Analog and Hybrid Computer Programming, 2nd Edition

G A simple joystick interface

Since an analog computer is ideally suited for all kinds of dynamic systems simulations, a joystick interface is a really versatile peripheral device as it makes “man in the loop” simulations possible. This appendix describes a simple adapter circuit which allows a two-channel analog joystick, as commonly used for controlling models, to be used with an analog computer.

The joystick used here is a two-channel joystick from an old model remote control. It consists of two 4k7 (4700 Ω) potentiometers – one for the x- and one for the y-direction. A simple handheld enclosure was built, as shown on the left in figure G.2. This also holds a push button which can be used to control an electronic switch or a comparator ...