Web Site For

Welcome to my web site!

I've listed a few of the projects I've been working on over the years.  Most are ham-related, but not all. These descriptions are not polished and complete in every detail and are still a work in progress, but you get what you pay for.

If you have any questions or comments, feel free to drop me an email at qsl.net.

Eric Williams WD6CMU
Richmond, CA

Super-accurate GPS clock

My own version of W3IWI's "Totally Accurate Clock" with improved user interface.

Atmel AVR serial programmer

G2 Pneumatic Antenna Launcher

Trident (G3) Pneumatic Antenna Launcher

WB6ZQZ's home page (more launchers)

Powerpole Distribution Blocks

Cool Koss DVD Player mod

WOW!  A GPS receiver for $20!

Please note that this receiver is no longer available from the listed source, but I've left the information on here for historical purposes.

Upcoming Projects

Travel Data Center – A gizmo that goes in my trailer to automatically log miles traveled, locations visited, and other travel data to a Multimedia Card utilizing an AVR microcontroller and $20 GPS receiver. It will also know which time zone it's in and display local time anywhere in the CONUS. UPDATE: The PC board has returned and been stuffed, testing and software development proceeds. First two pictures here and here.

Stepper Motor Controller – An AVR driving FET bridges to control a 5-phase .72 degree stepper motor What for? Maybe numeric lathe controls, maybe a PV panel solar tracker, maybe moving my telescope; I'll think of something once it's working.

Smart Charge Controller – WB6ZQZ has designed a nifty AVR-controlled charge controller, but software development remains. My plan is to develop one for controling the charge to a wet cell nickel-cadmium battery, which has special charging characteristics most controllers can't handle.

Super-short Antenna Launcher – WB6ZQZ's computer model indicates that a launcher with the performance of the Trident can be built in a coaxial design about 12 inches long and 5 inches in diameter. We'll put the theory to the test.

Casita Travel Trailer mods

A Casita is a small all-fiberglass trailer made in Rice, TX, with a following of loyal owners.  A couple of years ago, I found a used Casita in a local RV lot and have made a number of modifications to it.  The links below refer to threads in the Casita Club web site.

Electrical system upgrade

Part 1
Part 2
Cutting Board

Roll-up table alternative

Side-table upgrade

Air conditioner replacement

Where I work

Some of my photos

This page last updated 4/08/04