The LM318 is not a common component today. The circuit is suggested by National Semiconductor in its 1994 Linear Applications Handbook.
This modulated light transmitter was found in a 90s Popular Electronics. In place of the lamp with...
This circuit was found in a 1988 publication. The circuit is an alarm with interrupt sensors that...
This automatic switch for multiple loads was shown in the May 1983 issue of Radio Electronics...