Diatom Software
                  PO Box 262
                  Northfield, Ohio 44067
                  USA


    WHAT IS ELECTRONIC CIRCUIT DESIGNER?
    Through interactive programming technique Electronic Circuit
    Designer takes much of the tedium out of designing the more common
    electronic circuits.  The 62 programs that comprise Electronic
    Circuit Designer help the design engineer or technician play "What
    if?" with the design.  He can quickly substitute component values,
    change parameters and design specifications, and immediately see
    the effects.  Electronic Circuit Designer will free the technician
    to concentrate on the circuit design instead of studying reference
    tables and books of equations and entering numbers into a
    calculator.

    HOW TO RUN ELECTRONIC CIRCUIT DESIGNER
    To start the program, type "ECD" at the DOS prompt and press the
    "Enter" key.  The batch file ECD.BAT will run Electronic Circuit
    Designer from this disk.  Arrow keys and the "Enter" key select
    menu items.  The "Escape" key will return you to the main menu
    from anywhere in the program.  Numeric data enters from right to
    left, calculator style.  Zero and negative numbers are locked out
    of most entries to prevent errors.  Where negative numbers are
    allowed the sign shows to the right of the number.

    PROGRAM REQUIREMENTS
    This program requires color graphics and supports CGA and EGA
    graphics and can display on VGA equipped computers.  The program
    can be run from a floppy and requires 320k of free memory.

    DISCLAIMER
    This release of ECD may be freely distributed so long as this
    README file remains with the program and the program remains
    unaltered.  The author assumes no liability for the use or misuse
    of this program.

    ADVERTISEMENT
    Since the review in the May 1990 issue of Electronics World &
    Wireless World the program has undergone two major revisions.  The
    first upgrade moved the program to a compiled language and added
    EGA/VGA graphics support.  The current version 3.1 adds additional
    functions in basic electronics and communications.  Although the
    program is fully self documenting I have prepared a 22 page manual
    to further support the program.

    For a $25.00 registration fee plus shipping cost, the registered
    owner will receive the latest updated version of the program and
    manual.  All registered users will receive update notices of new
    releases.

    HISTORY
    I wrote the first version of this program for the TRS 80 about 5-6
    years ago.  Later when I upgraded to an IBM I rewrote the program
    (version 2) in GWBasic.  The program was for my personal use in
    deciphering other engineers circuit designs.  In 1987 I up-loaded
    the program to a local bulletin board hoping someone else might
    find it useful.

    Somehow the program found its way across the Atlantic where
    Electronics World & Wireless World magazine reviewed it.  I
    learned of the review when orders started to flow in.

    Encouraged by orders from around the world, I moved the program to
    Quick Basic 4.5.  The addition of support for EGA/VGA graphic and
    self documentation quickly followed.  Added functions in BASIC
    ELECTRONICS and COMMUNICATIONS are the latest enhancements in
    version 3.1.  I am currently working on the next version, soon to
    be released, adding functions suggested by letters from users.