Used with infrared remotes at the time, this circuit was found in a 1991 RE Experimenter Handbook. It may not work with the faster remotes control used today.
This very simple circuit must use coal microphones of the type found in very old equipment. The...
This biestable circuit was found in a Popular Electronics from the 90s. The circuit has an unusual...
This circuit was found in a 1969 US documentation. It provides a signal that can be externally...