We found this mains-powered switch circuit in Electronics Now magazine from July 1994. It could be used in a table lamp or touch control.
This small 3 transistor transmitter was found in an English publication from 1963. The coils must...
This circuit is from 1964 documentation but can be easily implemented based on current components....
We obtained this circuit from the 1977 National Semiconductor FET Databook. The frequency depends only...