Joshua C. Johnson:
Documentation for Analog
Computer,
in this document, Mr. Johnson describes the design process and the
actual implementation of an analog computer together with some
introductory example problems, ca. 1.6 MB.
Die Funktionsgleichungen des digitalen Integrators,
Elektronische
Rechenanlagen, 10 (1968), Heft 5, S. 234-242 (thanks to
Rainer Glaschick for the scan and to DeGruyter Publishing for
their permission to offer this for download), ca. 1.6 MB
Über die Nachbildung von Getrieben auf dem Analogrechner,
Elektronische Rechenanlagen, 8 (1966), Heft 3, S. 125-130
(thanks to
Rainer Glaschick for the scan and to DeGruyter Publishing for
their permission to offer this for download), ca. 1 MB
Zur Steuerung von Analogrechenschaltungen, Elektronische
Rechenanlagen, 8 (1966), Heft 5, S. 219-225 (thanks to
Rainer Glaschick for the scan and to DeGruyter Publishing for
their permission to offer this for download), ca. 1.4 MB
Entwicklungstendenzen im hybriden Rechnen, Elektronische
Rechenanlagen, 10 (1968), Heft 1., S. 11-17 (thanks to
Rainer Glaschick for the scan and to DeGruyter Publishing for
their permission to offer this for download), ca. 1.5 MB
Der Transistorschalter im analogen Rechenkreis, Elektronische
Rechenanlagen, 8 (1966), Heft 4, S. 186-191 (thanks to
Rainer Glaschick for the scan and to DeGruyter Publishing for
their permission to offer this for download), ca. 1 MB
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.
Photos of an EAI function generator can be found
here.
06-APR-2015
The impressions section has been
expanded with new pictures and some user stories.
Probleme der Entwicklung
programmgesteuerter Rechengeräte und Integrieranlagen,
ca. 36 MB! This noteworthy publication not only contains chapter
written by Konrad Zuse but also (and more important from my analog
point of view :-) ) describes the so-called "Integromat", the last
electromechanical differential analyzer.
What is a Hybrid Computer
and Why - publication detailing on the hybrid computer
installation at the Control Engineering Department of Cambridge
University (thanks to Matthew Butler for this document), ca.
1 MB.
Thanks to Rainer Glaschick, we now have a second version of the
manual for the EA-22,
ca. 2.4 MB.
Thanks to Rainer Glaschick, we now also have the
Technische
Information for the EA-22, ca. 10 MB.
Rainer Glaschick provided the scans of the RAT 700
schematics,
ca. 6.2 MB.
Andre Masson describes the mechnical analog computers used for
anti-air guns in the time frame 1930-1945 in his paper
Mechanische
Analog-Computer für schwere Flab-Kanonen, ca. 5 MB. (I
would like to thank him for his permission to publish his work here.)
The publication Hilfsblätter
zum Praktikum Analogrechner give a short introduction into the
operation of the EAI MiniAC, ca. 7 MB (thanks to Rainer Glaschick
for this scan).
Description of a small electronic
Analog-Computer
built by VERO Electronics, ca. 20 MB.
Prof. Dr. W. Becker, the father of the wonderful
Dornier DO-80 described
the background of this development in the following
document (in German only).
Several new pictures in the
impressions section (EAI 380,
"General Purpose Simulator" used during the Saturn V-development, an
analog computer used for lunar landing simulations, and two pictures of
the EAI Starlight).
Some new pictures in the impressions
section (including a dual EAI 231RV installation by Mr. Graham Barton,
a picture of an Applied Dynamics analog computer and some more).
Dornier DO-80:
DO-80
overview drawings, ca. 8.7 MB
(donated by Prof. Dr. Becker, the designer of the DO-80 analog
computer).
Dornier DO-80:
Prof. Dr. W. Becker donated this set of hand drawn schematics of
the DO-80 prototype to the
Analogmuseum:
DO-80
prototype schematics, ca. 7.3 MB.
Dornier DO-80:
Prof. Dr. W. Becker donated this thesis in which the time delay
unit for the DO-80 analog computer is developed:
TOTZEITGLIED,
ca. 20 MB.
D. Bollen once published a wonderful series of articles describing
how to build a homebrew analog computer called
PEAC (thanks to Marc de
Piolenc for providing this wonderful scan), ca. 29 MB.
H. Webster:
Build your own Simple Analogue
Computer" (thanks to Marc de Piolenc for providing this scan),
ca. 2.4 MB.
Here is a paper
describing the Martin-Marietta Aerospace Simulation and Test Laboratory
(thanks to Marc de Piolenc for enhancing the scans and creating a
PDF file).
The 14th Edition dating from April 1986 of the
EAI User's Group
Newsletter (featuring Simstar etc.), ca. 24 MB.
Operating handbook for the
Telefunken RA 741
table top analog computer (thanks to Stefan Höltgen and
Johannes Maibaum for providing this scan) - ca. 9.3 MB.
Drawing of the patch panel
of the TR-48. (Thanks to Josh Bensadon for creating this drawing
and his permission to use it here.)
Drawing of the -8V / 2V power
supply of the TR-48. (Thanks to Josh Bensadon for creating this
drawing and his permission to use it here.)
SIMULATION
ACCELERATOR, a one page paper describing EAI's Starlight
system being used at NASA (thanks to Mr. John Douceur for this
document), ca. 100 kB.
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 page with analog computer impressions
has been extended by 38 additional photographs - enjoy. :-)
01-JAN-2011
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. :-)
13-OCT-2010
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:
27-SEP-2010
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):
22-SEP-2010
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:
EAI Maintenance Pocket
Guide - this small booklet (13 MB!) contains a wealth of
information helping the field engineering during repairs of EAI
analog computers. The most important part (at least for me) is
the section describing the integrated circuits used and the
list with transistor replacement types.
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).
17-JUN-2010
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.
07-JUN-2010
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.
01-MAR-2010
Andrew Fitch
developed a small electronic analog computer which is described on
his web page which is now linked to from the
Analogmuseum.
11-FEB-2010
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.
11-FEB-2010
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.
05-JAN-2010
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!).
03-JAN-2010
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.
27-DEC-2009
EAI 3440 DATAPLOTTER -
a publication describing the 3440 DATAPLOTTER (about 1.6 MB).
EAI HYDAC - a truly wonderful
six page publication describing the then new EAI HYDAC 2000 system
with wonderful pictures of the system (about 1.3 MB). In addition
to this there is a
letter from EAI to its
customers introducing the HYDAC system (in German, 162 kB).
EAI MICROSTORE Model
2.395 - a product information release introducing the PACE
MICROSTORE, a high-speed tracking, storage and switching device for
the EAI 231R series of analog computers (about 1 MB).
EAI Products and
Services - a short publication covering the main products and
services offerend by EAI (about 2.1 MB).
Dr. F. Vogel wrote a wonderful introduction to
analog computing
(in German) as well as a detailed description of his homebrew
analog computer
(in German). I am grateful for his work and his offer to make his
writings available here.
The page describing the Telefunken
RA 770 is now
available in German, too.
12-JUL-2009
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).
10-MAR-2009
On 27-MAY-2009, I will deliver a talk entitled "Think Different -
Think Analog" at the Kolloquium des Lehrstuhls Medientheorien
on the HU-Berlin. The slides for this talk can be downloaded from
here (ca. 700 kB).
10-MAR-2009
The page describing the simple ball simulator has been extended
and includes the mathematical background now as well as the complete
schematics of the circuit:
Ball simulator.
All examples pages of the german section are now available in
German.
22-DEC-2008
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.
21-DEC-2008
The german pages have been extended by the
Selbstbau section.
Stored Program
Concept for Analog Computers - this was prepared for the
George C. Marshall Space Flight Center, NASA in 1968 when they
requested a study to be performed by EAI whether some form of
automatic programming was possible for analog computers.
Hybrid
Computing At Lockheed - a truly wonderful brochure showing
the incredibly large hybrid computing facility in use a Lockheed
in the late 1960s. This system is the result of the request for
proposal shown above and consisted of four Comcor Ci5000
analog computers coupled to a Control Data 6400 system. The PDF
file is about 2.5 MB large.
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.
20-NOV-2008
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).
