Coil Inductance Calculator

Version 1.0 27 April 2015

Summary

This is a special purpose calculator which calculates the properties of a
single-layer air-spaced coil. Given three parameters, the Widget calculates the
value of a fourth.

Output Mode

When the Widget is started, it displays a window with four fields. Enter data
into the three white fields, then press the RETURN or ENTER key. The Widget
computes the other value and displays it in the fourth field.

Which of the four values is to be computed can be set by clicking on the Output
Mode menu button.

Input Units

The unit of length can be set (as inches or millimeters) by clicking on the
Input Units menu button.

For single-layer coils, the formula used is: L = D*D*N*N/(18*D + 40*S) where D
is the diameter of the coil, N the number or turns, S the length of the coil and
L the inductance. Here D and S are in inches.

License

The Coil Inductance Calculator is Copyright © 2012,2015 Harry Whitfield (G6AUC).

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
St, Fifth Floor, Boston, MA 02110-1301 USA

Widget Concept, Coding and Documentation

Harry Whitfield (G6AUC)
