New! Bootloader for Amicus & Swordfish

The ds30 Loader supports Amicus and Swordfish on the TAP-28.  Customized load files for the 18F25K20 are posted here.

Details and Files Here


Technical Notes from a long ago time before transistors, LEDs and microcontrollers.


It was a time long ago.  Before transistors and LEDs.  The Eniac computer was under development with nearly 20,000 vacuum tubes.  A computer on every desk wasn't even a concept yet.  Tools at the engineer's disposal include slide rules and math books filled with log tables.  The view above shows the important tools of the day.

The Weston Electrical Instrument Corporation was one of the big names of the day.  Large analog voltmeters with mirrored scales ensured measurement accuracy.  The Weston Standard Cell set the standard for the volt.  Weston may be familiar to many for their photographic exposure meters.

The Weston Engineering Notes presented here are a fascinating glimpse into these days of electronics history.  Some things are vastly out of date.  Others, like the equations for a Whetstone Bridge will live on forever although few of us will try to use a slide rule to calculate the values!



The Weston Electrical Instrument Corporation has disappeared in a series of acquisitions, mergers, breakups and the revenges of business.  As far as I can determine, no trace of Weston remains and there is no one to claim copyright on these documents.  I'd like to think that the author would take some pleasure in knowing that engineers are still enjoying his efforts.  And what efforts these notes are.  Marvel at the hand-drawn artwork throughout the notes.

I'll add more issues as I scan them.  Click the links below for the 8 page pdf of each issue.


Index to Volume 1 and 2 (pdf)

Volume 1

Volume 1, Number 1, February, 1946

Volume 1, Number 2, April, 1946

Volume 1, Number 3, June, 1946

Volume 1, Number 4, August, 1946

Volume 1, Number 5, October, 1946

Volume 1, Number 6, December, 1946




Volume 2

Volume 2, Number 1, February, 1947

Volume 2, Number 2, April, 1947

Volume 2, Number 3, June, 1947

Volume 2, Number 4, August, 1947

Volume 2, Number 5, October, 1947

Volume 2, Number 6, December, 1947




True heroes of geekdom