FERRITE.COM User's Guide
Copyright (c) 1986 by Scott R. Grabowski
All Rights Reserved
This program package consists of the following files: FERRITE.DOC,
FERRITE.COM, and CHART1.TXT. The FERRITE.COM program calculates the
inductance of windings placed on an iron-powder toroidal core.
Inductance versus turns data is presented in tabular format on the
screen and may be printed, if the printing option is selected. The
files FERRITE.DOC and CHART1.TXT are text files that provide on-line
documentation and a reference chart of maximum windings that can be
wound on the core.
The FERRITE.COM program package is distributed as User-Supported
Software; consequently, even though it is copyrighted, it may be
copied and distributed without restriction providing that: both the
program and documentation files are distributed together as a
package, neither is modified, and no fee is charged for the package.
System requirements for FERRITE.COM are an IBM Personal Computer or
compatible computer system using either a monochrome or color display
and operating in the PC-DOS 2.0, or higher, environment.
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At the DOS prompt, type IRON
series of screen prompts will appear to assist you in entering the
The part number field may be used to identify the size and mixture or
type of core; for example, a typical entry might be "T-50-2",
indicating a toroidal core one-half inch in diameter of mixture 2.
The wire size field may be used to identify the size (American Wire
Gauge) of the wire used for winding. This data is not used in the
calculation of inductance; however, keep in mind that the maximum
number of turns that can be physically wound on a core is affected by
the wire diameter. If a general table of inductance is being
prepared, the response "Any" or simply a
this field. Refer to the file CHART1.TXT for the maximum number of
turns that can be accommodated on different size forms for the
various AWG wire sizes.
For convenience, a printed copy of the chart can be obtained by using
the DOS commands; for example, TYPE CHART1.TXT >PRN.
The uH/100-T field is the permeability of the core expressed in
microhenries per hundred turns. This parameter is obtained from the
data sheet supplied by the core manufacturer. All calculations are
based upon this parameter.
The minimum and maximum number of turns fields are used to specify a
range of turns. The default values are 1 and 60 respectively. The
screen and printout always have a range of 60 turns. The inductance
of coils having between 61 and 120 turns may be found by entering 61
as the minimum number and 120 as the maximum number. This same
technique can be used to extend the range even further if necessary.
Once all parameters have been entered, a table of inductance versus
turns is calculated and displayed on the screen. Also, the printer
prompt will appear on the screen. If a printed copy is desired,
Then, the prompt "do another" will appear on the screen. When
that you may enter parameters. When N
program reverts to the registration screen. Pressing
response to the prompt will return the system to DOS.
The program may be aborted at any time by pressing the CTRL and BREAK
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The Author reserves the right to make changes to this program package
in order to improve the reliability, function and/or design and does
not assume any liability from either the application or use of this
material. Under no circumstance shall the Author be liable to you
for any damages, including but not limited to lost profits, lost
savings, or other incidental or consequential damages arising from
the use of or inability to use this material. Further, although the
information presented herein has been checked and is believed to be
reliable, no responsibility is assumed for inaccuracies.
The FERRITE.COM program package is being distributed as User-
Supported Software. This gives you the opportunity to evaluate the
program at your convenience, on your own system in order to determine
whether or not it serves your application requirements. In other
words, the user-supported software concept let's you try before you
In return, the Author requests that you become a registered user once
you determine that the program is useful to you. To become a
registered user, a contribution of $5.00 for an individual or $50.00
for a corporation would be appreciated. Your contribution will help
offset development costs incurred by the Author and assure future
updates as well as new product offerings. In addition, each
registered user is placed on a mailing list for future notification.
Regardless of whether or not you become a registered user, please
continue to copy and share this program with others.
The Author welcomes ideas and suggestions that might be incorporated
into future versions of this program package. Please address your
contribution and/or correspondence to:
Scott R. Grabowski
P.O. Box 471
Newbury, OH 44065
For those individuals requiring an invoice for tax recording purposes
or for initiating payment through your company accounting system, the
following form is provided.
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From: Scott R. Grabowski
P.O. Box 471
Newbury, OH 44065
Registration Fee For: FERRITE.COM Program Package
[ ] Individual Registration $5.00
[ ] Corporate Registration $50.00
*Ohio residents please include 5% state sales tax.
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