They're tough for everyone :( But when coronavirus hit here in the UK, the museum had to close its doors to the public, and we lost practically all our income overnight.
No visitors, no workshops, no events, no school visits... no income. We know that things are tough for everyone right now, but if you can afford to help us through these tough times please donate what you can.
There's over 36,000 exhibits here! That should keep you occupied for a bit - get searching!
Or come and get involved on our social media channels ...
Analog Computer Techniques by Clarence L Johnson McGraw-Hill NY 1956; 264 pages, Index, diagrams, circuit diagrams, appendices
Contents -- Introduction - Historical Development; classification of computing equipment; problems solvable on the Electronic Analog Computer; Major components;
The Linear Computer Components -- the operational amplifiers; potentiometers; computer design differences;
Time- and Amplitude-scale Factors -- factors influencing the choice of time scale; determination of approximate problem frequencies; approx frequencies of higher-order systems; influence of recorder characteristics on the choice of time scale; performing the time-scale change; choice of amplitude-scale factor; approximating the magnitude of the variables of a problem;
The Synthesis of Servomechanism Systems -- the block-diagram notation; setup of a simple servomechanism system; setup of a transfer function; setup of the factored form of a transfer function; Multiplying and Resolving Servos; Additional Computer techniques; The Representation of Nonlinear Phenomena - differential relays and diodes; more;
Multipliers and Function Generators; Miscellaneous Applications of the Electronic Analog Computer;
Analog Computer Components and Computer Control -- stablized D-C Amplifiers; inherent erros of D-C amplifiers; Overload warning Systems; Boost; Operate-Reset Systems; Potentiometer-setting systems; Automatic Programming; The CHecking of Computer Results -- checking problem preparation; partial system checking; checking problem stability; specialized checking procedures; the role of the digital integrating differential analyzer in problem checking; a dynamic check of computer operations; accuracy and precision;
Repetitive Analog Computers -- advantages and disadvantages of repetitive computers; Philbrick Computer; Initial conditions; problem setup; trends in the design of repetitive computers;
The Digital Integrating Differential Analyzer -- historical development; design features of the newer digital integrating differential analyzers; operation of the digital integrating differential analyzer; the number system; communication between integrators; the coding diagram; Appendices
Since opening at the end of 2013, over 5,000 children have visited the Centre. These children deserve a space which is engaging and instructive, where they can feel a sense of adventure, exploration and surprise!
Please be assured that any amount you feel able to donate will make an immediate and significant impact.
Join our Mailing List by adding your email address below and be kept up to date with lots of information including: