These are some designs of various types I had published back in the 70s and 80s, that I have been able to recover from the UK magazine archives in the World Radio History site: 


RC Failsafe - A simple device to connect in line with an RC servo, to send it to a pre-set position if the signal is lost. It can also be used as a simple servo tester, with just a 5 - 6V power supply.

Originally published in Practical Electronics, December 1978.



Digital Frequency Meter - A multi-range timer-counter, originally published in Television magazine, April to June 1983.



TV Test Pattern Generator - A full colour digitally generated "Test card" with anti-aliased image, originally published in Television magazine, May to September 1984.



All article content is copyright © Robert Jenkins and was published on a "first serial rights only" basis. [Tony Jenkins in some material is from my middle name, Anthony].

The magazine layouts are the property of the respective publishers. Blank sections are where other peoples material has been erased in respect of their copyright.