I could not get hold of some special parts. The description of this project may be found here.
  • Andrew Fitch developed a small electronic analog computer which is described on his web page which is now linked to from the Analogmuseum.
  • Since my conversion of Dr. Vogel's original Word documents describing his truly wonderful homebrew analog computer to PDF was erroneous and deleted the first page of the schematics, the two page schematics of his computer can be found here for download.
  • The peoples page now contains a link to Mark Titchener and his outstanding PERTECS which brings true analog computer feeling to a modern UNIX system.
  • In 1977 Dr. Vogel completed his dissertation about a genuine new resolver design without complicated diode networks. This is a very interesting approach and his thesis contains detailed schematics of his new resolver design. The thesis can be found here (about 17 MB!).
  • A couple of days ago I setup a simple circuit to display or plot the well known Lorenz attractor using a Telefunken RA 770 analog computer.
  • On July 9th, 2009, I had my final examination for my Ph.D. (the so called "Disputation") - the slides for my introductory talk can be found here (about 36 MB).
  • This weekend I built a rather simple simulator for a bouncing ball to be used for museum exhibitions and the like. Find more about this here.
06-MAR-2009 Thanks to Dave Burraston, the library has been extended by a couple of interesting publications regarding Comdyna analog computers:
  • All examples pages of the german section are now available in German.
  • The german pages now contain everything that may be found in the english sections. Six out of eight example pages are already translated, although the collection descriptions are sill in english only.
  • Thanks to my wife Rikka you can now download a 34 MB PDF-file describing a school analog computer made by the German manufacturer LEYBOLD-HERAEUS. This booklet also describes 150 programs and can be found here.
  • Not too long ago I delivered a talk about the development of the so called Mischgerät and the world's first electronic analog computer. These devices were conceived and implemented by Helmut Hoelzer while he was working in Peenemünde. The slides for this talk (about 1 MB) can be found here.
  • Not too long ago I gave a little talk at the University of Hamburg with the title "Faszination Analogrechnen". The slides for this talk are available for download here (ca. 1.6 MB).


04-SEP-2019, ulmann@analogmuseum.org