NOTE. These programs are free for anyone to use. But, there's no warranty that they actually work, and no support, although you can try sending an e-mail to VE3LNY. All programs are Windows 32-bit, unless otherwise noted, and should work on all modern Windows 32 and 64-bit systems (Tested up to Win10). They should also work on XP and earlier 32-bit windows, but you may have to install the Visual C++ 2008 Redistributable Package if you get some application can't be executed error message. (If the link I provided is broken, just do a search on the text of the link.)

The programs are licensed under the MIT License.

Calculate the prescaler and number of counts for a simple counter timer.

This program calculates the Fo, R and C values for a twin-t filter network.

The UC3906 is a Lead-Acid (SLA) or Gel-Cell battery charger controller by Unitrode (Texas Insruments). It is great for a battery charger project, but the calculations required are a bit tedious. This windows program lets you set the various inputs, then calculates the 5 resistances needed in the circuit. (For more information see UC3906 Datasheet and VK3EM's Project (PDF documents.) (Updated July '12 to increase allowable iMax to 10A from 1A.) (Updated 2017-08-26 to fix calculation of Rt, thanks to KM6HXR.)

DLWIN version 1.9.1

There may not be many who remember the DL program I developed in the DOS days when I worked for IBM, but I  have had a few requests for a windows version. I finally implelented a Windows version in 2008. Its a different kind of shell for the contents of a folder, that lets you execute commands on selected files. (Updated Dec. '14 with 2 new features.)

SEARCH version 1.2.0

I couldn't stand the Windows Search landscape anymore so I wrote my own quick and dirty file and folder search.

PMON2 version 1.3.2

This program is used with a dial-up modem to block telemarketing calls. Download the zip file and look at pmon2.html for more information. 2017-04 and 2017-08 update: minor adjustments due to different messages received after switch from land line to VOIP adapter. 2020-02 update: Added option to block calls when caller name is the same as caller number.

The following programs are all Windows command line. I grew up on DOS, and I still  like to do a lot of work on the command line. In case you don't know, you can get a DOS session by creating a shorcut to a program named cmd.

This is one of my command line programs for Windows that copies "newer" files from one place to another. It is really useful for copying large number of files but only those that have obviously changed. There is more information in the "copynew.txt" file included in the download.  (Added /h option Dec. '08. Automatically exclude system folders June '09.)

Did you love the DOS deltree command? Can't find it in Windows anymore? Try this one. WARNING: this program deletes files, possibly all the files on a drive! Use with care. Updated 2012-Jan to fix error specifying the root, ie deltree f:\ .