1E)
This circuit was found in a Popular Electronics from the 90s. The circuit generates different control signals over the same line. The transistors are from the era.
This remote-control circuit was found in Radio Electronics magazine from June 1962. It drives a...
This is the receiver for the previous circuit we found in the December 1992 Radio Electronics...
This circuit with a few watts of power was found in the April 1995 issue of Electronics Now...