This circuit appeared in the 1991 Electronics Experimenter Handbook. The circuit is for remote controls of the time that are slower than today's and may not work with modern types.
Two transistors on a regenerative switch are used to trigger a triac. This circuit is from the RCA...
This circuit uses a 555 (according to the diagram) to generate 50 ms tone bursts at a frequency of 1.5...
The radio presented was found in a 1980 documentation. It consists of 3 stages: the tuning circuit...