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Calculator Widgets
These programs are distributed in the hope that they will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.
Most are made available 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, but see the License conditions for each individual program.
These programs are in the form of Yahoo! Widgets
which require installation of the Yahoo! (Konfabulator) Widget Engine.
Yahoo! Widgets are coded in XML and javascript.
They are packaged as zipped Widgets (with extension .widget) inside a zipped folder. The
code can be examined by unzipping the .widget files.
Download figures are the final download counts at the close of the Yahoo! Widget Gallery.
 AC 3Phase Calculator (Downloads: 4,317)

This is a special purpose calculator which performs simple 3phase alternating
current calculations.
Given three of the four quantities voltage, current, power factor and power, the Widget
calculates the value of the fourth.
Two formulae are used, one for line voltages and currents, the other for phase voltages
and currents.
You may also use the new web version
or download the files for local use in your browser.
 Attenuator (Downloads: 8,525)

Attenuator is a special purpose calculator for the design of passive resistive attenuators
and impedance matching circuits.
Version 2.1
The Widget can assist in the design of PInetwork, Tnetwork, BTnetwork, Bnetwork
and Lnetwork attenuators and impedance matching circuits.
It can perform single calculations and (in symmetric cases) generate tables for later use.
 Coil Inductance

This is a special purpose calculator which calculates the properties of a singlelayer
airspaced coil. Given three parameters, the Widget calculates the value of a fourth.
 Convert Time (Downloads: 12,949)

Convert Time converts local time to various other time formats.
 Convert Unix Time (Downloads: 12,373)

Convert Unix Time converts Unix timestamps to various other time formats, including Local
Time, Universal Time, NTP Time, Internet Time, Julian Date, and GPS Week. It can also
function as a clock in any of its time formats.
 DMXconverter (Downloads: 5,840)

DMXconverter is a special purpose calculator Widget for use with DMX512 installations. It
converts between full channel numbers and the corresponding DMX channel settings.
 Easter Date

Displays the date of Easter Sunday for a given year.
 HexDeCoder (Downloads: 41,828)

HexDeCoder is a simple hexadecimal, decimal, octal and binary number converter Widget.
There is also an option to choose a custom base/radix between 2 and 36 and an option to
convert between Unicode characters and their UTF16 or UTF8 character encodings.
 Intersecting Circles Calculator

Version 1.0
This is a special purpose calculator which computes properties of intersecting circles.
 Interval Calculator (Downloads: 7,821)

Interval Calculator computes the date and time at the end of an interval entered by the
user. Its initial use was to work out the time at which an internet auction would expire.
 LCR Resonance Calculator

Version 1.1
This is a special purpose calculator for the analysis of LCR resonant circuits.
 Lensmaker

Version 1.0
This is a special purpose calculator which computes the optical power of a lens using the Lensmaker's Equation.
 Lunar Date (Downloads: 14,743)

Lunar Date converts between Gregorian dates and approximate lunar dates. It also displays
the Julian date and the day of the week.
 NetCalc  an RF Impedance Calculator (Downloads: 23,979)

NetCalc is broadly based on the
program NETCALC by Ian White. NETCALC was
described by Ian as a simple impedance calculator for working out Radio
Frequency network design ideas.
This Widget can be used on Windows and on older version of macOS (before 10.11 El Capitan).
You may also use the new web version
or download the files for local use in your browser.
 NGR Converter (Downloads: 5,863)

NGR Converter is a National Grid Reference to latitude and longitude converter.
The Widget converts between British National Grid References, latitude and longitude, and
IARU Locators.
 Ohm's Law Calculator (Downloads: 24,545)

This is a special purpose calculator which performs simple calculations using
Ohm's Law. Given any two of the four quantities  voltage, current, resistance
or power  the Widget calculates the values of the other two.
You may also use the new web version
or download the files for local use in your browser.
 Resistors (Downloads: 22,247)

The Resistors Widget is a special purpose calculator which can be used to decode
the colored bands on resistors (and some small capacitors).
 Roman Kalculator

This is a general purpose calculator which also features Roman numbers.
Version 1.0
 Roman Kalculator Hex

This is a general purpose calculator which also features Roman and hexadecimal numbers.
Version 1.0
 Sunrise Calculator (Downloads: 20,063)

Sunrise Calculator computes and displays the times of sunrise and sunset, given a
latitude, a longitude and a date.
The Widget can make allowances for altitudes of up to 15,240 metres (50,000 feet). The
altitude compensation calculation, performed by the Widget, is not part of the published
algorithm, on which the main calculation is based, and should be treated with caution.
This new version also computes and displays the times of moonrise and moonset.
 TLC  Transmission Line Calculator (Downloads: 2,482)

This is a special purpose calculator which performs transmission line
calculations. Various geometries are possible with the hot and cold conductors
having elliptic or rectangular shapes. The Widget calculates the line
characteristics and displays the voltage field.
 Toric Lens Converter

Version 2.0
This is a special purpose calculator which converts toric lens descriptions between the two standard formats.
It can also add the powers of two toric lines.
 Tx Line Calculator (Downloads: 3,135)

This is a special purpose calculator which performs simple transmission line
calculations. Given three line parameters, the Widget calculates the value of a
fourth. Two formulae are used, one for coaxial cable, the other for parallel
line.
 Wiring Calculator

This is a special purpose calculator which performs simple wiring calculations for copper wires used in low voltage circuits.
Given three of the four quantities circuit length, current, wire cross section and voltage drop, the Widget calculates the value of the
fourth.
WARNING: The calculator was designed to calculate the voltage drop in low voltage (12/24 volt) marine circuits where the voltage drop
due to long wire circuits is more often a problem than the current carrying capacity of the wires.
No attempt has been made to ensure that the results of any of the Widget's calculations conform to current electrical codes,
such as the NEC or IEC codes. Users must check these and other safety matters for themselves.
The user can choose to work in SI units or USA units.
You may also use the new web version
or download the files for local use in your browser.
Sunday, August 4, 2019.