The Experts below are selected from a list of 846 Experts worldwide ranked by ideXlab platform

E. C. Dalrymple-alford - One of the best experts on this subject based on the ideXlab platform.

William B. Cushman - One of the best experts on this subject based on the ideXlab platform.

  • A parallel Printer Port to matrix driver with high current DAC output
    Behavior Research Methods Instruments & Computers, 1993
    Co-Authors: William B. Cushman
    Abstract:

    The circuit described here takes data from an IBM PC, or a compatible, parallel Printer Port and expands it to drive a matrix of devices. The matrix size is user definable up to a maximum size of 16 by 16 elements (256 elements), but as drawn is an 8 by 24 matrix (196 elements). Each element in the matrix can be inductive, resistive, or capacitive, with a maximum voltage of about 18 volts, and a total maximum current of 15 amps peak, or 8 amps continuous with adequate heat sinks (dissipating 80 watts maximum per driver device). Several matrix elements may be asserted simultaneously. The voltage applied across the matrix “rails” is controlled by a digital-to-analog converter with 4096 steps (12-bit accuracy).

Michael R. Markham - One of the best experts on this subject based on the ideXlab platform.

David R. Paredes - One of the best experts on this subject based on the ideXlab platform.

  • Micromanaging time: Measuring and controlling timing errors in computer-controlled experiments
    Behavior Research Methods Instruments & Computers, 1990
    Co-Authors: Carl P. Creeger, Kevin F. Miller, David R. Paredes
    Abstract:

    Computer-controlled experiments present a number of potential sources of error in timing the presentation of events, including video refresh rate, keyboard scanning rate, and disk I/O times. A terminate-and-stay-resident routine implementing multiple millisecond-accuracy timers is presented. Interfaces permitting use of the timer with several higher level languages (C, FORTRAN , Pascal, and QuickBASIC) are described, as is a design for a two- to four-button response system using the computer’s Printer Port. A general strategy is described for using multiple timers to control and measure variation in critical experimental events. A C language program is provided to benchmark variation in the time required to perform common experimental tasks (screen refreshing, switching video pages, disk I/O, loop calculations), and results are summarized for several representative computers that use the IBM design.

Liu Xudong - One of the best experts on this subject based on the ideXlab platform.